JP2004190459A

JP2004190459A - Screw shaft fixing structure and concrete form connecting tool for earth retaining wall

Info

Publication number: JP2004190459A
Application number: JP2002371650A
Authority: JP
Inventors: Masanobu Maeizumi; 正信前泉; Setsuo Kobayashi; 節郎小林
Original assignee: Kunimoto Shokai Co Ltd
Current assignee: Kunimoto Shokai Co Ltd
Priority date: 2002-10-16
Filing date: 2002-12-24
Publication date: 2004-07-08
Anticipated expiration: 2022-12-24
Also published as: JP3993512B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw shaft fixing structure for easily and strongly fixing a screw shaft screwed by a required quantity in a screw hole of a body. <P>SOLUTION: This screw shaft 22a fixing structure is threadedly fitted and joined to the screw hole 7 of the body (a U-shaped belt-like plate 5), and has an operating large tongue piece 8 cut upward and formed on the body (the U-shaped belt-like plate 5) so as to project in the direction for going away from the screw hole 7, and a locking small tongue piece 9 cut upward and formed in the shape of widening a width of a base part more than a width of the tip in the inverse direction of the operating large tongue piece 8 in this operating large tongue piece 8. The structure is also constituted so that when applying operation force in the axial direction of the screw hole 7 to the tip 8a of the operating large tongue piece, the operating large tongue piece bends on both sides of the wide base part of the locking small tongue piece 9, and a part up to the tip 9a of the locking small tongue piece 9 from the tip 8a of the operating large tongue piece 8 integrally tilts, and the tip 9a of the locking small tongue piece 9 bites in a screw groove of the screw shaft 22a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、種々の用途に活用出来る螺軸固定構造と、当該螺軸固定構造を採り入れた土留め壁用コンクリート型枠連結具とに関するものである。
【０００２】
【従来の技術】
例えば、立設させた矢板支持用Ｈ形鋼間に所要枚数の矢板を落とし込んで構成される土留め壁との間にコンクリート壁を構築する場合、当該土留め壁との間に所要間隔を隔ててコンクリート型枠を仮設しなければならない。このとき、コンクリート型枠に一端を結合したセパレーター（螺軸）の他端を土留め壁の適当箇所に結合するための螺軸固定構造が必要になるが、従来のこの種の螺軸固定構造は、特許文献１に記載されるように、一端部にセパレーター連結用ネジ孔を備えた筒状体の当該一端部外側に帯状板を固着連設して操作用大舌片を構成し、この操作用大舌片の中間位置に、先端が前記ネジ孔の方に向いた係止用小舌片を切り起こし形成すると共に、当該係止用小舌片の基部の左右両側で操作用大舌片の両側辺に切欠き部を形成し、操作用大舌片の先端に前記ネジ孔の軸心方向の操作力を与えたとき、当該操作用大舌片が前記切欠き部の位置で折曲して、操作用大舌片の先端から係止用小舌片の先端までの部分が一体に傾動し、係止用小舌片の先端が前記ネジ孔に螺合するセパレーターの螺軸部に食い込むように構成されていた。
【０００３】
【特許文献１】
特開平８−３０３００５号公報
【０００４】
【発明が解決しようとする課題】
上記のような従来の土留め壁用コンクリート型枠連結具に利用されていた螺軸固定構造では、連結具本体となる筒状体に操作用大舌片を構成する帯状板を溶接等で固着連設しなければならないばかりでなく、当該操作用大舌片には、係止用小舌片の切り起こし加工と左右一対の切欠き部の加工とが必要であるため加工コストが高くつき、操作用大舌片（帯状板）の取付強度が十分でないと、この操作用大舌片にハンマー等で操作力を加えたときに当該操作用大舌片が連結具本体から外れて使用不能になる恐れもあった。
【０００５】
【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土留め壁用コンクリート型枠連結具を提供するのに役立つと共に、他の各種用途に活用出来る螺軸固定構造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、ネジ孔７を備えた本体２と、当該ネジ孔７に螺嵌結合される螺軸（セパレーター２２の一端螺軸部２２ａ）とから成る螺軸固定構造であって、前記本体２に切り起こし形成された操作用大舌片８と、この操作用大舌片８内に切り起こし形成された係止用小舌片９とを備え、前記操作用大舌片８は、先端が前記ネジ孔７から遠ざかる方向に突出するように切り起こされ、前記係止用小舌片９は、前記操作用大舌片８とは逆向きで且つ先端の巾より基部の巾が広くなる形状に切り起こされ、前記操作用大舌片８の先端８ａに前記ネジ孔７の軸心７ａ方向に操作力を加えたとき、前記係止用小舌片９の巾広基部９ｂの両側で前記操作用大舌片８が屈曲して、前記操作用大舌片８の先端８ａから係止用小舌片９の先端９ａまでの部分が一体に傾動し、係止用小舌片９の先端９ａが前記螺軸（セパレーター２２の一端螺軸部２２ａ）のネジ溝に食い込む構成となっている。
【０００６】
上記構成の本発明を実施する場合、前記操作用大舌片８は、中間位置から先端までの部分が前記ネジ孔７の軸心７ａから遠ざかるように屈曲するくの字形のものとし、前記係止用小舌片９は、前記操作用大舌片８の中間屈曲部８ｂより先端８ａ側に巾広基部９ｂを配置すると共に小巾先端９ａが前記ネジ孔７に向かって前記操作用大舌片８の内側に突出するように形成することが出来る。
【０００７】
又、前記本体２は、前記ネジ孔７側で折り返したコ字形帯状板５を備えたものとし、前記ネジ孔７は、前記コ字形帯状板５の折り返し端部６に形成された操作用大舌片８の切り起こし跡の貫通孔１０と、当該コ字形帯状板５の折り返し端部６の内側に固定されたナット１１とで構成することが出来る。この場合、前記ナット１１は、前記コ字形帯状板５間に回転不能に挟持させると共に、当該コ字形帯状板５からプレス加工で内側に突出するように形成された突部１２ａ，１２ｂと当該コ字形帯状板５の折り返し端部６との間で溶接によらずに挟持固定するのが望ましい。
【０００８】
本発明は又、上記構成の螺軸固定構造を応用した土留め壁用コンクリート型枠連結具も提供する。即ち、本発明による土留め壁用コンクリート型枠連結具は、本体２の一端に土留め壁への連結部３が設けられると共に他端にセパレーター連結部４が設けられた連結具１であって、前記本体２は、セパレーター連結部４側で折り返したコ字形帯状板５を備え、セパレーター連結部４は、前記本体２のコ字形帯状板５の折り返し端部６に設けられたねじ孔７と、当該コ字形帯状板５に切り起こし形成された操作用大舌片８と、この操作用大舌片８内に切り起こし形成された係止用小舌片９とから成り、前記操作用大舌片８は、先端が前記ねじ孔７から遠ざかる方向に突出するように切り起こされ、前記係止用小舌片９は、前記操作用大舌片８とは逆向きで且つ先端の巾より基部の巾が広くなる形状に切り起こされ、前記操作用大舌片８の先端８ａに前記ねじ孔７の軸心７ａ方向に操作力を加えたとき、前記係止用小舌片９の巾広基部９ｂの両側で前記操作用大舌片８が屈曲して、前記操作用大舌片８の先端８ａから係止用小舌片９の先端９ａまでの部分が一体に傾動する構成となっている。
【０００９】
上記構成の本発明による土留め壁用コンクリート型枠連結具に於いても、先に説明したように、前記操作用大舌片８は、前記コ字形帯状板５の折り返し端部６の片側の角部から起立し且つ中間位置から先端までの部分が前記ねじ孔７の軸心７ａから遠ざかるように屈曲するくの字形のものとし、前記係止用小舌片９は、前記操作用大舌片８の中間屈曲部８ｂより先端８ａ側に巾広基部９ｂを配置すると共に小巾先端９ａが前記ねじ孔７に向かって前記操作用大舌片８の内側に突出するように形成することが出来る。
【００１０】
又、前記ねじ孔７は、前記コ字形帯状板５の折り返し端部６に形成された操作用大舌片８の切り起こし跡の貫通孔１０と、当該コ字形帯状板５の折り返し端部６の内側に固定されたナット１１とで構成することが出来る。この場合、前記ナット１１は、前記コ字形帯状板５間に回転不能に挟持させると共に、当該コ字形帯状板５からプレス加工で内側に突出するように形成された突部１２ａ，１２ｂと当該コ字形帯状板５の折り返し端部６との間で溶接によらずに挟持固定するのが望ましい。
【００１１】
前記本体２の土留め壁への連結部３は、前記コ字形帯状板５の遊端部間に挟持固定されて当該コ字形帯状板５から突出する螺軸部１４から構成することが出来る。この場合、土留め壁１７側には、例えば矢板支持用Ｈ形鋼１８や鋼製の矢板１９の適当箇所に、前記螺軸部１４を螺合させることが出来るネジ孔付き部材２１が溶接等で取り付けられる。この螺軸部１４から成る土留め壁への連結部３を採用する場合、当該螺軸部１４として、頭部１５ａが前記コ字形帯状板５の遊端部間に溶接によらずに回転不能に挟持固定されたボルト１５を利用するのが望ましい。
【００１２】
土留め壁１７の木製の矢板１９等に対して連結出来るようにする場合には、前記本体２の土留め壁への連結部２７は、前記コ字形帯状板５の遊端部を外向きに折曲して形成した一対の取付板部２８ａ，２８ｂと、この取付板部２８ａ，２８ｂに設けられた取付孔２９とから構成し、前記取付孔２９を利用して本体２を木製矢板１９に釘止めやネジ止め出来るように構成することが出来る。
【００１３】
又、貫通孔３３を加工出来る木製の矢板１９等の場合は、前記本体２の土留め壁への連結部３２は、前記コ字形帯状板５の遊端側に連設され且つ矢板１９に設けられた貫通孔３３への差込み部３４と、この差込み部３４と平行な差込み姿勢と直交する抜け止め姿勢とに切換自在に当該差込み部３４の先端に軸支された係止片３６と、前記差込み部３４に設けられた楔係止部３７と、この楔係止部３７に差し込まれて、抜け止め姿勢の前記係止片３６との間で矢板１９を固定する楔板３８とから構成することが出来る。
【００１４】
更に、溶接等を利用しないで、矢板支持用Ｈ形鋼１８に簡単に連結出来るようにする場合は、前記本体２の土留め壁への連結部４２は、前記コ字形帯状板５の遊端側に連設された、矢板支持用Ｈ形鋼１８のフランジ部１８ａに引っ掛ける鉤状部４３と、この鉤状部４３との間で前記Ｈ形鋼フランジ部１８ａを挟持する弾性係止片４４とから構成することが出来る。
【００１５】
【発明の実施の形態】
以下に本発明による螺軸固定構造を土留め壁用コンクリート型枠連結具に応用した場合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は第一実施形態の連結具であって、本体２と、この本体２の一端に設けられた土留め壁への連結部３と、本体２の他端に設けられたセパレーター連結部４とから成る。
【００１６】
前記本体２は、セパレーター連結部４側で折り返したコ字形帯状板５を備え、セパレーター連結部４は、前記コ字形帯状板５の折り返し端部６に設けられたネジ孔７と、当該コ字形帯状板５の折り返し端部５に切り起こし形成された操作用大舌片８と、この操作用大舌片８内に切り起こし形成された係止用小舌片９とから構成されている。
【００１７】
前記操作用大舌片８は、前記コ字形帯状板５の折り返し端部６の片側の角部から起立し且つ中間位置から先端８ａまでの部分が前記ネジ孔７の軸心７ａから遠ざかるように屈曲するくの字形のものであり、前記係止用小舌片９は、前記操作用大舌片８とは逆向きで且つ先端９ａの巾より基部９ｂの巾が広くなる台形状に切り起こされたものであり、前記操作用大舌片８の中間屈曲部８ｂより先端８ａ側に巾広基部９ｂが配置されると共に小巾先端９ａが前記ネジ孔７に向かって前記操作用大舌片８の内側に突出するように形成されている。
【００１８】
前記ネジ孔７は、前記コ字形帯状板５の折り返し端部６に形成された操作用大舌片８の切り起こし跡の貫通孔１０と、当該コ字形帯状板５の折り返し端部６の内側に固定されたナット１１とで構成されている。前記ナット１１は、溶接でコ字形帯状板５の折り返し端部６の内側に固着することも出来るが、この実施形態では、六角形等の角形のナット１１を使用し、このナット１１を前記コ字形帯状板５の両側板５ａ，５ｂ間に回転不能に挟持させると共に、当該両側板５ａ，５ｂからプレス加工で内側に突出するように形成された突部１２ａ，１２ｂと当該コ字形帯状板５の折り返し端部６との間で溶接によらずに挟持固定させている。１３ａ，１３ｂは、ナット１１を挟んで位置決めするためにコ字形帯状板５の折り返し端部６の両側辺にプレス加工で内側に突出するように形成された突部であって、ナット１１が両側板５ａ，５ｂ間で横方向に移動するのを阻止する。
【００１９】
前記本体２の土留め壁への連結部３は、各種のものが考えられるが、この実施形態では、前記コ字形帯状板５の遊端部間に挟持固定されて当該コ字形帯状板５から突出する螺軸部１４で構成している。当該螺軸部１４としては、頭部を持たない全長にわたって同一径の螺軸を使用することも出来るし、前記コ字形帯状板５の遊端部に対する当該螺軸部１４の固着手段も、溶接等、如何なる手段であっても良いが、この実施形態では、六角形等の角形の頭部１５ａが前記コ字形帯状板５の遊端部間に溶接によらずに回転不能に挟持固定されたボルト１５を利用している。この場合、コ字形帯状板５の遊端部に於ける両側板５ａ，５ｂは、ボルト１５の頭部１５ａと軸部、即ち、螺軸部１４とを両側から抱持するように絞られるが、螺軸部１４の両側に張り出す翼部５ｃ，５ｄに於いて両側板５ａ，５ｂどうしをリベット等の止着具１６で固着している。
【００２０】
