JPS5936608Y2 - Tightening unit for threaded reinforcing bars - Google Patents

Description

【考案の詳細な説明】 本考案は螺子節鉄筋継手の締付ユニットに関する。[Detailed explanation of the idea] The present invention relates to a tightening unit for a threaded reinforcing bar joint.

従来、軸上に一連の螺旋突条を具えた所謂螺子節鉄筋（
例えば特公昭４８−２５６４０号及び特開昭４８−３６
９３０号公報参照）の複数本を継管及びナツトで繋ぎ、
コンクリート構造物の補強鉄筋として使用している。Traditionally, so-called threaded reinforcement bars (
For example, Japanese Patent Publication No. 48-25640 and Japanese Patent Publication No. 48-36
(Refer to Publication No. 930) are connected with joint pipes and nuts,
It is used as reinforcing steel for concrete structures.

上記継管を締付けるため本出願人は以前に第６図、第７
図に示す様な締付ユニットを提案した。In order to tighten the above-mentioned joint pipe, the applicant had previously
We proposed a tightening unit as shown in the figure.

（実願昭５２−４４１４６）。(Jitsugan No. 52-44146).

該締付ユニットは、本体１に枢止したソケットギヤ２を
予め鉄筋９２に螺入したナツト９１に嵌め、本体１に設
けた反力受け５を継管９に係合し、本体１から突出した
入力歯車軸４を手動ハンドル９４で回転させ、ソケット
ギヤ２を駆動してナツト９１を締付ける。The tightening unit is constructed by fitting the socket gear 2 pivotally mounted on the main body 1 into a nut 91 screwed into a reinforcing bar 92 in advance, engaging the reaction force receiver 5 provided on the main body 1 with the joint pipe 9, and protruding from the main body 1. The input gear shaft 4 is rotated by the manual handle 94, the socket gear 2 is driven, and the nut 91 is tightened.

本体１は反力受け５を介して継管９に固定されるから締
付は反力によって本体１は回転しない利点がある。Since the main body 1 is fixed to the joint pipe 9 via the reaction force receiver 5, there is an advantage that the main body 1 does not rotate due to the reaction force during tightening.

ところが上記締付ユニットを手動ハンドルに換えてナツ
トランナー等の動力回転工具で駆動する場合、動力回転
工具自体は自らの締付は反力によって振れ回る危険があ
り、この優では駆動のために動力回転工具を使用するこ
とは出来ない。However, when replacing the above-mentioned tightening unit with a manual handle and driving it with a power rotating tool such as a nut runner, there is a danger that the power rotating tool itself will swing around due to the reaction force of its own tightening. Rotating tools cannot be used.

本考案はユニット本体の入力歯車軸と同心に、動力回転
工具の締付は反力を受ける筒体を設けることにより、動
力回転工具を安全に操作出来る螺子節鉄筋用締付ユニッ
トを提供するものである。The present invention provides a tightening unit for threaded reinforcing bars that can safely operate a power rotary tool by providing a cylindrical body concentric with the input gear shaft of the unit body that receives reaction force when tightening the power rotary tool. It is.

以下図面に示す実施例に基づき、本考案を具体的に説明
する。The present invention will be specifically described below based on embodiments shown in the drawings.

第１図、第２図は２本の螺子節鉄筋９２，９３を継管９
へ螺入し、予め各鉄筋９２．９３に螺合したナラ）９１
．９１を継管端面に手廻しで締付けた後、上記ナツト及
び継管に本考案に係る締付ユニット１９を係合し、該ユ
ニット１９をナツトランナー８等の動力回転工具で作動
させ、ナツトを締付ける状況を示している。In Figures 1 and 2, two threaded reinforcing bars 92 and 93 are connected to the joint pipe 9.
91) and screwed into each reinforcing bar 92 and 93 in advance.
．． 91 to the end face of the joint pipe by hand, the tightening unit 19 according to the present invention is engaged with the nut and the joint pipe, and the unit 19 is operated with a power rotating tool such as a nut runner 8 to tighten the nut. It shows the situation.

上記ナツトランナー８は公知の如くナツトランナ一本体
８１の先端は多角形の筒体８２に形威し、該筒体８２の
中心から駆動軸８３を突出させている。As is well known, the nut runner body 81 of the nut runner 8 has a polygonal cylindrical body 82 at its tip end, and a drive shaft 83 protrudes from the center of the cylindrical body 82.

