JP2678158B2 - Hollow PC steel rod tension device - Google Patents
Hollow PC steel rod tension deviceInfo
- Publication number
- JP2678158B2 JP2678158B2 JP29370494A JP29370494A JP2678158B2 JP 2678158 B2 JP2678158 B2 JP 2678158B2 JP 29370494 A JP29370494 A JP 29370494A JP 29370494 A JP29370494 A JP 29370494A JP 2678158 B2 JP2678158 B2 JP 2678158B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow
- rod
- steel rod
- rear end
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、中空ＰＣ鋼棒を用いて
コンクリート構造物またはコンクリート部材にプレテン
ション方式によりプレストレスを与えるための中空ＰＣ
鋼棒の緊張装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow PC for prestressing a concrete structure or a concrete member by a pretensioning method using a hollow PC steel rod.
The present invention relates to a steel rod tension device.
【０００２】[0002]
【従来の技術】従来、中空ＰＣ鋼棒の緊張装置として特
願平５−３０７０８７号がある。この緊張装置は押込み
用センターホールジャッキと緊張用治具が独立した別々
の構造となっている。2. Description of the Related Art Conventionally, there is Japanese Patent Application No. 5-307087 as a tensioning device for hollow PC steel rods. This tensioning device has a separate structure in which the pushing center hole jack and the tensioning jig are independent.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の場合は、中
空ＰＣ鋼棒の芯とセンターホールジャッキの芯合わせを
精度よく行うことは困難であり、芯合わせに長時間を要
した。また押込み用治具には遊びがあり、そのために定
着カップラー内の押込みコマが偏心あるいは回転して定
着カップラーに接触し、そのため定着カップラーの螺合
が困難であった。また装置全体の部品数が多いため全体
が重くなり、そのため装置全体の重量が重くなり、その
ため工事現場で持ち歩くとき、ＰＣ鋼棒の径が大きくな
ると、使用する鋼棒の緊張装置の重量が大きくなるの
で、不便であった。In the above conventional case, it is difficult to accurately align the core of the hollow PC steel rod and the center hole jack, and it takes a long time to perform the center alignment. Further, the pushing jig has some play, which causes the pushing top in the fixing coupler to eccentrically or rotate to come into contact with the fixing coupler, which makes it difficult to screw the fixing coupler. In addition, the total number of parts of the device is large, and the whole device is heavy. Therefore, when carrying around the construction site, when the diameter of the PC steel rod is large, the weight of the tensioning device for the steel rod used is large. It was so inconvenient.
【０００４】[0004]
【課題を解決するための手段】本発明は上記問題点を改
善した中空ＰＣ鋼棒の緊張装置を提供するものである。
前述の課題を有利に解決するために、本発明の中空ＰＣ
鋼棒の緊張装置においては、センターホールジャッキ１
を有する後部フレーム２と、中空ＰＣ鋼棒挿通用透孔３
を有する反力支承用前部フレーム４とが間隔をおいて配
置されると共に連結ロッド５により連結されて、ジャッ
キ付枠形フレーム６が構成され、かつ前記センターホー
ルジャッキ１の中心軸線と中空ＰＣ鋼棒挿通用透孔３の
中心軸線とは、同じ中心軸線７上に配置され、前記セン
ターホールジャッキ１における中空ピストン杆８に、螺
杆９が前後方向に移動自在に螺合され、その螺杆９の後
端部に、回動用レバー１０を有する螺杆回動用駆動軸１
１の前端部が係合され、前記螺杆９の前端部に押込用中
継ロッド１４の後端部が係止され、前記中空ＰＣ鋼棒挿
通用透孔３内に挿通配置された中空ＰＣ鋼棒１５の後端
部外側の雄ねじ１６に、前端部に雌ねじ１７を有する支
承筒１８が螺合され、その支承筒１８の後端部に、環状
係止片１９が固定され、前記中空ＰＣ鋼棒１５内に挿入
されたＰＣ鋼棒２０の後端部に嵌合された押圧係止片２
１が前記支承筒１８の中間内部に配置され、前記押込用
中継ロッド１４の前端部が前記押圧係止片２１に嵌合さ
れ、前記中空ＰＣ鋼棒１５の前端部に、ＰＣ鋼棒２０の
前端部に係合されるストッパ金具２２が着脱自在に固定
され、前記中空ＰＣ鋼棒１５の後端部外側の雄ねじ１６
の中間部に支承用ナット２３が螺合され、前記支承用ナ
ット２３が反力支承用後部フレーム４に係合されてい
る。また前述の課題を有利に解決するために本発明の中
空ＰＣ鋼棒の緊張装置においては、センターホールジャ
ッキ１を有する後部フレーム２と、中空ＰＣ鋼棒挿通用
透孔３を有する反力支承用前部フレーム４とが間隔をお
いて配置されると共に連結ロッド５により連結されて、
ジャッキ付枠形フレーム６が構成され、かつ前記センタ
ーホールジャッキ１の中心軸線と中空ＰＣ鋼棒挿通用透
孔３の中心軸線とは、同じ中心軸線７上に配置され、前
記センターホールジャッキ１における中空ピストン杆８
に、螺杆９が前後方向に移動自在に螺合され、その螺杆
９の後端部に、回動用レバー１０を有する螺杆回動用駆
動軸１１の前端部が係合され、前記螺杆９の前端部に、
前部に押込用中継ロッド係合用凹部１２を有する押込用
押圧係止片１３が係合され、その押込用押圧係止片１３
の前部に押込用中継ロッド１４の後端部が係止され、前
記中空ＰＣ鋼棒挿通用透孔３内に挿通配置された中空Ｐ
Ｃ鋼棒１５の後端部外側の雄ねじ１６に、前端部に雌ね
じ１７を有する支承筒１８が螺合され、その支承筒１８
の後端部に、環状係止片１９が固定され、前記中空ＰＣ
鋼棒１５内に挿入されたＰＣ鋼棒２０の後端部に嵌合さ
れた押圧係止片２１が前記支承筒１８の中間内部に配置
され、前記押込用中継ロッド１４の前端部が前記押圧係
止片２１に嵌合され、前記中空ＰＣ鋼棒１５の前端部
に、ＰＣ鋼棒２０の前端部に係合されるストッパ金具２
２が着脱自在に固定され、前記中空ＰＣ鋼棒１５の後端
部の外側の雄ねじ１６の中間部に支承用ナット２３が螺
合され、前記中空ＰＣ鋼棒挿通用透孔３に嵌合されると
共に反力支承用後部フレーム４の後面に係合される複数
に分割された支圧部材２４が前記支承用ナット２３の前
端面に係合されている。SUMMARY OF THE INVENTION The present invention provides a tensioning device for a hollow PC steel rod that solves the above problems.