図４に示すように、従来周知の通り土留め壁１７は、適当間隔おきに立設された矢板支持用Ｈ形鋼１８間に所要枚数の矢板１９を落とし込んで、上下に隣接する矢板１９によって土留めのための壁を構成したものであり、上記構成の連結具１を使用するために、矢板支持用Ｈ形鋼１８のコンクリート壁築造側（山側とは反対側）のフランジ部１８ａの外側面適当箇所に、連結具１の螺軸部１４を螺合し得るネジ孔を備えた部材、具体的には、ナット２０を内側に固着した部材２１が溶接により固着される。そして連結具１の前記螺軸部１４を部材２１のナット２０（ネジ孔）に螺合締結し、所要長さに調整されたセパレーター２２の一端螺軸部２２ａを、図２Ａ，Ｂに示す連結具１のセパレーター連結部４に於けるネジ孔７（ナット１１のネジ孔）に螺合する。
【００２１】
連結具１のネジ孔７（ナット１１のネジ孔）にセパレーター２２の一端螺軸部２２ａを螺合するとき、ネジ孔７の外側で横側方に位置する係止用小舌片９は当該セパレーター２２の一端螺軸部２２ａとは接触しないように構成されるが、両者が接触する状況であっても、当該係止用小舌片９がセパレーター２２の螺進方向に傾斜しているので、セパレーター２２で当該係止用小舌片９を外側に押圧変形させた状態でセパレーター２２を問題なく螺進させることが出来る。
【００２２】
上記のように連結具１のネジ孔７に所要深さまで螺合させたならば、図２Ｃに示すように、操作用大舌片８の先端８ａをセパレーター２２の螺進方向（ネジ孔７の軸心方向）にハンマーその他の適当な工具又は資材で打ち叩いて操作力Ｆを加える。この結果、操作用大舌片８が操作力Ｆの方向に曲げられることになるが、その曲げの支点は、当該操作用大舌片８の先端８ａまでの全域の内、最も曲げ強度の低い場所、即ち、図３に示す係止用小舌片９の巾広基部９ｂの左右両側の最も巾の狭い箇所８ｃ，８ｄになる。従って、この箇所８ｃ，８ｄを支点にして操作用大舌片８の先端８ａと係止用小舌片９の先端９ａとの間の部分が一体に傾動し、図２Ｃに示すように、係止用小舌片９の先端９ａがセパレーター２２側に接近移動して当該セパレーター２２の一端螺軸部２２ａのネジ溝に食い込み、当該セパレーター２２を連結具１にロックすることになる。
【００２３】
セパレーター２２の他端に対するコンクリート型枠２３の結合は、従来周知の通り、例えばセパレーター２２の他端部に結合された型枠受け用コーン２４や、型枠２３の外側でセパレーター２２（前記コーン２４から突出する螺軸部）に連結される型枠締結金具２５等を使用して行われる。
【００２４】
図４は、第２実施形態の連結具２６を示している。この連結具２６は、本体２の一端のセパレーター連結部４は、先の第１実施形態の連結具１と同一であり、本体２の他端の土留め壁への連結部３が異なっている。即ち、この連結具２６に於ける土留め壁への連結部２７は、本体２を構成するコ字形帯状板５の両側板５ａ，５ｂの遊端部を外向きに折曲して形成した一対の取付板部２８ａ，２８ｂと、この取付板部２８ａ，２８ｂそれぞれに設けられた複数の取付孔２９とから構成されている。３０は、コ字形帯状板５の両側板５ａ，５ｂと取付板部２８ａ，２８ｂとの間の入り隅部にプレス加工で一体成型した補強用リブである。
【００２５】
この連結具２６は、図４に示す土留め壁１７の矢板１９が主として木製である場合に使用されるもので、矢板１９の適当箇所に連結具２６を、その一対の取付板部２８ａ，２８ｂの取付孔２９を利用して釘やネジ等の適当な止着具で固定して使用することが出来る。この連結具２６にセパレーター２２を介してコンクリート型枠２３を取り付ける方法は、先の実施形態に示した連結具１と同様である。
【００２６】
図６に示す第３実施形態の連結具３１は、本体２の一端のセパレーター連結部４は、先の第１実施形態の連結具１と同一であり、本体２の他端の土留め壁への連結部３が異なっている。即ち、この連結具３１に於ける土留め壁への連結部３２は、前記コ字形帯状板５の遊端側に連設され且つ矢板１９に設けられた貫通孔３３への差込み部３４と、この差込み部３４と平行な差込み姿勢と直交する抜け止め姿勢とに切換自在に当該差込み部３４の先端に支軸３５で軸支された係止片３６と、前記差込み部３４に設けられた楔係止部３７と、この楔係止部３７に差し込まれて、抜け止め姿勢の前記係止片３６との間で矢板１９を固定する楔板３８とから構成されている。
【００２７】
前記差込み部３４は、一端部をコ字形帯状板５の両側板５ａ，５ｂ間に挟んでリベット等の止着具３９で固着された帯状板４０で構成され、前記係止片３６は、前記帯状板４０と同一巾か又は若干巾の狭い帯状板をＵ字形に折曲したもので、これを前記帯状板４０の遊端部に外嵌させた状態で支軸３５で軸支し、当該係止片３６の折り返し端部３６ａを前記帯状板４０の遊端外側に位置させた状態が前記差込み姿勢となるように構成されている。又、前記楔係止部３７は、前記帯状板４０にその長さ方向に平行に形成した長孔３７ａで構成している。この長孔３７ａの外端（係止片３６から遠い側の端）は、コ字形帯状板５の両側板５ａ，５ｂの遊端と面一になるように配置されている。
【００２８】
前記差込み部３４は、コ字形帯状板５の両側板５ａ，５ｂを延長して構成することも出来る。この場合、係止片３６は、コ字形帯状板５の両側板５ａ，５ｂ間に遊嵌して軸支される１枚の厚板から構成することが出来るし、楔係止部３７は、コ字形帯状板５の両側板５ａ，５ｂ間で形成される楔板差込み隙間と、当該両側板５ａ，５ｂ間に差し込まれる楔板３８の係止片３６から遠い側の斜辺を受ける止めるように両側板５ａ，５ｂ間に形成された受け部分とで構成することが出来る。
【００２９】
上記構成の連結具３１を使用する場合は、矢板１９の適当箇所に前記差込み部３４を貫通させることが出来る程度の直径の貫通孔３３が予め穿設される。而して、当該貫通孔３３に連結具３１の差込み部３４を、係止片３６を当該差込み部３４と平行な差込み姿勢にした状態で貫通させ、矢板１９の外側で係止片３６を差込み部３４に対し直交する抜け止め姿勢に切り換える。このとき、係止片３６の重心と支軸３５との位置関係により、矢板１９の貫通孔３３から外側に突出した係止片３６が自然に重力で支軸３５の周りに９０度回転して、抜け止め姿勢に切り換わるように構成するか又は、係止片３６を抜け止め姿勢で保持されるようにスプリングで付勢しておくのが望ましい。
【００３０】
矢板１９の貫通孔３３に連結具３１の差込み部３４を差込み、係止片３６を抜け止め姿勢に切り換えたならば、楔板３８を楔係止部３７（長孔３７ａ）に圧入して、当該楔板３８と抜け止め姿勢の係止片３６とで本体２の一端（差込み部３４）を矢板１９に直角向きに固定し、この後、図４に示す第１実施形態の連結具１と同様に、連結具３１のセパレーター連結部４にセパレーター２２を介してコンクリート型枠２３を連結すれば良い。
【００３１】
図７に示す第３実施形態の連結具４１は、本体２の一端のセパレーター連結部４は、先の第１実施形態の連結具１と同一であり、本体２の他端の土留め壁への連結部３が異なっている。即ち、この連結具４１に於ける土留め壁への連結部４２は、前記コ字形帯状板５の遊端側に連設された、矢板支持用Ｈ形鋼１８（図４参照）のフランジ部１８ａに引っ掛ける鉤状部４３と、この鉤状部４３との間で前記Ｈ形鋼フランジ部１８ａを挟持する弾性係止片４４とから構成されている。
【００３２】
具体的に説明すると、前記コ字形帯状板５の遊端部には、両側板５ａ，５ｂをそれぞれ半円形断面に成形すると共に両者を互いに合わせて円筒状部４５が形成され、鉤状部４３は、１枚の金属板をプレス成形したもので、連結具本体２に対して直角横向きに延出する先端部４３ａを備え、基部には、前記コ字形帯状板５の遊端円筒状部４５を挟み込む断面Ｕ字形部分４３ｂが形成され、この断面Ｕ字形部分４３ｂの底部に形成した外側への突曲部４３ｃの内側に弾性係止片４４の基部に形成した凸部４４ａが嵌合し、当該弾性係止片４４の基部をコ字形帯状板５の遊端円筒状部４５との間で挟んだ状態で、当該コ字形帯状板５の遊端円筒状部４５と鉤状部４３の断面Ｕ字形部分４３ｂとがリベット等の止着具４６で固着されている。又、鉤状部４３は、前記断面Ｕ字形部分４３ｂから先端部４３ａの端まで連続し且つ外側へ突曲するリブ４３ｄが形成されている。弾性係止片４４は、前記鉤状部４３の先端部４３ａの端の内側の位置から当該鉤状部４３の先端部４３ａに向かって斜め内向きに突出する係止部４４ｂを備えている。
【００３３】
上記の連結具４１は、矢板支持用Ｈ形鋼１８（図４参照）のフランジ部１８ａに対して鉤状部４３を、このフランジ部１８ａが鉤状部４３の先端部４３ａと弾性係止片４４の係止部４４ｂとの間に当該弾性係止片４４の弾性に抗して入り込むように係合させて、フランジ部１８ａに対し略直角向きに保持させる。この後、図４に示す第１実施形態の連結具１と同様に、連結具４１のセパレーター連結部４にセパレーター２２を介してコンクリート型枠２３を連結すれば良い。
【００３４】
尚、上記の連結具４１に於ける鉤状部４３は、前記コ字形帯状板５の遊端部を成形して、当該コ字形帯状板５と一体に構成することも出来る。又、本発明の連結具本体２に設けられる土留め壁への連結部は、以上に示した各実施形態の連結部３，２７，３２，４２に限定されるものではなく、特許文献１に示されるような従来周知の連結部の構成も採用出来る。
【００３５】
以上の実施形態は、本発明の螺軸固定構造を土留め壁用コンクリート型枠連結具に応用したものであるが、本発明は土留め壁用コンクリート型枠連結具に限定されるものではなく、各種の螺軸固定構造、即ち、本体のネジ孔に螺嵌結合される螺軸の固定手段として応用出来るものである。例えば、ターンバックル式のブレースは、ネジ孔付き連結具本体とこの本体にネジ結合される２本の連結杆とから構成されるが、このターンバックル式のブレースのネジ孔付き連結具本体に本発明を適用出来る。又、２部材をネジで連結する連結具だけでなく、例えばネジ式クランプのクランプ用螺軸の固定手段としても活用出来る。
【００３６】
【発明の効果】
以上のように実施し且つ使用することが出来る本発明の螺軸固定構造によれば、本体のネジ孔に螺軸を所要量だけ螺嵌した状態で操作用大舌片の先端に前記ネジ孔の軸心方向に操作力を加え、以て、当該操作用大舌片に切り起こし成形されている係止用小舌片を、その先端が前記螺軸のネジ溝に食い込むように変形させ、この係止用小舌片先端の螺軸ネジ溝への食い込みにより当該螺軸を前記本体にに固定することが出来るのであるが、特に本発明の構成によれば、前記本体に、前記係止用小舌片を備えた操作用大舌片が一体に切り起こし形成されており、従来のように操作用大舌片を構成する別部材を溶接等で固着するものと比較して、操作用大舌片にハンマー等で操作力を与えたときに当該操作用大舌片が不測に外れてしまうというような不都合が生じる恐れがなくなり、しかも、係止用小舌片を、先端の巾より基部の巾が広くなる形状に切り起こすものであるから、従来のように操作用大舌片の両側辺に別に切込みを設けなくとも、当該係止用小舌片の巾広基部の両側に配置されている操作用大舌片の曲げ強度の弱い部分の存在により、必ずこの係止用小舌片の巾広基部の位置で操作用大舌片を曲げ変形させ、確実に係止用小舌片を所期通りに変形させて、螺軸の固定作用を正確に発揮させることが出来る。
【００３７】
尚、請求項２に記載の構成によれば、操作用大舌片がくの字形に屈曲しており、係止用小舌片の巾広基部の位置、換言すれば操作用大舌片の曲げ支点となる位置をネジ孔の軸心（螺軸の軸心）に接近させることが出来るので、係止用小舌片の長さを短くし、操作用大舌片の僅かな曲げ変形で係止用小舌片の先端を確実に螺軸のネジ溝に食い込ませ、強力な螺軸固定効果を得ることが出来る。
【００３８】
又、請求項３に記載の構成によれば、ナットを利用して本体端部に螺軸結合用ネジ孔を構成する場合、操作用大舌片の切り起こし跡の貫通孔を利用するのであるから、ネジ孔のための貫通孔を操作用大舌片の切り起こしとは別に設ける場合と比較して、金型が簡単になり、加工コストを下げることが出来る。この場合、請求項４に記載の構成によれば、前記ナットが溶接によらずに所定位置に固定されるので、製造コストの一層の低減を図ることが出来る。
【００３９】
更に、請求項５に記載の構成によれば、本発明の螺軸固定構造を活用して、安価に製造することが出来るものでありながら安全に利用出来る土留め壁用コンクリート型枠連結具を提供出来る。この場合、請求項６〜８に記載の構成を採用することにより、請求項２〜４に記載の構成を採用したときに得られる作用効果を土留め壁用コンクリート型枠連結具に於いて得ることが出来る。
【００４０】
又、請求項９に記載の構成によれば、螺軸部を利用して土留め壁への連結を図ることの出来る連結具を簡単に構成することが出来る。この場合、請求項１０に記載の構成によれば、溶接によらずに前記螺軸部を備えた連結具を構成することが出来、製造コストの一層の低減を図ることが出来る。
【００４１】
又、請求項１１に記載の構成によれば、主として木製の矢板を使用して構成された土留め壁に対し釘やネジで簡単に取り付けることが出来る連結具を極めてシンプル且つ安価に構成することが出来る。
【００４２】
又、請求項１２に記載の構成によれば、貫通孔を開けることが出来る主として木製の矢板を使用して構成された土留め壁に対し簡単にしかも楔効果で強力に取り付けることが出来る連結具を得ることが出来る。
【００４３】
更に、請求項１３に記載の構成によれば、土留め壁を構成する矢板支持用Ｈ形鋼のフランジ部に引っ掛けるだけで簡単に取り付けることが出来る連結具を得ることが出来る。
【図面の簡単な説明】
【図１】Ａ図は第１実施形態の連結具を示す側面図であり、Ｂ図は同平面図である。
【図２】第１実施形態の連結具の要部を示す図であって、Ａ図は操作用大舌片を示す位置での縦断側面図であり、Ｂ図は係止用小舌片を示す位置での縦断側面図であり、Ｃ図は使用状態を示す縦断側面図である。
【図３】第１実施形態の連結具のセパレーター連結部側の端面図である。
【図４】第１実施形態の連結具の使用状態を示す一部縦断側面図である。
【図５】第２実施形態の連結具を示す図であって、Ａ図は側面図であり、Ｂ図は平面図であり、Ｃ図は右側面図である。
【図６】第３実施形態の連結具を示す図であって、Ａ図は使用状態を仮想線で示す側面図であり、Ｂ図は使用状態を仮想線で示す平面図である。
【図７】第４実施形態の連結具を示す図であって、Ａ図は使用状態を仮想線で示す側面図であり、Ｂ図は使用状態を仮想線で示す一部横断平面図である。
【符号の説明】
１，２６，３１，４１連結具
２本体
３，２７，３２，４２土留め壁への連結部
４セパレーター連結部
５本体のコ字形帯状板
６コ字形帯状板の折り返し端部
７ネジ孔
８操作用大舌片
８ａ操作用大舌片の先端
８ｂ操作用大舌片の中間屈曲部
９係止用小舌片
９ａ係止用小舌片の小巾先端
９ｂ係止用小舌片の巾広基部
１０貫通孔
１１ナット
１２ａ〜１３ｂ突部
１４螺軸部
１５ボルト
１６止着具
１７土留め壁
１８矢板支持用Ｈ形鋼
１８ａ矢板支持用Ｈ形のフランジ部
１９矢板
２１ネジ孔付き部材
２２セパレーター
２２ａセパレーターの一端螺軸部
２３コンクリート型枠
２８ａ，２８ｂ取付板部
２９取付孔
３３矢板の貫通孔
３４差込み部
３６係止片
３７楔係止部
３８楔板
４３鉤状部
４４弾性係止片[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a screw fixing structure that can be used for various applications, and a concrete form linking device for a retaining wall that adopts the screw fixing structure.
[0002]
[Prior art]