ユニット本体１の両側壁ｌＬ１２は、下端から上方へ向
けて螺子節鉄筋の直径よりも幅広に切欠いて開口１３さ
れ、該開口１３の上端は半円状の円孔１４．１４に形成
されている。Both side walls lL12 of the unit body 1 are cut upward from the lower end to form an opening 13 wider than the diameter of the threaded reinforcing bar, and the upper end of the opening 13 is formed into a semicircular hole 14.14. .

ユニット本体１は両側壁及び筐体下部の開口から、螺子
節鉄筋を嵌め込むことが出来る。The unit main body 1 can be fitted with threaded reinforcing bars through the openings on both side walls and the lower part of the casing.

ユニット本体１の一方の側壁１１０円孔１４には、内径
が螺子節鉄筋９２の最大径より稍大きい半円状のストッ
パ１５を円弧に沿って突出させ、円孔１４周囲へ着脱可
能にネジ止めする。A semicircular stopper 15 whose inner diameter is slightly larger than the maximum diameter of the threaded reinforcing bar 92 is protruded from the circular hole 14 of one side wall 110 of the unit body 1 along an arc, and is removably screwed around the circular hole 14. do.

本体１の上部には把手１６を突設する。A handle 16 is provided protruding from the upper part of the main body 1.

ユニット本体１の内部には、側壁上の円孔１４゜１４と
同心にソケットギヤ２が回転自由に配備されている。Inside the unit body 1, a socket gear 2 is rotatably arranged concentrically with a circular hole 14°14 on the side wall.

該ソケットギヤ２は外周は歯面に形成され、内周面に歯
状のナツト係合溝２３を刻設した円筒体でであって両端
面には凸部２１．２１を環状に突設している。The socket gear 2 is a cylindrical body whose outer periphery is formed into a toothed surface and whose inner periphery is provided with a tooth-shaped nut engagement groove 23, and has annular projections 21 and 21 protruding from both end surfaces. ing.

該環状凸部２Ｌ２１を本体１の両側壁１１゜１２内面に
凹設した周溝１７，１７へ回転自由に嵌め、筒壁の一部
を本体１の開口１３に対応して切欠して開口２２する。The annular convex portion 2L21 is rotatably fitted into circumferential grooves 17, 17 recessed on the inner surfaces of both side walls 11 and 12 of the main body 1, and a part of the cylindrical wall is cut out corresponding to the opening 13 of the main body 1 to form the opening 22. do.

ユニット本体１０両側壁ｌＬ１２の上部に同一直線上に
円孔１０，１０を開設し、一方の孔１０へ長い筒体６、
他方の孔１０へ短い筒体６ａの夫々の基端を嵌め同一軸
上に配備する。Circular holes 10, 10 are opened on the same straight line in the upper part of both side walls lL12 of the unit body 10, and a long cylinder 6,
The respective proximal ends of the short cylindrical bodies 6a are fitted into the other hole 10 and arranged on the same axis.

各筒体６．６ａは基端側に突設した長方形のフランジ６
１．６１を側壁ｌＬ１２にネジ止めして固定されており
、先端部の内面にはナツトランナー８の多角形先端部を
係入する多角形孔６２が形成されれている。Each cylinder 6.6a has a rectangular flange 6 protruding from the base end side.
1.61 is screwed and fixed to the side wall LL12, and a polygonal hole 62 into which the polygonal tip of the nut runner 8 is inserted is formed on the inner surface of the tip.

各筒体６，６ａの基端部内面にベアリング６３を配備し
、ユニット本体１の上部に配備した入力歯車軸４の両端
の丸軸部４３．４３を軸承する。A bearing 63 is provided on the inner surface of the base end of each cylinder body 6, 6a, and supports round shaft portions 43, 43 at both ends of the input gear shaft 4 provided in the upper part of the unit main body 1.

該歯車軸４は前記ソケットギヤ２に噛合して減速歯車機
構を構成すると共に、長尺筒体６の丸軸部４３Ｕ該筒体
６の多角形孔６２の近傍１で延長し、軸心に貫通孔４１
を開設している。The gear shaft 4 meshes with the socket gear 2 to constitute a reduction gear mechanism, and extends in the vicinity 1 of the polygonal hole 62 of the long cylindrical body 6 at a round shaft portion 43U of the long cylindrical body 6, and has an axial center. Through hole 41
has been established.