In order to advantageously solve the aforementioned problems, the hollow PC of the present invention
In the case of a steel rod tensioning device, the center hole jack 1
Rear frame 2 having a hole and a through hole 3 for inserting a hollow PC steel rod
And a front frame 4 for supporting the reaction force having a space, and are connected by a connecting rod 5 to form a frame frame 6 with a jack, and the central axis of the center hole jack 1 and the hollow PC. The central axis of the through hole 3 for inserting the steel rod is arranged on the same central axis 7, and a screw rod 9 is screwed into the hollow piston rod 8 of the center hole jack 1 so as to be movable in the front-rear direction. A drive shaft for rotating a screw rod 1 having a lever 10 for rotating at a rear end thereof.
1 is engaged with the front end of the screw rod 9, and the rear end of the pushing relay rod 14 is locked to the front end of the screw rod 9. The hollow PC steel rod is inserted through the hollow PC steel rod insertion through hole 3 A support cylinder 18 having a female thread 17 at the front end is screwed into a male screw 16 outside the rear end of 15, and an annular locking piece 19 is fixed to the rear end of the support cylinder 18. The pressure locking piece 2 fitted to the rear end of the PC steel rod 20 inserted into the
1 is arranged inside the middle of the support cylinder 18, the front end portion of the pushing relay rod 14 is fitted to the pressing locking piece 21, and the front end portion of the hollow PC steel rod 15 is connected to the PC steel rod 20. A stopper metal fitting 22 engaged with the front end is detachably fixed, and a male screw 16 outside the rear end of the hollow PC steel rod 15 is provided.
A bearing nut 23 is screwed into an intermediate portion of the bearing, and the bearing nut 23 is engaged with the reaction force bearing rear frame 4. In order to advantageously solve the above-mentioned problems, in the tensioning device for a hollow PC steel rod of the present invention, a rear frame 2 having a center hole jack 1 and a reaction force bearing having a hollow PC steel rod insertion through hole 3 are provided. The front frame 4 and the front frame 4 are spaced apart from each other and are connected by a connecting rod 5,
A frame frame 6 with a jack is configured, and the center axis of the center hole jack 1 and the center axis of the hollow PC steel rod insertion through hole 3 are arranged on the same center axis 7, and the center hole jack 1 has Hollow piston rod 8
A screw rod 9 is screwed to the front end portion of the screw rod 9 so as to be movable in the front-rear direction, and a rear end portion of the screw rod 9 is engaged with a front end portion of a screw rod rotation drive shaft 11 having a rotation lever 10. To
A pushing pressing locking piece 13 having a depression relay rod engaging recess 12 on the front is engaged, and the pressing pushing locking piece 13 is engaged.
The rear end of the push-in relay rod 14 is locked to the front part of the hollow P and is inserted through the hollow PC steel rod insertion through hole 3 to form a hollow P.
A bearing cylinder 18 having a female thread 17 at the front end is screwed into a male screw 16 outside the rear end of the C steel rod 15, and the bearing cylinder 18 is
An annular locking piece 19 is fixed to the rear end of the hollow PC.
A pressure locking piece 21 fitted to the rear end portion of the PC steel rod 20 inserted into the steel rod 15 is arranged inside the middle of the support cylinder 18, and the front end portion of the pushing relay rod 14 is pushed by the pressing portion. A stopper metal fitting 2 fitted to the locking piece 21 and engaged with the front end of the hollow PC steel rod 15 with the front end of the PC steel rod 20.
2 is detachably fixed, and a bearing nut 23 is screwed into an intermediate portion of the male screw 16 on the outer side of the rear end portion of the hollow PC steel rod 15 and fitted into the hollow PC steel rod insertion through hole 3. In addition, a plurality of pressure bearing members 24, which are engaged with the rear surface of the reaction force supporting rear frame 4, are engaged with the front end surface of the bearing nut 23.
【０００５】[0005]
【実施例】図１ないし図１４は本発明の実施例を示すも
のであって、特に図４を参照しながら本発明の装置の構
造を説明する。透孔４０を有するジャッキ取付用の後部
フレーム２と、中空ＰＣ鋼棒挿通用透孔３を有する反力
支承用前部フレーム４とが間隔をおいて配置され、前記
後部フレーム２の左右両側に段付連結ロッド５の後端部
の雄ねじ部が螺合固定され、その各連結ロッド５の前端
部は、前記反力支承用前部フレーム４の左右両側に設け
られた透孔に嵌挿され、前記各連結ロッド５の前端部に
設けられた雄ねじ部にナット３８およびロックナット３
９が螺合され、前記ナット３８により反力支承フレーム
４が支承されている。1 to 14 show an embodiment of the present invention. The structure of the device of the present invention will be described with reference to FIG. 4 in particular. A rear frame 2 for mounting a jack having a through hole 40 and a front frame 4 for supporting a reaction force having a through hole 3 for inserting a hollow PC steel rod are arranged with a space therebetween, and on both left and right sides of the rear frame 2. The male threaded portion of the rear end of the stepped connecting rod 5 is screwed and fixed, and the front end of each connecting rod 5 is fitted and inserted into the through holes provided on the left and right sides of the reaction force supporting front frame 4. The nut 38 and the lock nut 3 are attached to the male screw portion provided on the front end portion of each of the connecting rods 5.
9 are screwed together, and the reaction force support frame 4 is supported by the nut 38.
【０００６】前述の平行に配置された複数の連結ロッド
５（図示の場合は２本）により、各ジャッキ取付用の後
部フレーム２と、反力支承用前部フレームとが連結さ
れ、後述のセンターホールジャッキ１とによりジャッキ
付き枠形フレーム６が構成され、かつ前記透孔４０の中
心軸線と中空ＰＣ鋼棒挿通用透孔３の中心軸線とは、同
じ中心軸線７上に配置され、前記後部フレーム２の透孔
４０の後端部の雌ねじ部２５に、センターホールジャッ
キ１のケーシング２６の前端部外側の雄ねじが螺合固定
されている。なお、前記センターホールジャッキ１の固
定手段として、前記透孔４０の後端部の拡径孔部にセン
ターホールジャッキ１のケーシング２６の前端部を嵌合
すると共に溶接により固定してもよい。The rear frame 2 for mounting each jack and the front frame for supporting the reaction force are connected by the plurality of connecting rods 5 (two in the illustrated case) arranged in parallel to each other, and the center frame to be described later is connected. A frame frame 6 with a jack is configured by the hole jack 1, and the central axis of the through hole 40 and the central axis of the hollow PC steel rod inserting through hole 3 are arranged on the same central axis 7 and the rear portion A male screw outside the front end of the casing 26 of the center hole jack 1 is screwed and fixed to the female screw portion 25 at the rear end of the through hole 40 of the frame 2. As the fixing means of the center hole jack 1, the front end portion of the casing 26 of the center hole jack 1 may be fitted to the enlarged diameter hole portion of the rear end portion of the through hole 40 and fixed by welding.