For example, when a concrete wall is to be constructed between a standing sheet pile supporting H-section steel and a retaining wall formed by dropping a required number of sheet piles, a required interval is provided between the retaining wall and the retaining wall. Concrete formwork must be temporarily installed. At this time, a screw shaft fixing structure for connecting the other end of the separator (screw shaft) having one end connected to the concrete form to an appropriate portion of the retaining wall is required. As described in Patent Literature 1, an operation large tongue piece is formed by fixing and connecting a band-shaped plate outside one end of a cylindrical body having a screw hole for connecting a separator at one end. At the intermediate position of the operating tongue piece, a locking tongue piece whose tip is directed toward the screw hole is cut and raised, and the operating tongue piece is formed on both left and right sides of the base of the locking tongue piece. Notches are formed on both sides, and when an operating force in the axial direction of the screw hole is applied to the tip of the operating tongue, the operating tongue is bent at the position of the notch. The part from the tip of the large tongue for operation to the tip of the small tongue for locking is tilted integrally, and the tip of the small tongue for locking is It was configured to bite into the screw shaft portion of the screwed separator serial screw hole.
[0003]
[Patent Document 1]
JP-A-8-303005
[0004]
[Problems to be solved by the invention]
In the screw shaft fixing structure used in the conventional concrete form linking device for the retaining wall as described above, the band-shaped plate constituting the operating tongue piece is fixed to the cylindrical body serving as the connecting member body by welding or the like. Not only must it be continuously provided, but the large tongue for operation requires cutting and raising of the small tongue for locking and processing of a pair of cutouts on the left and right sides, resulting in high processing costs, If the operating tongue piece (band-shaped plate) is not sufficiently strong, the operating tongue piece is detached from the connector main body when an operating force is applied to the operating tongue piece with a hammer or the like, and becomes unusable. I was afraid.
[0005]
[Means for Solving the Problems]
An object of the present invention is to provide a concrete form coupler for an earth retaining wall capable of solving the conventional problems as described above, and to provide a screw shaft fixing structure that can be utilized for various other uses. The main means 2 having a screw hole 7 and a screw shaft (an end of the separator 22) which is screwed and connected to the screw hole 7 are shown. A screw shaft fixing structure comprising a screw shaft portion 22a), and an operation large tongue piece 8 cut and raised in the main body 2 and a locking and cutout formed in the operation large tongue piece 8 A small tongue piece 9, the operation large tongue piece 8 is cut and raised so that a tip protrudes in a direction away from the screw hole 7, and the locking small tongue piece 9 is attached to the operation large tongue piece 8. Cut and raised in the opposite direction and the width of the base is wider than the width of the tip When an operating force is applied to the tip 8a of the operating tongue piece 8 in the direction of the axis 7a of the screw hole 7, the operating tongue piece 8 is held on both sides of the wide base 9b of the locking small tongue piece 9. Is bent, and the portion from the tip 8a of the large tongue 8 for operation to the tip 9a of the small tongue 9 for locking is tilted integrally, and the tip 9a of the small tongue 9 for locking is attached to the screw shaft (separator 22). Has one end biting into the screw groove of the screw shaft portion 22a).
[0006]
When the present invention having the above-described configuration is implemented, the operation large tongue piece 8 is formed in a V-shape in which a portion from an intermediate position to a tip bends away from the axis 7a of the screw hole 7, and The small tongue piece 9 for stop has a wide base 9b disposed closer to the distal end 8a than the middle bent portion 8b of the large tongue piece 8 for operation. 8 can be formed to protrude inside.
[0007]
The main body 2 is provided with a U-shaped band-shaped plate 5 turned back on the screw hole 7 side, and the screw hole 7 is provided with a large operating hole formed in a turned-up end 6 of the U-shaped band-shaped plate 5. It can be constituted by a through-hole 10 of the cut and raised trace of the tongue piece 8 and a nut 11 fixed inside the folded end portion 6 of the U-shaped strip 5. In this case, the nut 11 is non-rotatably sandwiched between the U-shaped strips 5, and the protrusions 12a and 12b formed so as to protrude inward from the U-shaped strip 5 by pressing. It is desirable to clamp and fix the folded end portion 6 of the V-shaped strip 5 without welding.
[0008]
The present invention also provides a concrete form connector for a retaining wall to which the above-mentioned screw shaft fixing structure is applied. That is, the concrete form connecting device for retaining wall according to the present invention is the connecting device 1 in which the connecting portion 3 to the retaining wall is provided at one end of the main body 2 and the separator connecting portion 4 is provided at the other end. The main body 2 includes a U-shaped band-shaped plate 5 folded on the separator connecting portion 4 side, and the separator connecting portion 4 includes a screw hole 7 provided in a folded end portion 6 of the U-shaped band-shaped plate 5 of the main body 2. An operating large tongue piece 8 cut and raised on the U-shaped band-shaped plate 5 and a locking small tongue piece 9 formed and raised in the operation large tongue piece 8. The piece 8 is cut and raised so that the tip protrudes in a direction away from the screw hole 7, and the locking small tongue piece 9 is oriented in the opposite direction to the operation large tongue piece 8 and has a base portion smaller than the width of the tip. The tip 8 of the operation large tongue piece 8 is cut and raised into a shape having a wide width. When an operating force is applied in the direction of the axis 7a of the screw hole 7, the large tongue piece 8 is bent on both sides of the wide base 9b of the small tongue piece 9 for locking, so that the large tongue for operation A portion from the tip 8a of the piece 8 to the tip 9a of the locking tongue piece 9 is configured to be integrally tilted.
[0009]