上記貫通孔４１０両側開口端はナツトランナー８の駆動
軸８３と保合可能な多角形穴４２に形成され中央部は、
該多角形穴４２の最大径よりも僅か大径の真円に凹設さ
れている。The opening ends on both sides of the through hole 410 are formed into a polygonal hole 42 that can be fitted with the drive shaft 83 of the nut runner 8, and the central part is
It is recessed into a perfect circle with a slightly larger diameter than the maximum diameter of the polygonal hole 42.

上記貫通孔４１へ入力歯車軸４の全長よりも長い角軸４
４を摺動可能に嵌める。A square shaft 4 that is longer than the entire length of the input gear shaft 4 to the through hole 41
4 in a slidable manner.

角軸４４は軸心に貫通孔４５を開設し、該孔４５へ嵌め
たＶ字状のピン４６先端を角軸４４の略中央部に開設し
た縦孔から臨出させており、角軸４４はピン４６先端が
入力歯車軸４両側の多角形穴４２の内面当り部４７に当
る範囲で往復移動出来る。The square shaft 44 has a through hole 45 at its axis, and the tip of a V-shaped pin 46 fitted into the hole 45 protrudes from a vertical hole formed approximately at the center of the square shaft 44. can reciprocate within the range in which the tips of the pins 46 contact the inner surface abutting portions 47 of the polygonal holes 42 on both sides of the input gear shaft 4.

前記長尺筒体６には反力受け５が着脱可能に取付けられ
る。A reaction force receiver 5 is detachably attached to the elongated cylindrical body 6.

反力受け５は上部中央に筒体６の外径に対応する円孔５
２を開設し、下面に継管９の二面幅が係合する掛合溝５
１を下向きに開口しており、掛合溝５１の一方の側部に
は溝５１に貫通するクランプボルト５３を螺合している
。The reaction force receiver 5 has a circular hole 5 in the upper center corresponding to the outer diameter of the cylinder 6.
2, and the engaging groove 5 with which the width across flats of the joint pipe 9 engages with the lower surface.
1 is opened downward, and a clamp bolt 53 penetrating through the groove 51 is screwed into one side of the engaging groove 51.

反力受け５の上面には反力受け５の長尺筒体６へ係止す
る係止機構３が配備される。A locking mechanism 3 that locks onto the elongated cylindrical body 6 of the reaction force receiver 5 is provided on the upper surface of the reaction force receiver 5.

係止機構３は第４図に示す如く、中央に軸孔３２を有す
支持筒３１を反力受け５の上面に開設した孔５４へ嵌め
、支持筒３１の７ランジ３３を反力受けへボルト３４で
止める。As shown in FIG. 4, the locking mechanism 3 is constructed by fitting a support tube 31 having a shaft hole 32 in the center into a hole 54 formed on the top surface of the reaction force receiver 5, and inserting seven flange 33 of the support tube 31 into the reaction force receiver. Fasten with bolt 34.

上記支持筒３１の軸孔３２には、前記長尺筒体６の上面
に開設した切欠穴６４，６４．６４へ保合可能な係止ピ
ン３５を摺動可能に嵌め、支持筒３１の外周へ操作駒３
６を摺動及び回転可能に嵌める。A locking pin 35 that can be fitted into the notch holes 64, 64. to operation piece 3
6 is slidably and rotatably fitted.

係止ピン３５の上部に環状板３７を嵌めてスナップリン
グ３８で抜は止めを画ると共に、環状板３７の外周を操
作駒３６の内面段部３９に当てる。An annular plate 37 is fitted onto the upper part of the locking pin 35 and a snap ring 38 is used to prevent removal, and the outer periphery of the annular plate 37 is brought into contact with the inner step 39 of the operating piece 36.

支持筒３１の外周に嵌めたスナップリング３０と操作駒
３６との間にバネ２５を配備し、操作駒３６の蓋２６と
係止ピン３５の間に前記バネ２５よりも弱いバネ２７を
配備する。A spring 25 is provided between the snap ring 30 fitted on the outer periphery of the support tube 31 and the operating piece 36, and a spring 27 weaker than the spring 25 is provided between the lid 26 of the operating piece 36 and the locking pin 35. .