【０００７】前記センターホールジャッキ１における中
空ピストン杆８内の前端部に、フランジ付筒状雌ねじ部
材２７が嵌合されると共にボルトにより固定され、前記
フランジ付筒状雌ねじ部材２７の雌ねじに螺杆９が位置
調節自在に螺合され、その螺杆９の後端部の非円形孔
に、握手２８を備えた回動用レバー１０の基端部を固定
した螺杆回動用駆動軸１１の前端部の非円形係合部２９
が嵌合係止または嵌合されて溶接により固定されてい
る。A flanged tubular female thread member 27 is fitted to the front end portion of the hollow piston rod 8 of the center hole jack 1 and is fixed by a bolt, and the female thread of the flanged tubular female thread member 27 is screwed 9 Is screwed in such a way that its position can be adjusted, and a non-circular hole at the front end of the screw rod turning drive shaft 11 in which the base end of the turning lever 10 having a handshake 28 is fixed in a non-circular hole at the rear end of the screw rod 9. Engagement part 29
Are fitted and locked or fitted and fixed by welding.
【０００８】前記螺杆９の前端部の係止用凹部３０に、
前部に押込用中継ロッド係合孔１２を有する押込用押圧
係止片１３の後部が嵌合され、その押込用押圧係止片１
３の前記係合孔１２に、押込用中継ロッド１４の後端部
が嵌合係止され、外面に軸長手方向に延長する螺旋状溝
（図示を省略した）を有すると共に前後両端部外側に雄
ねじを有する中空ＰＣ鋼棒１５の後端部の雄ねじ１６側
が、前記中空ＰＣ鋼棒挿通用透孔３内に挿通配置され、
前記雄ねじ１６に、前後両端部に雌ねじを有すると共に
多角形の回動工具係合用外面を有する支承筒１８におけ
る前端部の雌ねじ１７が螺合され、その支承筒１８の後
端部の雌ねじ３１に環状係止片１９が螺合固定され、前
記中空ＰＣ鋼棒１５内に挿入されたＰＣ鋼棒２０の後端
部に押圧係止片２１の凹部が嵌合され、その押圧係止片
２１は、前記支承筒１８の中間内部に配置され、前記押
込用中継ロッド１４の前端部が、前記押圧係止片２１の
後部の凹部に嵌合され、前記ＰＣ鋼棒２０の後端部が前
記押圧係止片２１の前部の凹部に嵌合され、前記中空Ｐ
Ｃ鋼棒１５の前端部外側の雄ねじ３２に、ナット３３が
着脱自在に螺合固定され、かつそのナット３３にストッ
パ３４が螺合されている。In the locking recess 30 at the front end of the screw rod 9,
The rear part of the pressing depressing locking piece 13 having the pressing relay rod engaging hole 12 is fitted in the front part, and the pressing depressing locking piece 1 is fitted.
The rear end portion of the pushing relay rod 14 is fitted and locked in the engaging hole 12 of No. 3 and has a spiral groove (not shown) extending in the axial longitudinal direction on the outer surface, and at the outside of the front and rear end portions. The male screw 16 side of the rear end portion of the hollow PC steel rod 15 having a male screw is inserted and arranged in the hollow PC steel rod insertion through hole 3.
The male screw 16 is screwed to the female screw 17 at the front end of the support cylinder 18 having female threads at both front and rear ends and having a polygonal rotating tool engaging outer surface. The annular locking piece 19 is screwed and fixed, and the recess of the pressing locking piece 21 is fitted to the rear end portion of the PC steel rod 20 inserted into the hollow PC steel bar 15, and the pressing locking piece 21 is Is disposed inside the middle of the support cylinder 18, the front end portion of the pushing relay rod 14 is fitted into the recess of the rear portion of the pressing engagement piece 21, and the rear end portion of the PC steel rod 20 is pressed by the pressing member. The hollow P is fitted in the recess at the front of the locking piece 21.
A nut 33 is detachably screwed to the male screw 32 on the outer side of the front end of the C steel rod 15, and a stopper 34 is screwed to the nut 33.
【０００９】前記ナット３３とストッパ３４とによりス
トッパ金具２２が構成され、そのストッパ３４の後端面
に、前記ＰＣ鋼棒２０の前端部が係合され、前記中空Ｐ
Ｃ鋼棒１５の後端部の外側の雄ねじの中間部に支承用ナ
ット２３が螺合され、前記中空ＰＣ鋼棒挿通用透孔３に
嵌合されると共に反力支承用前部フレーム４の後面に係
合される複数に分割されたフランジを有する支圧部材２
４の半筒状軸部が前記支承用ナット２３の前端面に係合
されている。前記支圧部材２４の円弧状内面３３により
前記中空ＰＣ鋼棒１５が支承され、かつ中空ＰＣ鋼棒挿
通用透孔３と同心状に保持されている。The nut 33 and the stopper 34 constitute a stopper fitting 22, and the rear end surface of the stopper 34 is engaged with the front end portion of the PC steel rod 20 to form the hollow P.
A bearing nut 23 is screwed into the middle portion of the male screw on the outer side of the rear end of the C steel rod 15, and is fitted into the hollow PC steel rod insertion through hole 3 and at the same time as the reaction force bearing front frame 4. Bearing member 2 having a plurality of divided flanges engaged with the rear surface
The semi-cylindrical shaft portion 4 is engaged with the front end surface of the bearing nut 23. The hollow PC steel rod 15 is supported by the arcuate inner surface 33 of the pressure bearing member 24, and is held concentrically with the hollow PC steel rod insertion through hole 3.