In the concrete form linking device for retaining wall according to the present invention having the above-described structure, as described above, the operation large tongue piece 8 is provided on one side of the folded end portion 6 of the U-shaped band-shaped plate 5. The small tongue piece 9 for locking is formed in a V-shape which is bent from the corner part and the part from the middle position to the tip is away from the axis 7a of the screw hole 7. 8, a wide base 9b is disposed closer to the distal end 8a than the middle bent portion 8b, and the narrow width end 9a can be formed so as to protrude toward the screw hole 7 inside the large tongue piece 8 for operation. .
[0010]
The screw hole 7 has a through hole 10 formed at the folded end portion 6 of the U-shaped band plate 5 for cutting and raising a large tongue piece 8 for operation, and a folded end portion 6 of the U-shaped band plate 5. And a nut 11 fixed to the inside. In this case, the nut 11 is non-rotatably sandwiched between the U-shaped strips 5, and the protrusions 12a and 12b formed so as to protrude inward from the U-shaped strip 5 by pressing. It is desirable to clamp and fix the folded end portion 6 of the V-shaped strip 5 without welding.
[0011]
The connecting portion 3 to the earth retaining wall of the main body 2 can be constituted by a screw shaft portion 14 which is fixedly held between the free ends of the U-shaped strip 5 and protrudes from the U-shaped strip 5. In this case, on the earth retaining wall 17 side, for example, a member 21 having a screw hole capable of screwing the screw shaft portion 14 to an appropriate portion of an H-section steel 18 for sheet pile support or a steel sheet pile 19 is welded or the like. Installed with. When the connecting portion 3 to the earth retaining wall composed of the screw shaft portion 14 is adopted, the head portion 15a of the screw shaft portion 14 cannot be rotated without welding between the free ends of the U-shaped band-shaped plate 5 due to welding. It is desirable to use the bolt 15 pinched and fixed to the boss.
[0012]
In order to connect the retaining wall 17 to the wooden sheet pile 19 or the like, the connecting portion 27 of the main body 2 to the retaining wall is configured to connect the free end of the U-shaped strip 5 outward. It is composed of a pair of bent mounting plate portions 28a, 28b and mounting holes 29 provided in the mounting plate portions 28a, 28b. It can be configured to be nailed or screwed.
[0013]
In the case of a wooden sheet pile 19 or the like capable of forming the through hole 33, the connecting portion 32 to the retaining wall of the main body 2 is provided on the free end side of the U-shaped strip 5 and provided on the sheet pile 19. An insertion portion 34 into the through-hole 33, a locking piece 36 pivotally supported at the tip of the insertion portion 34 so as to be switchable between an insertion posture parallel to the insertion portion 34 and a retaining posture orthogonal to the insertion portion 34, It is composed of a wedge locking portion 37 provided in the insertion portion 34 and a wedge plate 38 which is inserted into the wedge locking portion 37 and fixes the sheet pile 19 between the locking piece 36 in the retaining position. I can do it.
[0014]
Further, in the case where it is possible to easily connect to the sheet pile supporting H-section steel 18 without using welding or the like, the connecting portion 42 of the main body 2 to the retaining wall is a free end of the U-shaped band-shaped plate 5. A hook-shaped portion 43 hooked on the flange portion 18a of the sheet pile supporting H-shaped steel 18 connected to the side, and an elastic locking piece 44 for holding the H-shaped steel flange portion 18a between the hook-shaped portion 43 and the hook-shaped portion 43. And it can be composed of
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
A preferred embodiment in which the screw fixing structure according to the present invention is applied to a concrete form connecting device for a retaining wall will be described below with reference to the accompanying drawings. In FIGS. The main body 2 includes a main body 2, a connecting portion 3 to an earth retaining wall provided at one end of the main body 2, and a separator connecting portion 4 provided at the other end of the main body 2.
[0016]
The main body 2 includes a U-shaped band-shaped plate 5 folded on the separator connecting portion 4 side. The separator connecting portion 4 includes a screw hole 7 provided at a folded end portion 6 of the U-shaped band-shaped plate 5, An operating large tongue piece 8 cut and raised at the folded end portion 5 of the band-shaped plate 5 and a locking small tongue piece 9 formed and cut in the operation large tongue piece 8.
[0017]
The operating large tongue piece 8 is erected from a corner on one side of the folded end 6 of the U-shaped band-shaped plate 5, and a portion from an intermediate position to a tip 8 a is away from an axis 7 a of the screw hole 7. The engaging small tongue piece 9 is bent and bent in a trapezoidal shape in which the width of the base 9b is wider than that of the tip 9a. A wide base 9b is disposed on the distal end 8a side of the middle bent portion 8b of the operation large tongue piece 8 and the small width end 9a is directed toward the screw hole 7. Is formed so as to protrude inside.
[0018]
The screw hole 7 has a through hole 10 formed at the folded end portion 6 of the U-shaped band-shaped plate 5 for cutting and raising the large tongue piece 8 for operation and the inside of the folded end 6 of the U-shaped band-shaped plate 5. And a nut 11 fixed to the nut. The nut 11 can be fixed to the inside of the folded end portion 6 of the U-shaped strip 5 by welding. In this embodiment, a square nut 11 such as a hexagon is used. The protruding portions 12a, 12b formed so as to be non-rotatably sandwiched between the side plates 5a, 5b of the U-shaped band plate 5 and projecting inward from the side plates 5a, 5b by press working, and the U-shaped band plate 5 Is fixed without being welded to the folded-back end 6. 13a and 13b are protrusions formed on both sides of the folded end portion 6 of the U-shaped band-shaped plate 5 so as to protrude inward by pressing in order to position the nut 11 therebetween. It prevents movement between the plates 5a and 5b in the lateral direction.
[0019]
Various types of connecting portions 3 to the retaining wall of the main body 2 are conceivable. In this embodiment, the connecting portions 3 are sandwiched and fixed between the free ends of the U-shaped belt-shaped plates 5 and are separated from the U-shaped belt-shaped plates 5. It is composed of a projecting screw shaft portion 14. As the screw shaft portion 14, a screw shaft having the same diameter over the entire length without a head can be used, and the means for fixing the screw shaft portion 14 to the free end of the U-shaped band-shaped plate 5 can also be welded. In this embodiment, a hexagonal or other rectangular head 15a is non-rotatably pinched and fixed between the free ends of the U-shaped band-shaped plate 5 without welding. The bolt 15 is used. In this case, both side plates 5a and 5b at the free end of the U-shaped band-like plate 5 are narrowed so as to hold the head 15a of the bolt 15 and the shaft, that is, the screw shaft 14, from both sides. The two side plates 5a and 5b are fixed to each other at the wing portions 5c and 5d projecting on both sides of the screw shaft portion 14 by fastening members 16 such as rivets.