従って操作駒３６をバネ２５に抗して上方に持ち上げる
と操作＠１ｉ１３６の段部３９に当っている環状板３７
が係止ピン３５を上昇させ、該ピン３５と切欠穴６４と
の係合を解く。Therefore, when the operating piece 36 is lifted upward against the spring 25, the annular plate 37 hits the stepped portion 39 of the operating member @1i136.
raises the locking pin 35 and releases the engagement between the pin 35 and the cutout hole 64.

この状態で操作駒３６を回転させ該駒３６下端の複数箇
所から突設した当りフランジ２８をボルト３４の上面に
当てることにより係止ピン３５を上昇させた優の状態に
保持出来、反力受け５を軸方向に引っばれば筒体６から
抜き外すことが出来る。In this state, the locking pin 35 can be held in the raised state by rotating the operating piece 36 and applying the contact flanges 28 protruding from multiple locations on the lower end of the piece 36 to the upper surface of the bolt 34, thereby receiving the reaction force. By pulling 5 in the axial direction, it can be removed from the cylindrical body 6.

然して、締付ユニットの使用に際して、２本の螺子節鉄
筋９２．９３に予めナツ）９１．９１を螺合しておき、
鉄筋の端部を継管９の両端に螺入し、ナツト９１，９１
を手で締付は得る範囲で継管９の両端面に圧着させる。However, when using the tightening unit, screw the nuts) 91.91 onto the two threaded reinforcing bars 92.93 in advance.
Screw the ends of the reinforcing bars into both ends of the joint pipe 9, and tighten the nuts 91, 91.
Tighten them by hand to crimp them onto both end faces of the joint pipe 9.

この時、第１図に示す如く継管９とナツ）９１．９１の
位相は一致しないのが普通である。At this time, as shown in FIG. 1, the phases of the joint pipe 9 and the nuts 91 and 91 do not normally match.

反力受け５を長尺筒体６から外した状態の締付ユニット
本体１を、本体１の把手１６を持って或は本体１の両側
に突設した止めどン１８．１８にワイヤー２０を掛けて
吊りながら螺子節鉄筋９２上へ下降させ、本体１の開口
１３へ鉄筋９２を股って嵌め、次いでユニット本体１を
軸方向に移動してソケットギヤ２にナツト９１を係合さ
せる。Hold the tightening unit main body 1 with the reaction force receiver 5 removed from the long cylinder 6 by the handle 16 of the main body 1, or hang the wire 20 on the stoppers 18 and 18 protruding from both sides of the main body 1. The unit body 1 is lowered onto the threaded reinforcing bar 92 while being suspended, and the reinforcing bar 92 is fitted into the opening 13 of the main body 1, and then the unit main body 1 is moved in the axial direction to engage the nut 91 with the socket gear 2.

ナツト９１の端面がストッパー１５に当ればその位置が
正規の締付位置であってユニット本体１のソケットギヤ
２はナツト９１へ完全に係合し、継管９とは係合してい
ない。When the end surface of the nut 91 hits the stopper 15, that position is the normal tightening position, and the socket gear 2 of the unit body 1 is completely engaged with the nut 91, but not with the joint pipe 9.

第４図の２点鎖線に示す如く係止ピン３５を上昇させた
状態の反力受け５の掛合溝５１を継管９上へ嵌め、反力
受け５をユニット本体１側へ辷らせて、反力受け５の円
孔５２を長尺筒体６に嵌める。As shown by the two-dot chain line in FIG. 4, fit the engaging groove 51 of the reaction force receiver 5 onto the joint pipe 9 with the locking pin 35 raised, and let the reaction force receiver 5 slide toward the unit main body 1 side. , the circular hole 52 of the reaction force receiver 5 is fitted into the elongated cylindrical body 6.

ナツト９１と継管９の位相は一致していない場合が多い
から、ユニット本体１をソケットギヤ２を中心に多少回
転させ、筒体６と反力受け５の円孔５２中心を一致させ
て嵌める様にする。Since the phases of the nut 91 and the joint pipe 9 often do not match, rotate the unit body 1 a little around the socket gear 2, align the centers of the cylinder body 6 and the circular hole 52 of the reaction force receiver 5, and fit them. I'll do it like that.