【００１０】次に本発明の装置を使用してコンクリート
部材または構造物にプレストレスを導入する場合の手順
について説明する。図１３は、回動用レバー１０を回転
させて、螺杆９が前進（図１３の右方向）移動されて、
押込用中継ロッド１４と押込用押圧係止片１３が嵌合さ
れ、かつ反力支承用前部フレーム４の透孔３に、複数に
分割されたフランジを有する支圧部材２４の半筒状軸部
が嵌合されると共に、その支圧部材２４の後端面に支承
用ナット２３が当接された状態である。この状態では、
中空ピストン杆８を前進移動させていないので、センタ
ーホールジャッキ１の全ストロークを有効に利用するこ
とができる状態である。図１８に示すように、長尺の中
空ＰＣ鋼棒１５を使用する場合（図１８の曲線状に配置
した場合）、支承筒１８および雄ねじ１６の長さを軸方
向に比較的長くする必要があり、その場合には、センタ
ーホールジャッキ１の全ストロークを有効に利用するこ
とになる。Next, the procedure for introducing prestress into a concrete member or structure using the apparatus of the present invention will be described. In FIG. 13, the turning lever 10 is rotated to move the screw rod 9 forward (to the right in FIG. 13),
The semi-cylindrical shaft of the pressure bearing member 24 in which the pushing relay rod 14 and the pushing pushing locking piece 13 are fitted and which has a plurality of divided flanges in the through hole 3 of the reaction force supporting front frame 4. The parts are fitted together, and the bearing nut 23 is in contact with the rear end surface of the bearing member 24. In this state,
Since the hollow piston rod 8 is not moved forward, the entire stroke of the center hole jack 1 can be effectively used. As shown in FIG. 18, when a long hollow PC steel rod 15 is used (arranged in a curved shape in FIG. 18), it is necessary to make the length of the support cylinder 18 and the male screw 16 relatively long in the axial direction. Yes, in that case, the entire stroke of the center hole jack 1 is effectively used.
【００１１】図１３の状態から、油圧等の流体圧により
中空ピストン杆８を前進移動させると、ＰＣ鋼棒（中実
の鋼棒）２０が中空ＰＣ鋼棒１５内に押込まれるように
圧縮力を受け、かつ押圧係止片２１が前進移動（図１３
の右方向）すると共にストッパ金具２２を介して中空Ｐ
Ｃ鋼棒１５に引張力（プレテンション）が作用し、その
中空ＰＣ鋼棒１５に作用している引張力の反力を、支承
用ナット２３および分割型の支圧部材２４を介して反力
支承用前部フレーム４に伝達され、さらに連結ロッド５
およびジャッキ取付用の後部フレーム２を介して押込用
のセンターホールジャッキ１のケーシング２６に伝達さ
れる（図１４の状態）。From the state of FIG. 13, when the hollow piston rod 8 is moved forward by fluid pressure such as hydraulic pressure, the PC steel rod (solid steel rod) 20 is compressed so as to be pushed into the hollow PC steel rod 15. Upon receiving the force, the pressing locking piece 21 moves forward (see FIG. 13).
To the right) and through the stopper fitting 22 through the hollow P
A tensile force (pre-tension) acts on the C steel rod 15, and the reaction force of the tensile force acting on the hollow PC steel rod 15 is reacted via the bearing nut 23 and the split type pressure bearing member 24. It is transmitted to the front frame 4 for support, and further the connecting rod 5
And transmitted to the casing 26 of the center hole jack 1 for pushing through the rear frame 2 for attaching the jack (state of FIG. 14).
【００１２】次に支承筒１８を前進移動（図１４の右方
向）する方向に回転させて、押込係止片２１に環状係止
片１９を当接または圧着させる。この状態においては、
中空ピストン杆８を後退移動（図１４の左方向）させて
も、中空ＰＣ鋼棒に作用している引張力とＰＣ鋼棒２０
に作用している圧縮力との釣り合いが保たれる。したが
って、支承筒１８，環状係止片１９，押圧係止片２１，
支承用２３，中空ＰＣ鋼棒１５，ＰＣ鋼棒２０およびス
トッパ２２以外の部品およびセンターホールジャッキ等
を撤去することができる（図１５の状態）。このように
撤去する場合は、支承用ナット２３を図１４の左方向に
移動する方向に回転させて、支圧部材２４を取外したの
ち、ジャッキ付き枠形フレーム６を図１４の左方向に移
動させて、支承筒１８を中空ＰＣ鋼棒挿通用透孔３を通
過させればよい。すなわち、中空ＰＣ鋼棒挿通用透孔３
の内径は、支承筒１８および支承用ナット２３の外径よ
りも大きく構成されている。なお、押込係止片２１に環
状係止片１９を当接した状態では、押込係止片２１と中
空ＰＣ鋼棒１５の後端面との軸方向の間に間隙があるの
で、ジャッキ１をさらに作動させることができる。Next, the support cylinder 18 is rotated in a direction of moving forward (to the right in FIG. 14) to bring the annular locking piece 19 into contact with or crimp the push-in locking piece 21. In this state,
Even if the hollow piston rod 8 is moved backward (to the left in FIG. 14), the tensile force acting on the hollow PC steel rod and the PC steel rod 20
The balance with the compressive force acting on is maintained. Therefore, the support cylinder 18, the annular locking piece 19, the pressing locking piece 21,
Parts other than the support 23, the hollow PC steel rod 15, the PC steel rod 20 and the stopper 22, the center hole jack and the like can be removed (state of FIG. 15). In the case of removing in this manner, the bearing nut 23 is rotated in the direction of moving to the left in FIG. 14, the pressure bearing member 24 is removed, and then the frame with jack 6 is moved to the left in FIG. Then, the support cylinder 18 may be passed through the hollow PC steel rod insertion through hole 3. That is, the hollow PC steel rod insertion through hole 3
The inner diameter of is larger than the outer diameters of the support cylinder 18 and the support nut 23. In addition, when the annular locking piece 19 is in contact with the push-in locking piece 21, there is a gap between the push-in locking piece 21 and the rear end surface of the hollow PC steel rod 15 in the axial direction. Can be activated.
【００１３】次に図１５の状態の中空ＰＣ鋼棒１５等を
図１６に示すように型枠４１内にセットした後、コンク
リート４２を打設する。コンクリート４２が所定の強度
に達した後、型枠４１を取り外し、油圧または電動式回
動工具（図示を省略した）における回動工具係合孔を支
承筒１８における回動工具係合用外面に係合させて、支
承筒１８を図１６の左方向に移動する方向に回転させ
て、中空ＰＣ鋼棒１５から取り外すと共にＰＣ鋼棒２０
も取り外す。次に、コンクリート４２の端部から突出し
ている部分の中空ＰＣ鋼棒１５を切断除去すると共にコ
ンクリート部材４３の切断除去した中空ＰＣ鋼棒１５端
部付近の凹部にモルタル等の充填材４４を充填してコン
クリート部材４３を完成させる。Next, the hollow PC steel rod 15 and the like in the state of FIG. 15 are set in the form 41 as shown in FIG. 16, and then concrete 42 is poured. After the concrete 42 reaches a predetermined strength, the form 41 is removed, and the turning tool engaging hole in the hydraulic or electric turning tool (not shown) is engaged with the turning tool engaging outer surface of the support cylinder 18. 16 and rotate the support cylinder 18 in the direction of moving to the left in FIG. 16 to remove it from the hollow PC steel rod 15 and to remove it from the PC steel rod 20.
Also remove. Next, the hollow PC steel rod 15 in the portion projecting from the end of the concrete 42 is cut and removed, and the concave portion near the end of the hollow PC steel rod 15 cut and removed of the concrete member 43 is filled with a filler 44 such as mortar. Then, the concrete member 43 is completed.