[0020]
As shown in FIG. 4, as is well known in the art, the retaining wall 17 is formed by dropping a required number of sheet piles 19 between sheet pile supporting H-section steels 18 erected at appropriate intervals, and the sheet piles 19 are vertically adjacent to each other. A wall for earth retaining is formed, and in order to use the connecting tool 1 having the above structure, the outside of the flange portion 18a on the concrete wall construction side (opposite side of the mountain side) of the sheet pile supporting H-section steel 18 is used. A member provided with a screw hole into which the screw shaft portion 14 of the connecting tool 1 can be screwed at an appropriate position on the side surface, specifically, a member 21 having a nut 20 fixed inside is fixed by welding. The screw shaft portion 14 of the connector 1 is screwed and fastened to the nut 20 (screw hole) of the member 21, and the screw shaft portion 22 a of one end of the separator 22 adjusted to the required length is connected as shown in FIGS. 2A and 2B. The screw 1 is screwed into the screw hole 7 (the screw hole of the nut 11) in the separator connecting portion 4 of the tool 1.
[0021]
When one end of the screw shaft portion 22a of the separator 22 is screwed into the screw hole 7 of the connector 1 (the screw hole of the nut 11), the locking tongue piece 9 located on the lateral side outside the screw hole 7 is attached to the separator. One end of 22 is configured not to be in contact with the screw shaft portion 22a, but even in a situation where both are in contact, the locking tongue piece 9 is inclined in the screwing direction of the separator 22, so that the separator In a state where the locking tongue piece 9 is pressed and deformed outward at 22, the separator 22 can be screwed forward without any problem.
[0022]
When the screw 8 is screwed into the screw hole 7 of the connector 1 to a required depth as described above, as shown in FIG. 2C, the distal end 8a of the operation large tongue piece 8 is screwed in the screwing direction of the separator 22 (in the screw hole 7). An operating force F is applied by hitting with a hammer or other appropriate tool or material in the axial direction). As a result, the operation large tongue piece 8 is bent in the direction of the operation force F. The fulcrum of the bending is the lowest bending strength in the entire region up to the tip 8a of the operation large tongue piece 8. The locations, that is, the narrowest portions 8c and 8d on the left and right sides of the wide base 9b of the locking tongue piece 9 shown in FIG. Therefore, the portion between the distal end 8a of the large tongue piece 8 for operation and the distal end 9a of the small tongue piece 9 for locking is tilted integrally with the points 8c and 8d as fulcrums, and as shown in FIG. The tip 9a of the small tongue piece 9 moves toward the separator 22 side, bites into the thread groove of the one end screw portion 22a of the separator 22, and locks the separator 22 to the connector 1.
[0023]
As is well known in the art, the concrete form 23 is connected to the other end of the separator 22 by, for example, a form receiving cone 24 connected to the other end of the separator 22 or the separator 22 (the cone 24) outside the form 23. This is performed using a formwork fastener 25 or the like that is connected to a screw shaft portion protruding from the shaft.
[0024]
FIG. 4 shows a connector 26 according to the second embodiment. In this connecting tool 26, the separator connecting part 4 at one end of the main body 2 is the same as the connecting tool 1 of the first embodiment, and the connecting part 3 to the earth retaining wall at the other end of the main body 2 is different. . That is, the connecting portion 27 to the earth retaining wall in the connecting tool 26 is formed by bending the free ends of both side plates 5a and 5b of the U-shaped band-shaped plate 5 constituting the main body 2 outwardly. , And a plurality of mounting holes 29 provided in each of the mounting plate portions 28a and 28b. Reference numeral 30 denotes a reinforcing rib integrally formed by press working at a corner portion between the side plates 5a and 5b of the U-shaped band-shaped plate 5 and the mounting plate portions 28a and 28b.
[0025]
The connecting member 26 is used when the sheet pile 19 of the retaining wall 17 shown in FIG. 4 is mainly made of wood. The connecting member 26 is attached to an appropriate portion of the sheet pile 19 by a pair of mounting plate portions 28a and 28b. By using the mounting holes 29 of the above, it is possible to fix and use with appropriate fasteners such as nails and screws. The method of attaching the concrete form 23 to the connecting member 26 via the separator 22 is the same as that of the connecting member 1 shown in the previous embodiment.
[0026]
In the connecting tool 31 of the third embodiment shown in FIG. 6, the separator connecting portion 4 at one end of the main body 2 is the same as the connecting tool 1 of the first embodiment, and is connected to the retaining wall at the other end of the main body 2. Are different. That is, the connecting portion 32 of the connecting tool 31 to the earth retaining wall is connected to the free end side of the U-shaped band-shaped plate 5 and is inserted into a through hole 33 provided in the sheet pile 19; A locking piece 36 pivotally supported by a support shaft 35 at the tip of the insertion portion 34 so as to be freely switchable between an insertion position parallel to the insertion portion 34 and a retaining position orthogonal to the insertion portion 34, and a wedge provided on the insertion portion 34 It comprises a locking portion 37 and a wedge plate 38 which is inserted into the wedge locking portion 37 and fixes the sheet pile 19 between the locking piece 36 in the retaining position.
[0027]