反力受け５の操作駒３６を回転させて操作駒３６のフラ
ンジ２８をポルト３４上面から外し、係止ピン３５を筒
体６の切欠穴６４に嵌める。The operating piece 36 of the reaction force receiver 5 is rotated to remove the flange 28 of the operating piece 36 from the upper surface of the port 34, and the locking pin 35 is fitted into the notch hole 64 of the cylinder body 6.

切欠穴６４は複数開設されているからソケットギヤ２か
ら最適な間隔で反力受け５を＆ｈすることが出来る。Since a plurality of notch holes 64 are provided, the reaction force receiver 5 can be spaced from the socket gear 2 at an optimum distance.

反力受け５のクランプボルト５３を締め付け、継管９と
反力受け５を固定する。Tighten the clamp bolt 53 of the reaction force receiver 5 to fix the joint pipe 9 and the reaction force receiver 5.

次に入力歯車軸４の何れか一端へナツトランナー８の駆
動軸８３を係合し、ナツトランナーの多角形筒８２を筒
体６，６ａの多角形孔６２へ嵌めて、ナンドランナー８
を駆動し、入力歯車軸４を介してソケットギヤ２を減速
回転させ、ナツト９１を締付ける。Next, the drive shaft 83 of the nut runner 8 is engaged with one end of the input gear shaft 4, and the polygonal cylinder 82 of the nut runner is fitted into the polygonal hole 62 of the cylinder bodies 6, 6a.
is driven, the socket gear 2 is rotated at a reduced speed via the input gear shaft 4, and the nut 91 is tightened.

ナツトランナーに作用する締付は反力はユニット本体１
に固定した筒体６，６ａで受けるから、ランナ一本体８
１は回転することなく安全に操作出来る。The reaction force of tightening that acts on the nut runner is the unit body 1
Since it is received by the cylinders 6 and 6a fixed to the runner body 8,
1 can be operated safely without rotating.

又、入力歯車軸４へ嵌めた角軸４４は摺動可能であるか
ら、ナツトランナー８の反対側へ位置させておくことに
より、ナツトランナー８の保合の邪魔にならない。Further, since the square shaft 44 fitted to the input gear shaft 4 is slidable, by positioning it on the opposite side of the nut runner 8, it does not interfere with the locking of the nut runner 8.

ナツト９１は予め仮締めした位置から９００前後回転す
れば締付は完了となるので、ソケットギヤ２の開口２２
が１８００又は１回転することはない。Tightening is completed when the nut 91 rotates around 900 degrees from the pre-tightened position, so the opening 22 of the socket gear 2
never rotates 1800 or 1 revolution.

ナツトの締め付は反力及び締め切った機に生じる衝撃的
な反力は、ユニット本体１の筒体６に嵌合している反力
受け５が螺子節鉄筋を支えとして支持出来るから、継管
９に固定されたユニット本体１は回動せず、ナツト９１
は強固に締付けられるのである。The reaction force caused by tightening the nut and the impact reaction force generated by the tightened machine can be supported by the reaction force receiver 5 fitted into the cylinder body 6 of the unit body 1 using the threaded reinforcing bars as support, so the joint pipe The unit body 1 fixed to the nut 91 does not rotate.
is firmly tightened.

ナツト締付後は、反力受け５の係止機構３の係止ピン３
５と筒体６の切欠穴６４と係合を解いてユニット本体１
を継管９の反対側へ移動させ、螺子節鉄筋上へ股って支
えソケットギヤ２とナツト９１の係合を解く。After tightening the nut, the locking pin 3 of the locking mechanism 3 of the reaction force receiver 5
5 and the notch hole 64 of the cylindrical body 6 and disengage the unit body 1.
is moved to the opposite side of the joint pipe 9, crosses over the threaded reinforcing bar, and disengages the support socket gear 2 from the nut 91.

筒体６から突出した角軸４４の一端を手或はスパナで転
回出させ、入力歯車軸４を介してソケットギヤ２を前記
締付作業時とは反対側へ回転させて、ソケットギヤ２の
開口２２とユニット本体１の開口１３を揃える。Rotate one end of the square shaft 44 protruding from the cylindrical body 6 by hand or with a wrench, and rotate the socket gear 2 via the input gear shaft 4 in the opposite direction from the tightening operation. The opening 22 and the opening 13 of the unit body 1 are aligned.