【００１４】前述の説明は、コンクリート部材４３を製
作する場合について説明したが、本発明の装置は、コン
クリート建造物、例えばコンクリート建築物の床版，
梁，柱あるいは桁等の築造部分の型枠等に配置して現場
施工する場合にも使用することができる。Although the above description has described the case where the concrete member 43 is manufactured, the apparatus of the present invention can be applied to a concrete building, for example, a floor slab of a concrete building,
It can also be used for on-site construction by arranging it on the formwork of the building part such as beams, columns or girders.
【００１５】図１８ないし図２０は、図１５の状態の長
さの異なる複数の中空ＰＣ鋼棒１５等を型枠内に傾斜し
た縦向きおよび曲線状に横向きに配置して使用した場合
であり、中空ＰＣ鋼棒１５を曲線状に弾性変形させて多
数の鉄筋（図示を省略した）に、番線（図示を省略し
た）により固定される。FIGS. 18 to 20 show the case where a plurality of hollow PC steel rods 15 having different lengths in the state of FIG. 15 are used by arranging them in a vertical direction in a slanted shape and in a lateral direction in a curved shape. The hollow PC steel rod 15 is elastically deformed in a curved shape and fixed to a number of reinforcing bars (not shown) by a numbered wire (not shown).
【００１６】図２１は中空箱型構造物４５における開口
壁を補強する場合に適用した例であり、また図２２の場
合は、円筒状構造物４７を補強する場合に適用した例で
ある。なお、高架高速道路等を構成するコンクリート製
ＰＣ箱桁を横締め補強する場合にも当然適用できる。FIG. 21 shows an example applied to reinforce the opening wall of the hollow box structure 45, and FIG. 22 shows an example applied to reinforce the cylindrical structure 47. It should be noted that the present invention can be naturally applied to the case where a concrete PC box girder constituting an elevated expressway is laterally tightened and reinforced.
【００１７】図２３ないし図２５は、ストッパ金具２２
を埋込み固定しない場合に、中空ＰＣ鋼棒１５における
前端部の雄ねじ３２を軸方向に比較的長く設けて、その
雄ねじ３２の中間部にナット４６を設け、そのナット４
６をコンクリート４２中に埋込み固定するように構成し
たものである。この場合の中空ＰＣ鋼棒１５の両端部は
切断除去される。なお、コンクリート４２と中空ＰＣ鋼
棒１５の外面の螺旋状溝との付着がよく、中空ＰＣ鋼棒
１５のプレテンションが消失しなければ、コンクリート
中に埋込まれるナット４６は使用しなくてもよい。23 to 25 show the stopper fitting 22.
When not embedded and fixed, the male screw 32 at the front end portion of the hollow PC steel rod 15 is provided relatively long in the axial direction, and the nut 46 is provided in the middle portion of the male screw 32.
6 is embedded and fixed in concrete 42. In this case, both ends of the hollow PC steel rod 15 are cut and removed. If the concrete 42 and the spiral groove on the outer surface of the hollow PC steel rod 15 adhere well and the pre-tension of the hollow PC steel rod 15 does not disappear, the nut 46 embedded in the concrete is not used. Good.
【００１８】本発明を実施する場合、後部フレーム２に
センターホールジャッキ１を固定しているが、フランジ
付きセンターホールジャッキ１におけるそのフランジに
より、後部フレーム２として代用してもよい。またセン
ターホールジャッキ１における中空ピストン杆８内の前
端部に、フランジ付筒状雌ねじ部材２７を固定している
が、中空ピストン杆８の前端部内側に雌ねじを設け、そ
の雌ねじに螺杆９を螺合するようにしてもよい。When the present invention is carried out, the center hole jack 1 is fixed to the rear frame 2, but the rear frame 2 may be substituted by the flange of the center hole jack 1 with a flange. Further, a cylindrical female screw member 27 with a flange is fixed to the front end portion of the hollow piston rod 8 of the center hole jack 1, but a female screw is provided inside the front end portion of the hollow piston rod 8 and the screw rod 9 is screwed to the female screw. You may make it match.
【００１９】[0019]
【発明の効果】本発明によれば次のような効果が得られ
る。 センターホールジャッキ１を有する後部フレーム２
と反力支承用前部フレーム４とを連結ロッド５により連
結し、これらを一体化したジャッキ付フレーム６とした
ので、部品数を減らすことができかつ軽量化でき、その
ためジャッキ付フレーム６の持ち歩きが容易になり、か
つ鋼材の使用量も少なくすることができるので、緊張装
置の製造コストを低減することができる。 螺杆９をセンターホールジャッキ１における中空ピ
ストン杆８に対し、前後移動自在に螺合したので、セン
ターホールジャッキ１を作動させない状態でも、螺杆９
を押込用中継ロッド１４に対し、回動用レバー１０を回
転させることにより係合させることができる。 センターホールジャッキ１の中心軸線と中空ＰＣ鋼
棒挿通用透孔３の中心軸線とを、同じ中心軸線７上に配
置したので、ＰＣ鋼棒２０の芯（中心軸線）とセンター
ホールジャッキ１の芯（中心軸線）合せを正確に行なう
ことができ、そのため支承筒１８の中空ＰＣ鋼棒１５に
対する螺合連結が容易である。 押込用押圧係止片１３と支圧部材２４の２つの部品
のみを取り替えるだけで、多数の中空ＰＣ鋼棒１５の径
とＰＣ鋼棒２０の径に対応できる。According to the present invention, the following effects can be obtained. Rear frame 2 with center hole jack 1
Since the reaction force supporting front frame 4 is connected by the connecting rod 5 to form the integrated frame 6 with a jack, the number of parts can be reduced and the weight can be reduced, so that the frame 6 with a jack can be carried around. Since it is easy and the amount of steel used can be reduced, the manufacturing cost of the tension device can be reduced. Since the screw rod 9 is screwed into the hollow piston rod 8 of the center hole jack 1 so as to be movable back and forth, the screw rod 9 can be pushed even when the center hole jack 1 is not operated.
Can be engaged with the pushing relay rod 14 by rotating the turning lever 10. Since the center axis of the center hole jack 1 and the center axis of the hollow PC steel rod insertion through hole 3 are arranged on the same center axis 7, the core (center axis) of the PC steel rod 20 and the center hole of the center hole jack 1 are arranged. The (center axis) alignment can be performed accurately, and therefore the support cylinder 18 can be easily screwed and connected to the hollow PC steel rod 15. The diameters of a large number of hollow PC steel rods 15 and PC steel rods 20 can be dealt with by simply replacing only the two parts, the pushing pressure locking piece 13 and the bearing member 24.
