JPS59165770A - Tension force adjustment of steel bar for prestressed concrete - Google Patents
Tension force adjustment of steel bar for prestressed concreteInfo
- Publication number
- JPS59165770A JPS59165770A JP3963483A JP3963483A JPS59165770A JP S59165770 A JPS59165770 A JP S59165770A JP 3963483 A JP3963483 A JP 3963483A JP 3963483 A JP3963483 A JP 3963483A JP S59165770 A JPS59165770 A JP S59165770A
- Authority
- JP
- Japan
- Prior art keywords
- tension
- plate
- steel rod
- prestressed concrete
- steel bar
- 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.)
- Pending
Links
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は、プレストレストコンクリート用鋼棒に尋人
すべき張力を微調整することを目的としたプレストレス
トコンクリート用鋼棒の張力調整方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting the tension of a steel rod for prestressed concrete, the purpose of which is finely adjusting the tension applied to the steel rod for prestressed concrete.
プレストレストコンクリート用の鋼棒を緊張させる方法
としては、油圧等のジャツギによって鋼棒を引張する方
法が一般に行なわれている。係る方法においては、鋼棒
の張力はジヤツキによる引張量によって決定されること
となるが、ジャツギによる引張量を微調整することかむ
つかしく、鋼棒に導入する張力の精度を向上することが
困難であった。一方、鋼棒の品質によっては導入張力に
ついて高精度を要求されるが、これに対応し得ないとい
う問題点があり、製品に設計値通りの張力が要求される
場合に大きなネックとなっていた。A commonly used method for tensioning steel rods for prestressed concrete is to tension the steel rods using hydraulic pressure or the like. In such a method, the tension of the steel bar is determined by the amount of tension applied by the jacks, but it is difficult to finely adjust the amount of tension caused by the jacks, and it is difficult to improve the accuracy of the tension introduced into the steel bar. there were. On the other hand, depending on the quality of the steel rod, high precision is required for the introduced tension, but there is a problem in that it is not possible to meet this requirement, which becomes a major bottleneck when a product is required to have a tension as designed. .
しかるにこの発明は、グレストレストコンクリート用の
鋼棒を固定した緊張盤をジヤツキで移動させてはg設計
値付近の張力を導入した後、更に緊張盤の内外環の螺合
位置関係を変化させて前記鋼棒の張力を微調整したので
、設計値通りの張力を高精度で確実に導入することが可
能となり、前記従来の間趙点ヲノテー決したものである
。However, in this invention, the tension plate to which the steel rods for grestressed concrete are fixed is moved with a jack to introduce a tension near the g design value, and then the screw position relationship between the inner and outer rings of the tension plate is changed. Since the tension of the steel rod is finely adjusted, it is possible to reliably introduce the designed tension with high precision, which is an improvement over the conventional method.
以下この発明を図面に示す実施例に基づいて説明する。The present invention will be described below based on embodiments shown in the drawings.
枠状のジャッキチェアー/内へ挿通されたテンションバ
ースの先端に掛止段部3を有する掛止盤グが固定してあ
り、前記掛止段部3には内環5と外環乙とを螺合してな
る緊張盤7が掛止している。Frame-shaped jack chair/A latching plate having a latching step 3 is fixed to the tip of the tension berth inserted into the inside, and the latching step 3 has an inner ring 5 and an outer ring B. A tension plate 7 formed by screwing together is latched.
前記内環Sには鋼棒挿通孔gが設けである。図中9は型
枠/gの端板であって、前記型枠/gに支持されている
。The inner ring S is provided with a steel rod insertion hole g. 9 in the figure is an end plate of the formwork/g, which is supported by the formwork/g.
上記のように構成された装置に、プレストレストコンク
リ)用の鋼棒10の自由端を、前記端板9及び内環Sの
挿通孔g、/′/を挿通させると共にナンド//を螺合
させて固定する。次いでテンションバースを矢示/2方
向へ移動させ(テンションバー2は流体圧シリンダーに
連結しである)、掛止盤qを介して緊張盤7を同方向へ
引張して前記鋼棒10を緊張させ、緊張盤7の移動によ
って生じた緊張盤7と端板9との間隙にスペーサーリン
グ/3を介装する。該スペーサーリング/3は第3図に
示すように、半円形の弧状片//lをコ個、連結片15
で回転自在に連結してなり、開いた状態(第3図鎖線図
示)で前記間隙に当てがって嵌め込むようにして装着す
る。前記スペーサーリング/3は、前記緊張盤7の内環
と端板りとの距離にほぼ等しい厚さと、前゛記外環乙と
ほぼ等しい幅とを有しており、鋼棒10の張力に十分耐
え得る強度の材質としである。尚、スペーサーリング/
3に代えて適宜のブロックを複数個用いてもよい。前記
によりスペーサーリング/3を介装した後、鋼棒10に
導入された張力を測定し、張力が不足している場合には
外環6を回転させてこれと螺合した内環Sを矢示/乙方
向へ移動させる。前記と反対に張力が過大な場合には外
環乙を前記と逆に回転させて内環左を矢示/7方向へ移
動させる。上記いずれの場合も、張力を測定しつつ操作
することにより、所望の張力を確実かつ容易に導入する
ことができる。The free end of the steel rod 10 for prestressed concrete is inserted through the insertion holes g, /'/ of the end plate 9 and the inner ring S, and the NAND // is screwed into the device configured as described above. and fix it. Next, the tension bar is moved in the two directions indicated by the arrow (the tension bar 2 is connected to the fluid pressure cylinder), and the tension plate 7 is pulled in the same direction via the latching plate q to tension the steel rod 10. Then, a spacer ring/3 is interposed in the gap between the tension plate 7 and the end plate 9 created by the movement of the tension plate 7. As shown in FIG.