The insertion portion 34 is constituted by a band-shaped plate 40 having one end portion sandwiched between both side plates 5a and 5b of the U-shaped band-shaped plate 5 and fixed with a fastener 39 such as a rivet. A band-shaped plate having the same width as or slightly narrower than the band-shaped plate 40 is bent into a U-shape. The state in which the folded end portion 36a of the locking piece 36 is positioned outside the free end of the band-shaped plate 40 is configured to be the insertion posture. Further, the wedge locking portion 37 is constituted by a long hole 37a formed in the band-shaped plate 40 in parallel with its length direction. The outer end of this long hole 37a (the end farther from the locking piece 36) is arranged so as to be flush with the free ends of both side plates 5a and 5b of the U-shaped band-shaped plate 5.
[0028]
The insertion portion 34 may be configured by extending both side plates 5a and 5b of the U-shaped band-shaped plate 5. In this case, the locking piece 36 can be composed of a single thick plate that is loosely fitted between the side plates 5a and 5b of the U-shaped band-shaped plate 5 and is supported by the shaft. The wedge plate insertion gap formed between the two side plates 5a and 5b of the U-shaped band-shaped plate 5 and the oblique side of the wedge plate 38 inserted between the two side plates 5a and 5b on the far side from the locking piece 36 are stopped. It can be constituted by a receiving portion formed between both side plates 5a and 5b.
[0029]
When the connecting tool 31 having the above configuration is used, a through hole 33 having a diameter enough to allow the insertion portion 34 to penetrate the sheet pile 19 is formed in advance. Thus, the insertion portion 34 of the connecting tool 31 is inserted through the through hole 33 in a state where the locking piece 36 is inserted in parallel with the insertion portion 34, and the locking piece 36 is inserted outside the sheet pile 19. The posture is switched to the retaining posture orthogonal to the section 34. At this time, due to the positional relationship between the center of gravity of the locking piece 36 and the support shaft 35, the locking piece 36 protruding outward from the through hole 33 of the sheet pile 19 is naturally rotated by 90 degrees around the support shaft 35 by gravity. It is desirable to switch to the retaining position, or to bias the locking piece 36 with a spring so as to be held in the retaining position.
[0030]
When the insertion portion 34 of the connecting tool 31 is inserted into the through hole 33 of the sheet pile 19 and the locking piece 36 is switched to the retaining position, the wedge plate 38 is pressed into the wedge locking portion 37 (the long hole 37a). One end (insertion portion 34) of the main body 2 is fixed at right angles to the sheet pile 19 by the wedge plate 38 and the locking piece 36 in the retaining position, and thereafter, the connecting tool 1 of the first embodiment shown in FIG. Similarly, the concrete form 23 may be connected to the separator connecting portion 4 of the connecting tool 31 via the separator 22.
[0031]
In the connecting tool 41 of the third embodiment shown in FIG. 7, the separator connecting portion 4 at one end of the main body 2 is the same as the connecting tool 1 of the first embodiment, and is connected to the retaining wall at the other end of the main body 2. Are different. That is, the connecting portion 42 of the connecting tool 41 to the earth retaining wall is formed by a flange portion of the H-shaped steel 18 for sheet pile support (see FIG. 4) continuously provided on the free end side of the U-shaped band-shaped plate 5. The hook-shaped portion 43 is hooked on the hook 18a, and the hook-shaped portion 43 has an elastic locking piece 44 for holding the H-shaped steel flange portion 18a therebetween.
[0032]
More specifically, at the free end of the U-shaped band-shaped plate 5, both side plates 5a and 5b are each formed into a semicircular cross-section, and the two are joined together to form a cylindrical portion 45. Is formed by press-molding a single metal plate, and has a tip portion 43a extending laterally at right angles to the connecting member main body 2, and a free end cylindrical portion 45 of the U-shaped band-shaped plate 5 at a base portion. Is formed, and a convex portion 44a formed at the base of the elastic locking piece 44 fits inside the outwardly protruding portion 43c formed at the bottom of the U-shaped portion 43b. A cross section of the free-end cylindrical portion 45 and the hook-shaped portion 43 of the U-shaped band-shaped plate 5 in a state where the base of the elastic locking piece 44 is sandwiched between the free-end cylindrical portion 45 of the U-shaped band-shaped plate 5. The U-shaped portion 43b is fixed with a fastener 46 such as a rivet. The hook-shaped portion 43 is formed with a rib 43d which is continuous from the U-shaped section 43b to the end of the tip portion 43a and protrudes outward. The elastic locking piece 44 includes a locking portion 44b that projects obliquely inward from a position inside the end of the tip 43a of the hook 43 toward the tip 43a of the hook 43.
[0033]
The connecting tool 41 has a hook-like portion 43 with respect to the flange portion 18a of the sheet pile supporting H-section steel 18 (see FIG. 4), and the flange portion 18a and the distal end portion 43a of the hook-like portion 43 have elastic locking pieces. The engaging portion 44b is engaged with the engaging portion 44b of the elastic member 44 so as to enter against the elasticity of the elastic engaging piece 44, and is held substantially perpendicular to the flange portion 18a. Thereafter, the concrete form 23 may be connected to the separator connecting part 4 of the connecting tool 41 via the separator 22 in the same manner as the connecting tool 1 of the first embodiment shown in FIG.
[0034]
The hook-shaped portion 43 of the connecting tool 41 may be formed integrally with the U-shaped strip 5 by forming the free end of the U-shaped strip 5. Further, the connecting portion to the earth retaining wall provided in the connecting member main body 2 of the present invention is not limited to the connecting portions 3, 27, 32, and 42 of each of the above-described embodiments. The configuration of the conventionally known connecting portion as shown in the figure can also be adopted.
[0035]
The above embodiments are examples in which the screw fixing structure of the present invention is applied to a concrete formwork connecting device for a retaining wall, but the present invention is not limited to the concrete formwork connecting device for a retaining wall. It can be applied as various screw shaft fixing structures, that is, a screw shaft fixing means which is screwed into a screw hole of the main body. For example, a turnbuckle-type brace is composed of a connector body with a screw hole and two connecting rods screwed to the body. The invention can be applied. Further, the present invention can be used not only as a connecting tool for connecting two members with a screw, but also as a fixing means for a screw shaft for a screw-type clamp, for example.
[0036]
【The invention's effect】