上記状態でユニット本体１を持ち上げて鉄筋９２から外
す。In the above state, lift the unit main body 1 and remove it from the reinforcing bars 92.

締付ユニットを鉄筋９２から引離した時は、ソケットギ
ヤ２は作業開始時の状態にあるので締付ユニットを反転
させて対をなす他方のナツト９１の締付作業を行なうが
、反力受け５は継管９上にクランプボルト５３にて係止
された１１になっているので、ユニット本体１を対をな
す他方のナツト９１側から上記同様にセットし、今度は
反力受け５の円孔５２にユニット本体１の筒体６を差込
む様にする。When the tightening unit is pulled away from the reinforcing bar 92, the socket gear 2 is in the state at the start of work, so the tightening unit is reversed and the other paired nut 91 is tightened. Since 5 is 11 which is fixed on the joint pipe 9 with a clamp bolt 53, set the unit body 1 from the other nut 91 side of the pair in the same manner as above, and this time, attach the circle of the reaction force receiver 5. The cylinder body 6 of the unit body 1 is inserted into the hole 52.

この様にする事により一対のナツト９１を締付ける場合
の作業に於て作業能率が向上する。By doing this, the efficiency of the work when tightening the pair of nuts 91 is improved.

筒体６，６ａば２方向からナツトランナー８を係合可能
な様に２つ設けたが、一方を省略することも出来る。Although two cylindrical bodies 6, 6a are provided so that the nut runners 8 can be engaged from two directions, one of them may be omitted.

第５図は反力受け５を支持する受軸の他の実施例を示す
もので、前記長尺筒体６に補助筒７を嵌めて構成される
。FIG. 5 shows another embodiment of a bearing shaft that supports the reaction force receiver 5, and is constructed by fitting an auxiliary cylinder 7 into the elongated cylinder 6.

補助筒７は小径部７１と大径部７２を同一軸上に設けた
２段筒であって、小径部７１の外径と大径部７２の内径
は夫々長尺筒体６の外径に対応しており、大径部１２を
長尺筒体６に嵌めてネジ止め７３し、小径部７１に反力
受け５を嵌める。The auxiliary cylinder 7 is a two-stage cylinder in which a small diameter part 71 and a large diameter part 72 are provided on the same axis, and the outer diameter of the small diameter part 71 and the inner diameter of the large diameter part 72 are respectively equal to the outer diameter of the elongated cylinder 6. The large diameter portion 12 is fitted into the elongated cylindrical body 6 and screwed 73, and the reaction force receiver 5 is fitted into the small diameter portion 71.

上記の様に補助筒７を筒体６に嵌めて長くした場合、ソ
ケットギヤ２と反力受け５の距離を長く伸すことが出来
るから、継管９の両側のナツト９１．９１をソケットギ
ヤ２と反力受け５に係合させ、ソケットギヤ２の回転で
生ずる締付反力を他方のナツト９１に作用させ、１度の
締付は作業で両方のナラ）９１，９１の締付けが出来る
利点がある。When the auxiliary cylinder 7 is fitted into the cylinder body 6 as described above to make it longer, the distance between the socket gear 2 and the reaction force receiver 5 can be extended, so the nuts 91 and 91 on both sides of the joint pipe 9 can be connected to the socket gear. 2 and the reaction force receiver 5, the tightening reaction force generated by the rotation of the socket gear 2 is applied to the other nut 91, and both nuts 91, 91 can be tightened with one tightening operation. There are advantages.

但し、この作業時には反力受け５をセットした側のナツ
ト９１の回転角度だけユニット本体１も回転するので、
その回転による危険性の無い場合のみ能率向上に於て効
果大である。However, during this work, the unit body 1 also rotates by the rotation angle of the nut 91 on the side where the reaction force receiver 5 is set.
It is effective in improving efficiency only when there is no danger from the rotation.

本考案は上記の如く入力歯車軸４と同心に動力回転工具
の反力を受ける筒体６を突設したから、締付は作業中動
力回転工具が締付は反力によって回転する危険はない。As described above, in the present invention, the cylindrical body 6 that receives the reaction force of the power rotating tool is protruded concentrically with the input gear shaft 4, so there is no danger that the power rotating tool will rotate due to the reaction force during tightening. .