【図１】本発明の実施例に係る中空ＰＣ鋼棒の緊張装置
の一部を省略して示す斜視図である。1 is a perspective view showing a hollow PC steel rod tensioning device according to an embodiment of the present invention with a part thereof omitted.
【図２】図１における左側部分を拡大して示す斜視図で
ある。FIG. 2 is an enlarged perspective view showing a left side portion in FIG.
【図３】図１における右側部分を拡大して示す斜視図で
ある。3 is an enlarged perspective view showing a right side portion in FIG. 1. FIG.
【図４】本発明の実施例に係る中空ＰＣ鋼棒の緊張装置
を示す一部横断平面図である。FIG. 4 is a partial cross-sectional plan view showing a tensioning device for a hollow PC steel rod according to an embodiment of the present invention.
【図５】本発明の実施例に係る中空ＰＣ鋼棒の緊張装置
を示す一部切欠縦断側面図である。FIG. 5 is a partially cutaway vertical side view showing a tensioning device for a hollow PC steel rod according to an embodiment of the present invention.
【図６】本発明の実施例に係る中空ＰＣ鋼棒の緊張装置
の一部を拡大して示す横断平面図である。FIG. 6 is a cross-sectional plan view showing an enlarged part of the tensioning device for the hollow PC steel rod according to the embodiment of the present invention.
【図７】本発明の実施例における一対支圧部材を反力支
承用後部フレームにより支承した状態を示す正面図であ
る。FIG. 7 is a front view showing a state in which the pair of bearing members according to the embodiment of the present invention are supported by the reaction force supporting rear frame.
【図８】本発明の実施例に係る中空ＰＣ鋼棒の緊張装置
の一部を示す正面図である。FIG. 8 is a front view showing a part of the tensioning device for the hollow PC steel rod according to the embodiment of the present invention.
【図９】図４のＡ−Ａ線断面図である。9 is a cross-sectional view taken along the line AA of FIG.
【図１０】図４のＢ−Ｂ線断面図である。10 is a cross-sectional view taken along line BB of FIG.
【図１１】本発明の実施例に係る中空ＰＣ鋼棒の緊張装
置の一部を拡大して示す縦断側面図である。FIG. 11 is a vertical cross-sectional side view showing an enlarged part of the tensioning device for the hollow PC steel rod according to the embodiment of the present invention.
【図１２】本発明の実施例に係るセンターホールジャッ
キ付近を拡大して示す縦断側面図である。FIG. 12 is an enlarged vertical sectional side view showing the vicinity of the center hole jack according to the embodiment of the present invention.
【図１３】回動用レバーを回転させて、螺杆の前端凹部
内に中継ロッドを嵌合係止した状態を示す横断平面図で
ある。FIG. 13 is a cross-sectional plan view showing a state in which the relay lever is rotated to fit and lock the relay rod in the front end recess of the screw rod.
【図１４】図１３の状態からセンターホールジャッキに
おける中空ピストン杆を前進移動させた状態を示す横断
平面図である。14 is a cross-sectional plan view showing a state in which the hollow piston rod of the center hole jack has been moved forward from the state of FIG.
【図１５】中空ＰＣ鋼棒内にＰＣ鋼棒を押込むと共に支
承筒を前進移動するように回転させて、支承筒における
環状係止片を押圧係止片に当接させた状態でセンターホ
ールジャッキ等を撤去した状態を示す横断平面図であ
る。FIG. 15 is a center hole in a state where the PC steel rod is pushed into the hollow PC steel rod and the supporting cylinder is rotated so as to move forward, and the annular locking piece of the supporting cylinder is brought into contact with the pressing locking piece. It is a cross-sectional top view which shows the state which removed the jack etc.
【図１６】図１５の状態の中空ＰＣ鋼棒を型枠内に配置
してコンクリートを打設した状態を示す縦断側面図であ
る。FIG. 16 is a vertical cross-sectional side view showing a state where the hollow PC steel rod in the state of FIG. 15 is placed in a formwork and concrete is placed.
【図１７】図１６の状態からコンクリートが所定の強度
に達した後、支承筒を回動工具により、取外して、中空
ＰＣ鋼棒およびコンクリート部材に圧縮力を導入した状
態を示す縦断側面図である。FIG. 17 is a vertical cross-sectional side view showing a state in which after the concrete reaches a predetermined strength from the state of FIG. 16, the supporting cylinder is removed by a rotating tool and a compressive force is introduced into the hollow PC steel rod and the concrete member. is there.
【図１８】図１５の状態の中空ＰＣ鋼棒を型枠内に縦向
きおよび横向きに配置して使用した状態を示す縦断側面
図である。FIG. 18 is a vertical cross-sectional side view showing a state where the hollow PC steel rods in the state of FIG. 15 are used by arranging them vertically and horizontally in the mold.
【図１９】図１８の一部を拡大して示す縦断側面図であ
る。FIG. 19 is a vertical sectional side view showing a part of FIG. 18 in an enlarged manner.
【図２０】図１８の状態からコンクリート硬化後の完成
したコンクリート部材を示す縦断側面図である。FIG. 20 is a vertical cross-sectional side view showing the completed concrete member after the concrete is hardened from the state of FIG.
【図２１】図１５の状態のＰＣ鋼棒を箱型構造物に使用
して、補強された箱型構造を示す縦断正面図である。FIG. 21 is a vertical cross-sectional front view showing a reinforced box type structure using the PC steel rod in the state of FIG. 15 in the box type structure.
【図２２】図１５の状態のＰＣ鋼棒を円筒状構造物内に
曲線配置して、補強された円筒状構造物が完成した状態
を示す横断平面図である。22 is a cross-sectional plan view showing a state in which the reinforced cylindrical structure is completed by arranging the PC steel rods in the state of FIG. 15 in a curved structure in the cylindrical structure.
【図２３】ストッパー金具の後部において中空ＰＣ鋼棒
にナットを取付けた場合の使用状態を示す縦断側面図で
ある。FIG. 23 is a vertical cross-sectional side view showing a usage state when a nut is attached to a hollow PC steel rod in the rear portion of the stopper metal fitting.
【図２４】図２３の状態を詳細に示した一部切欠縦断側
面図である。FIG. 24 is a partially cutaway vertical side view showing the state of FIG. 23 in detail.
【図２５】図２４の状態からコンクリートが所定の強度
に達した後、支承筒を回動工具により取外して、中空Ｐ
Ｃ鋼棒に圧縮力を導入すると共にコンクリート部材に圧
縮力を導入した状態を示す縦断側面図である。[Fig. 25] After the concrete reaches a predetermined strength from the state of Fig. 24, the support cylinder is removed by a rotating tool to form a hollow P
It is a longitudinal side view showing the state where the compressive force was introduced into the C steel rod and the compressive force was introduced into the concrete member.