According to the screw shaft fixing structure of the present invention which can be implemented and used as described above, the screw hole is screwed into the screw hole of the main body in a state where the screw shaft is screwed in a required amount by a predetermined amount. An operating force is applied in the axial direction of the tongue, thereby deforming the locking small tongue piece cut and raised in the operating large tongue piece so that its tip bites into the screw groove of the screw shaft. The screw shaft can be fixed to the main body by biting the tip of the locking tongue piece into the screw shaft screw groove. In particular, according to the configuration of the present invention, the locking tongue is attached to the main body. The operation large tongue piece provided with a piece is cut and raised integrally, and compared with the conventional operation in which another member constituting the operation large tongue piece is fixed by welding or the like, the operation large tongue piece is formed. When the operating force is applied to the tongue by a hammer or the like, the operation tongue may come off unexpectedly. This eliminates the risk of inconvenience and cuts the locking tongue into a shape in which the width of the base is wider than the width of the tip. Even when the locking tongue is not provided, the position of the wide base of the locking tongue must always be determined by the presence of the weak bending portions of the operating large tongue disposed on both sides of the wide base of the locking tongue. Thus, the large tongue for operation is bent and deformed, and the small tongue for locking is surely deformed as expected, so that the fixing action of the screw shaft can be accurately exhibited.
[0037]
According to the second aspect of the present invention, the large tongue for operation is bent in a V shape, and the position of the wide base of the small tongue for locking, in other words, the bending fulcrum of the large tongue for operation. Position can be made closer to the axis of the screw hole (the axis of the screw shaft), so the length of the small tongue for locking is reduced, and the small tongue for operation is slightly bent and deformed for locking. The tip of the small tongue piece is securely bite into the screw groove of the screw shaft, and a strong screw shaft fixing effect can be obtained.
[0038]
According to the third aspect of the present invention, when the screw hole for connecting the screw shaft is formed at the end of the main body by using the nut, the through-hole of the cut and raised trace of the operating tongue piece is used. Therefore, as compared with the case where the through hole for the screw hole is provided separately from the cutting and raising of the operation tongue piece, the mold is simplified and the processing cost can be reduced. In this case, according to the configuration described in claim 4, since the nut is fixed at a predetermined position without welding, the manufacturing cost can be further reduced.
[0039]
Further, according to the configuration of the fifth aspect, the concrete form connecting device for a retaining wall that can be manufactured at a low cost and can be used safely by utilizing the screw fixing structure of the present invention. Can be provided. In this case, by adopting the configuration according to the sixth to eighth aspects, the operation and effect obtained when the configuration according to the second to fourth aspects is adopted can be obtained in the concrete form linking device for a retaining wall. I can do it.
[0040]
Further, according to the configuration of the ninth aspect, it is possible to easily configure a connecting tool that can be connected to the earth retaining wall using the screw shaft portion. In this case, according to the configuration of the tenth aspect, it is possible to configure the connecting tool having the screw shaft portion without welding, and it is possible to further reduce the manufacturing cost.
[0041]
Further, according to the configuration of the eleventh aspect, a connecting tool that can be easily attached with a nail or a screw to a retaining wall mainly formed using a wooden sheet pile is extremely simple and inexpensive. Can be done.
[0042]
Further, according to the structure of the twelfth aspect, a connecting tool which can be easily and strongly attached to a retaining wall mainly formed by using a wooden sheet pile, through which a through hole can be formed, with a wedge effect. Can be obtained.
[0043]
Further, according to the configuration of the thirteenth aspect, it is possible to obtain a connecting tool that can be easily attached simply by being hooked on the flange portion of the sheet pile supporting H-section steel constituting the retaining wall.
[Brief description of the drawings]
FIG. 1A is a side view showing a connector according to a first embodiment, and FIG. 1B is a plan view thereof.
FIG. 2 is a view showing a main part of the coupler of the first embodiment, wherein FIG. A is a longitudinal side view at a position showing a large tongue for operation, and FIG. It is a vertical side view in a position, and FIG. C is a vertical side view which shows a use state.
FIG. 3 is an end view of a connecting tool of the first embodiment on a separator connecting portion side.
FIG. 4 is a partially longitudinal side view showing a use state of the coupler of the first embodiment.
5A and 5B are views showing a connecting tool according to the second embodiment, wherein FIG. 5A is a side view, FIG. 5B is a plan view, and FIG. 5C is a right side view.
FIG. 6 is a view showing a connecting tool according to the third embodiment, wherein FIG. 6A is a side view showing a use state by a virtual line, and FIG. 6B is a plan view showing a use state by a virtual line.
FIG. 7 is a view showing a connecting tool according to a fourth embodiment, wherein FIG. 7A is a side view showing a use state by imaginary lines, and FIG. .
[Explanation of symbols]
1,26,31,41 Connecting tool
2 body
3,27,32,42 Connection to earth retaining wall
4 Separator connection
5 U-shaped strip of body
6 folded end of U-shaped strip
7 Screw hole
8 Large tongue for operation
8a Tip of large tongue for operation
8b Intermediate bend of operating large tongue
9 Locking small tongue
9a Narrow tip of locking tongue
9b Wide base of locking tongue piece
10 Through hole
11 nuts
12a-13b Projection
14 Screw shaft
15 volts
16 Fasteners
17 Earth retaining wall
18 H-section steel for sheet pile support
18a H-shaped flange for sheet pile support
19 Yaita
21 Screw holes
22 separator
22a Screw shaft part at one end of separator
23 Concrete formwork
28a, 28b Mounting plate
29 mounting holes
33 sheet pile through hole
34 insertion part
36 Locking piece
37 wedge locking part
38 wedge plate
43 Hook
44 Elastic locking piece