然もユニット本体１にはユニット本体１と継管９とを着
脱可能に固定する反力受け５を配備したから、ユニット
本体１に作用する締付は反力は継管９を固定点として支
持されユニット本体１が振れ回る虞れはなく安全に締付
は作業が出来、考案の目的を達するものである。Moreover, since the unit body 1 is equipped with a reaction force receiver 5 that removably fixes the unit body 1 and the joint pipe 9, the reaction force acting on the unit body 1 when tightening is supported by the joint pipe 9 as a fixing point. The tightening operation can be carried out safely without the risk of the unit body 1 swinging around, thus achieving the purpose of the invention.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は使用状態を示す斜面図、第２図は第１図ローロ
線に沿う断面図、第３図は一部破断した背面図、第４図
は係止機構の断面図、第５図は他の実施例を示す断面図
、第６図は従来例を示す斜面図、第７図は第６図Ｖｌ−
Ｖｌ線に沿う断面図である。 １・・・ユニット本体、２・・・ソケットギヤ、４・・
・入力歯車軸、５・・・反力受け、６・・・筒体。Figure 1 is a perspective view showing the state of use, Figure 2 is a sectional view taken along the Rolo line in Figure 1, Figure 3 is a partially broken rear view, Figure 4 is a sectional view of the locking mechanism, and Figure 5. 6 is a sectional view showing another embodiment, FIG. 6 is a perspective view showing a conventional example, and FIG. 7 is a sectional view showing another embodiment.
FIG. 3 is a cross-sectional view taken along the Vl line. 1...Unit body, 2...Socket gear, 4...
・Input gear shaft, 5... Reaction force receiver, 6... Cylindrical body.

Claims (1)

【実用新案登録請求の範囲】 ■ 下面に開口１３を具えたユニット本体１と、ユニッ
ト本体１の内部に回転可能に配備され内周面にナツト保
合溝２３、外周面に歯面を具え円周上の１箇所に螺子節
鉄筋を嵌め込む開口２２を開設したソケットギヤ２と、
ユニット本体１の上部に回転可能に配備され、前記ソケ
ットギヤ２と連繋して連動回転し端部には動力回転工具
の駆動軸８３を嵌める多角形穴４２を具えた入力歯車軸
４と、入力歯車軸４と同心にユニット本体１から突出し
端部に多角形孔６２を有する筒体６と、筒体６に着脱可
能に取付けられ下端に掛合溝５１を開設した反力受け５
とから構成された螺子節鉄筋用締付ユニット。 ■ 入力歯車軸４の多角形穴４２には角軸４４が摺動可
能に嵌められている実用新案登録請求の範囲第１項に記
載の螺子節鉄筋用締付ユニット。 ■ 筒体６には補助筒γを着脱可能に嵌めており、補助
筒７の先端に反力受け５を取付けている実用新案登録請
求の範囲第１項又は第２項に記載の螺子節鉄筋用締付ユ
ニット。[Scope of Claim for Utility Model Registration] ■ A unit body 1 having an opening 13 on the lower surface, a circular shape having a nut retaining groove 23 on the inner circumferential surface and a tooth surface on the outer circumferential surface, which is rotatably arranged inside the unit body 1. A socket gear 2 having an opening 22 in which a threaded reinforcing bar is inserted at one location on the circumference;
An input gear shaft 4 is rotatably disposed on the upper part of the unit body 1, rotates in conjunction with the socket gear 2, and has a polygonal hole 42 at its end into which a drive shaft 83 of a power rotary tool is fitted; A cylindrical body 6 protrudes from the unit body 1 concentrically with the gear shaft 4 and has a polygonal hole 62 at its end, and a reaction force receiver 5 that is detachably attached to the cylindrical body 6 and has an engaging groove 51 at its lower end.
A tightening unit for threaded reinforcing bars consisting of. (2) The tightening unit for threaded reinforcing bars according to claim 1, in which a square shaft 44 is slidably fitted into the polygonal hole 42 of the input gear shaft 4. ■ The threaded reinforcing bar according to claim 1 or 2 of the utility model registration claim, in which an auxiliary cylinder γ is removably fitted into the cylindrical body 6, and a reaction force receiver 5 is attached to the tip of the auxiliary cylinder 7. Tightening unit for use.