１ センターホールジャッキ ２ ジャッキ取付用後部フレーム ３ 中空ＰＣ鋼棒挿通用透孔 ４ 反力支承用前部フレーム ５ 連結ロッド ６ ジャッキ付枠形フレーム ７ 中心軸線ホールジャッキ ８ 中空ピストン杆 ９ 螺杆 １０ 回動用レバー １１ 螺杆回動用駆動軸 １２ 押込用中継ロッド係合孔 １３ 押込用押圧係止片（アダプター） １４ 押込用中継ロッド １５ 中空ＰＣ鋼棒 １６ 雄ねじ １７ 雌ねじ １８ 支承筒 １９ 環状係止片 ２０ ＰＣ鋼棒 ２１ 押圧係止片 ２２ ストッパ金具 ２３ 支承用ナット ２４ 支圧部材（アダプター） ２５ 雌ねじ部 ２６ ケーシング ２７ フランジ付筒状雌ねじ部材 ２８ 握手 ２９ 非円形係合部 ３０ 係止用凹部 ３１ 雌ねじ ３２ 雄ねじ ３３ 円弧状内面 ３４ 分割支圧部材 ３５ 分割支圧部材 ３６ 半円筒状軸部 ３７ 後部外側フランジ ３８ ナット ３９ ロックナット ４０ 透孔 ４１ 型枠 ４２ コンクリート ４３ コンクリート部材 ４４ 充填物 ４５ 中空箱型構造物 ４６ ナット ４７ 円筒状構造物 1 Center hole jack 2 Rear frame for jack installation 3 Hollow PC steel rod insertion through hole 4 Front frame for reaction force support 5 Connecting rod 6 Frame frame with jack 7 Center axis hole jack 8 Hollow piston rod 9 Screw rod 10 Rotating Lever 11 Screw rod rotation drive shaft 12 Pushing relay rod engaging hole 13 Pushing pressing locking piece (adapter) 14 Pushing relay rod 15 Hollow PC steel rod 16 Male screw 17 Female screw 18 Bearing cylinder 19 Annular locking piece 20 PC steel Rod 21 Pressing locking piece 22 Stopper fitting 23 Bearing nut 24 Bearing member (adapter) 25 Female screw part 26 Casing 27 Flange tubular female screw member 28 Handshake 29 Non-circular engaging part 30 Locking recess 31 Female screw 32 Male screw 33 Arc-shaped inner surface 34 Split bearing member 35 Split bearing member 36 Semi-cylindrical shaft portion 3 Rear outer flange 38 a nut 39 Lock nut 40 through hole 41 Formwork 42 Concrete 43 concrete member 44 filling 45 hollow box-shaped structure 46 nut 47 cylindrical structure
───────────────────────────────────────────────────── フロントページの続き (72)発明者 今井 昌文 栃木県宇都宮市石井町3010−58 (72)発明者 山本 仁 東京都中央区新富一丁目６番３号 山本 扛重機株式会社内 (72)発明者 溝口 茂 神奈川県平塚市田村5893 高周波熱錬株 式会社湘南事業所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masafumi Imai 3010-58 Ishii-cho, Utsunomiya City, Tochigi Prefecture (72) Inventor Hitoshi Yamamoto 1-6-3 Shintomi 1-chome, Chuo-ku, Tokyo Yamamoto Rakijuki Co., Ltd. (72) Inventor Shigeru Mizoguchi 5893 Tamura, Hiratsuka-shi, Kanagawa High-frequency smelting company Shonan Works
Claims (2)
フレーム２と、中空ＰＣ鋼棒挿通用透孔３を有する反力
支承用前部フレーム４とが間隔をおいて配置されると共
に連結ロッド５により連結されて、ジャッキ付枠形フレ
ーム６が構成され、かつ前記センターホールジャッキ１
の中心軸線と中空ＰＣ鋼棒挿通用透孔３の中心軸線と
は、同じ中心軸線７上に配置され、前記センターホール
ジャッキ１における中空ピストン杆８に、螺杆９が前後
方向に移動自在に螺合され、その螺杆９の後端部に、回
動用レバー１０を有する螺杆回動用駆動軸１１の前端部
が係合され、前記螺杆９の前端部に押込用中継ロッド１
４の後端部が係止され、前記中空ＰＣ鋼棒挿通用透孔３
内に挿通配置された中空ＰＣ鋼棒１５の後端部外側の雄
ねじ１６に、前端部に雌ねじ１７を有する支承筒１８が
螺合され、その支承筒１８の後端部に、環状係止片１９
が固定され、前記中空ＰＣ鋼棒１５内に挿入されたＰＣ
鋼棒２０の後端部に嵌合された押圧係止片２１が前記支
承筒１８の中間内部に配置され、前記押込用中継ロッド
１４の前端部が前記押圧係止片２１に嵌合され、前記中
空ＰＣ鋼棒１５の前端部に、ＰＣ鋼棒２０の前端部に係
合されるストッパ金具２２が着脱自在に固定され、前記
中空ＰＣ鋼棒１５の後端部外側の雄ねじ１６の中間部に
支承用ナット２３が螺合され、前記支承用ナット２３が
反力支承用後部フレーム４に係合されている中空ＰＣ鋼
棒の緊張装置。1. A rear frame 2 having a center hole jack 1 and a reaction force supporting front frame 4 having a hollow PC steel rod insertion through hole 3 are arranged at a distance and are connected by a connecting rod 5. To form a frame frame 6 with a jack, and the center hole jack 1
The center axis of the hollow hole and the center axis of the hollow PC steel rod insertion through hole 3 are arranged on the same center axis 7, and the screw rod 9 is screwed to the hollow piston rod 8 of the center hole jack 1 so as to be movable in the front-rear direction. The rear end of the screw rod 9 is engaged with the front end of the screw rod rotation drive shaft 11 having the rotation lever 10, and the front end of the screw rod 9 is pushed into the pushing relay rod 1.
4, the rear end portion of which is locked, and the hollow PC steel rod insertion through hole 3
A supporting cylinder 18 having a female thread 17 at the front end is screwed into a male screw 16 on the outer side of the rear end of the hollow PC steel rod 15 which is inserted through the inside, and an annular locking piece is provided at the rear end of the supporting cylinder 18. 19
PC fixed in place and inserted into the hollow PC steel rod 15
A pressure locking piece 21 fitted to the rear end of the steel rod 20 is arranged inside the middle of the support cylinder 18, and a front end of the pushing relay rod 14 is fitted to the pressure locking piece 21. A stopper metal fitting 22 that is engaged with the front end of the PC steel rod 20 is detachably fixed to the front end of the hollow PC steel rod 15, and an intermediate portion of the male screw 16 outside the rear end of the hollow PC steel rod 15. A tensioning device for a hollow PC steel rod, in which a bearing nut 23 is screwed onto the support nut 23 and the bearing nut 23 is engaged with the reaction force bearing rear frame 4.