Claims

A fixing structure of a screw shaft screwed into a screw hole of a main body, the operation large tongue piece cut and raised in the main body, and the locking large cutout formed in the operation large tongue piece. A small tongue piece, the operation large tongue piece is cut and raised so that a tip protrudes in a direction away from the screw hole, and the locking small tongue piece is in an opposite direction to the operation large tongue piece. When the operating force is applied to the distal end of the large tongue piece in the axial direction of the screw hole, the width of the small tongue piece is widened. The operation large tongue is bent on both sides of the base, and a portion from the tip of the operation large tongue to the tip of the locking small tongue is tilted integrally, and the tip of the locking small tongue is screwed to the screw. A screw shaft fixing structure configured to bite into the screw groove of the shaft.

The operation large tongue piece is a V-shape in which a portion from an intermediate position to a tip is bent away from the axis of the screw hole, and the locking small tongue piece is the operation large tongue piece. The wide base portion is arranged on the distal end side from the middle bent portion of the above, and the narrow distal end is formed so as to protrude inside the operation large tongue piece toward the screw hole. Screw shaft fixing structure.

The main body includes a U-shaped band-shaped plate folded back on the screw hole side, and the screw hole is a through-hole of a cut-and-raised mark of an operating large tongue piece formed at a folded end of the U-shaped band-shaped plate, The screw shaft fixing structure according to claim 1, further comprising a nut fixed inside a folded end portion of the U-shaped band-shaped plate.

The nut is non-rotatably clamped between the U-shaped strips, and a protrusion formed to project inward from the U-shaped strip by press working and a folded end of the U-shaped strip. The screw shaft fixing structure according to claim 3, wherein the screw shaft fixing structure is held and fixed without welding.

A connection tool in which a connection part to an earth retaining wall is provided at one end of the main body and a separator connection part is provided at the other end, wherein the main body includes a U-shaped band-shaped plate folded on the separator connection part side, The connecting portion includes a screw hole provided at the folded end of the U-shaped band-shaped plate of the main body, an operation large tongue formed by cutting and raising the U-shaped band-shaped plate, and a cut-out inside the operation large tongue. The operating large tongue piece is cut and raised so that the tip protrudes in a direction away from the screw hole, and the locking small tongue piece is formed of the operating large tongue piece. When the operating force is applied to the distal end of the large tongue for operation in the axial direction of the screw hole, the engaging member is cut and raised so that the width of the base is wider than the width of the distal end. The operation tongue is bent on both sides of the wide base of the stop tongue. To the portion of the distal end of the operation for a large tongue to the tip of the locking small tongues it is configured to tilt together, earth retaining walls for concrete formwork coupling.

The operating tongue piece is formed in a U-shape that rises from a corner on one side of the folded end of the U-shaped band-shaped plate and that a portion from an intermediate position to a tip is bent away from the axis of the screw hole. The locking small tongue piece has a wide base arranged at a tip side from an intermediate bent portion of the operation large tongue piece, and a small width tip is directed toward the screw hole. The concrete formwork connecting device for retaining wall according to claim 5, wherein the connecting member is formed so as to protrude inward.

The screw hole is formed by a through hole of a cut-and-raised trace of the operating large tongue formed at the folded end of the U-shaped strip, and a nut fixed inside the folded end of the U-shaped strip. The concrete formwork connector for a retaining wall according to claim 5, which is configured.

The nut is non-rotatably clamped between the U-shaped strips, and a protrusion formed to project inward from the U-shaped strip by press working and a folded end of the U-shaped strip. The concrete formwork connector for a retaining wall according to claim 7, wherein the concrete formwork connector for a retaining wall is sandwiched and fixed without welding therebetween.

The connecting portion of the main body to the retaining wall includes a screw shaft portion fixed between the free ends of the U-shaped band-shaped plate and protruding from the U-shaped band-shaped plate. The concrete formwork coupling for a retaining wall according to the present invention.

10. The retaining wall according to claim 9, wherein a bolt whose head is non-rotatably pinched and fixed between the free ends of the U-shaped band-shaped plate without welding is used for the screw shaft portion. Concrete formwork coupler.

The connecting portion of the main body to the retaining wall is formed by a pair of mounting plate portions formed by bending a free end of the U-shaped band plate outward, and mounting holes provided in the mounting plate portion. The concrete formwork connector for a retaining wall according to any one of claims 5 to 8, which is configured.

The connecting portion of the main body to the retaining wall is connected to the free end side of the U-shaped band-shaped plate and is inserted into a through hole provided in the sheet pile, and is orthogonal to the inserting posture parallel to the inserted portion. A locking piece pivotally supported at the tip of the insertion portion so as to be switchable to a retaining position, a wedge locking portion provided on the insertion portion, The concrete formwork connecting device for a retaining wall according to any one of claims 5 to 8, comprising a wedge plate for fixing the sheet pile to the locking piece.

The connecting portion of the main body to the retaining wall is formed between a hook-shaped portion connected to the free end side of the U-shaped band-shaped plate and hooked on a flange portion of the H-shaped steel for sheet pile support, and the hook-shaped portion. The concrete formwork coupling for a retaining wall according to any one of claims 5 to 8, further comprising an elastic locking piece for clamping the H-shaped steel flange portion.