They are rotatably connected to each other, and are installed by fitting them into the gap in the open state (shown by chain lines in FIG. 3). The spacer ring /3 has a thickness approximately equal to the distance between the inner ring and the end plate of the tension plate 7, and a width approximately equal to the outer ring B, and is capable of supporting the tension of the steel rod 10. The material is strong enough to endure. In addition, spacer ring/
In place of 3, a plurality of appropriate blocks may be used. After inserting the spacer ring/3 as described above, the tension introduced into the steel rod 10 is measured, and if the tension is insufficient, the outer ring 6 is rotated and the inner ring S screwed therewith is rotated. Move in the direction shown/B. In contrast to the above, if the tension is excessive, the outer ring B is rotated in the opposite direction to the above, and the left inner ring is moved in the direction of arrow /7. In any of the above cases, the desired tension can be reliably and easily introduced by operating while measuring the tension.
すなわちこの発明によれば、内環に外環を螺合させてな
る緊張盤の内環ヘプレスbルストコンクリート用鋼棒の
自由端を固定した後、前記緊張盤をジヤツキで移動させ
て鋼棒を緊張させ、次いで前記緊張盤の外環とジヤツキ
の端板との間にスペーサーを介装した後、前記外環を適
宜回転させて端板と内環との距離を調節させることによ
つ鋼棒の張力を微調整したので、容易に張力を微調整す
ることができる。また微調整によつ設計値通りの張力を
確実に導入することができるので、鋼棒に高精度で張力
を導入したブレストレストコンクリート製品を得ること
ができる。That is, according to the present invention, after fixing the free end of the steel rod for rust concrete to the inner ring of the tension plate formed by screwing the outer ring onto the inner ring, the tension plate is moved with a jack to tighten the steel rod. After tensioning the tension plate and inserting a spacer between the outer ring of the tension plate and the end plate of the jack, the outer ring is appropriately rotated to adjust the distance between the end plate and the inner ring. Since the tension of the rod has been fine-tuned, the tension can be easily fine-tuned. Moreover, since the tension according to the design value can be reliably introduced through fine adjustment, it is possible to obtain a breast-stressed concrete product in which tension is introduced into the steel rod with high precision.
更にこの発明は、緊張盤を交換するのみで、従来のジヤ
ツキ装置を用いてそのまま実施することが可能である。Furthermore, the present invention can be implemented as is using a conventional jacking device by simply replacing the tensioning plate.
第1図はこの発明の実施に用いる装置の〜平面図、第2
図は同じく緊張状態を示す断面図、第3図は同じくスペ
ーサーリングの平面図で゛ある。Fig. 1 is a plan view of the apparatus used for carrying out this invention;
The figure is a sectional view showing the tensioned state, and FIG. 3 is a plan view of the spacer ring.
Claims (1)
トレストコンクリート用鋼棒の自由端を固定した後、前
記緊張盤をジヤツキで軸方向へ移動させて前記鋼棒を緊
張させ、次いで前記緊張盤と゛型枠の端板との間にスペ
ーサーを介装した後、前記外環を所望の方向へ適宜回転
させて端板と内環との距離を調節することにより前記鋼
棒に導入する張力を微調整することを特徴としたプレス
トレス]・コンクリート用鋼棒の張力調整方法λ 距離
の調節は、張力な計測しつつ行なうことを特徴とする特
許請求の範囲第1項記載のプレストレストコンクリート
用鋼棒の張力調整方法/ After fixing the free end of a steel rod for prestressed concrete to the inner ring of a tension plate formed by screwing an outer ring into a circular ring, the tension plate is moved in the axial direction with a jack to tension the steel rod, Next, after interposing a spacer between the tension plate and the end plate of the formwork, the outer ring is appropriately rotated in a desired direction to adjust the distance between the end plate and the inner ring, so that the steel rod is [Prestress characterized by finely adjusting the tension to be introduced]-Method for adjusting the tension of a steel rod for concrete λ The distance adjustment is performed while measuring the tension. How to adjust the tension of steel rods for prestressed concrete
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3963483A JPS59165770A (en) | 1983-03-10 | 1983-03-10 | Tension force adjustment of steel bar for prestressed concrete |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3963483A JPS59165770A (en) | 1983-03-10 | 1983-03-10 | Tension force adjustment of steel bar for prestressed concrete |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59165770A true JPS59165770A (en) | 1984-09-19 |
Family
ID=12558519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3963483A Pending JPS59165770A (en) | 1983-03-10 | 1983-03-10 | Tension force adjustment of steel bar for prestressed concrete |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59165770A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4814903U (en) * | 1971-07-02 | 1973-02-20 | ||
JPS56139361A (en) * | 1980-03-29 | 1981-10-30 | Kurosawa Kensetsu Kk | Pc steel wire tension retention |
JPS57143616A (en) * | 1981-03-03 | 1982-09-04 | Nippon Koki:Kk | Condition controller for pc steel wire |
-
1983
- 1983-03-10 JP JP3963483A patent/JPS59165770A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4814903U (en) * | 1971-07-02 | 1973-02-20 | ||
JPS56139361A (en) * | 1980-03-29 | 1981-10-30 | Kurosawa Kensetsu Kk | Pc steel wire tension retention |
JPS57143616A (en) * | 1981-03-03 | 1982-09-04 | Nippon Koki:Kk | Condition controller for pc steel wire |
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