フレーム２と、中空ＰＣ鋼棒挿通用透孔３を有する反力
支承用前部フレーム４とが間隔をおいて配置されると共
に連結ロッド５により連結されて、ジャッキ付枠形フレ
ーム６が構成され、かつ前記センターホールジャッキ１
の中心軸線と中空ＰＣ鋼棒挿通用透孔３の中心軸線と
は、同じ中心軸線７上に配置され、前記センターホール
ジャッキ１における中空ピストン杆８に、螺杆９が前後
方向に移動自在に螺合され、その螺杆９の後端部に、回
動用レバー１０を有する螺杆回動用駆動軸１１の前端部
が係合され、前記螺杆９の前端部に、前部に押込用中継
ロッド係合用凹部１２を有する押込用押圧係止片１３が
係合され、その押込用押圧係止片１３の前部に押込用中
継ロッド１４の後端部が係止され、前記中空ＰＣ鋼棒挿
通用透孔３内に挿通配置された中空ＰＣ鋼棒１５の後端
部外側の雄ねじ１６に、前端部に雌ねじ１７を有する支
承筒１８が螺合され、その支承筒１８の後端部に、環状
係止片１９が固定され、前記中空ＰＣ鋼棒１５内に挿入
されたＰＣ鋼棒２０の後端部に嵌合された押圧係止片２
１が前記支承筒１８の中間内部に配置され、前記押込用
中継ロッド１４の前端部が前記押圧係止片２１に嵌合さ
れ、前記中空ＰＣ鋼棒１５の前端部に、ＰＣ鋼棒２０の
前端部に係合されるストッパ金具２２が着脱自在に固定
され、前記中空ＰＣ鋼棒１５の後端部の外側の雄ねじ１
６の中間部に支承用ナット２３が螺合され、前記中空Ｐ
Ｃ鋼棒挿通用透孔３に嵌合されると共に反力支承用後部
フレーム４の後面に係合される複数に分割された支圧部
材２４が前記支承用ナット２３の前端面に係合されてい
る中空ＰＣ鋼棒の緊張装置。2. A rear frame 2 having a center hole jack 1 and a reaction force supporting front frame 4 having a hollow PC steel rod insertion through hole 3 are arranged at a distance and are connected by a connecting rod 5. To form a frame frame 6 with a jack, and the center hole jack 1
The center axis of the hollow hole and the center axis of the hollow PC steel rod insertion through hole 3 are arranged on the same center axis 7, and the screw rod 9 is screwed to the hollow piston rod 8 of the center hole jack 1 so as to be movable in the front-rear direction. The front end of the screw rod rotation drive shaft 11 having the rotation lever 10 is engaged with the rear end portion of the screw rod 9, and the front end portion of the screw rod 9 is pushed forward by the recessed portion for engaging the relay rod. The pushing press locking piece 13 having 12 is engaged, and the rear end of the pushing relay rod 14 is locked to the front part of the pressing pushing locking piece 13, and the hollow PC steel rod insertion through hole is provided. 3, a supporting cylinder 18 having a female thread 17 at the front end is screwed into a male screw 16 on the outer side of the rear end of the hollow PC steel rod 15 which is inserted and arranged, and an annular locking is made at the rear end of the supporting cylinder 18. PC steel rod 20 in which the piece 19 is fixed and is inserted into the hollow PC steel rod 15. Pressing locking pieces 2 that is fitted to the rear end portion
1 is arranged inside the middle of the support cylinder 18, the front end portion of the pushing relay rod 14 is fitted to the pressing locking piece 21, and the front end portion of the hollow PC steel rod 15 is connected to the PC steel rod 20. A stopper metal fitting 22 engaged with the front end is detachably fixed, and the male screw 1 on the outer side of the rear end of the hollow PC steel rod 15 is attached.
6, a bearing nut 23 is screwed into the middle portion of
A plurality of pressure bearing members 24, which are fitted into the C steel rod insertion through holes 3 and are engaged with the rear surface of the reaction force supporting rear frame 4, are engaged with the front end surface of the supporting nut 23. Tensioning device for hollow PC steel rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29370494A JP2678158B2 (en) | 1994-11-04 | 1994-11-04 | Hollow PC steel rod tension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29370494A JP2678158B2 (en) | 1994-11-04 | 1994-11-04 | Hollow PC steel rod tension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08135194A JPH08135194A (en) | 1996-05-28 |
| JP2678158B2 true JP2678158B2 (en) | 1997-11-17 |
Family
ID=17798161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29370494A Expired - Lifetime JP2678158B2 (en) | 1994-11-04 | 1994-11-04 | Hollow PC steel rod tension device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2678158B2 (en) |
Cited By (1)
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|---|---|---|---|---|
| JP2018178360A (en) * | 2017-04-03 | 2018-11-15 | 濱中ナット株式会社 | Contracting force introduction device for pc steel rod unit |
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|---|---|---|---|---|
| JP2009121208A (en) * | 2007-11-19 | 2009-06-04 | Oriental Shiraishi Corp | Prestress force introducing device for introducing prestress to optional position |
| CN101845894B (en) * | 2010-06-23 | 2011-10-19 | 北京市建筑工程研究院 | U-shaped tool device for prestressed steel structure tensioning construction and construction method |
| CN102587582B (en) * | 2012-03-09 | 2014-12-17 | 杭州图强工程材料有限公司 | Pre-stress tensioning clamp of hollow self-balance pre-stress steel bar |
| CN102888997A (en) * | 2012-10-31 | 2013-01-23 | 北京银泰建预应力工程有限公司 | Device for inhaul cable tensioning construction in prestressed steel structure |
| JP6571345B2 (en) * | 2015-02-20 | 2019-09-04 | 株式会社近畿開発 | Prestressing method for concrete structures |
| JP6408397B2 (en) * | 2015-02-20 | 2018-10-17 | 株式会社近畿開発 | PC steel bar unit tightening force measuring device |
| CN104775624B (en) * | 2015-04-20 | 2016-11-23 | 中国葛洲坝集团第五工程有限公司 | A kind of large-tonnage tensioning construction adjusting means |
| CN108620516B (en) * | 2018-05-03 | 2020-07-14 | 广西万德建工集团有限公司 | Reinforcing bar junctor for building |
-
1994
- 1994-11-04 JP JP29370494A patent/JP2678158B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018178360A (en) * | 2017-04-03 | 2018-11-15 | 濱中ナット株式会社 | Contracting force introduction device for pc steel rod unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08135194A (en) | 1996-05-28 |
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