JPH0769129B2 - Elongation measuring device for tension steel in prestressed concrete work - Google Patents
Elongation measuring device for tension steel in prestressed concrete workInfo
- Publication number
- JPH0769129B2 JPH0769129B2 JP62304564A JP30456487A JPH0769129B2 JP H0769129 B2 JPH0769129 B2 JP H0769129B2 JP 62304564 A JP62304564 A JP 62304564A JP 30456487 A JP30456487 A JP 30456487A JP H0769129 B2 JPH0769129 B2 JP H0769129B2
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- fixed
- tension steel
- elongation
- prestressed concrete
- 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
- A Measuring Device Byusing Mechanical Method (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はプレストレストコンクリート工事におけるプレ
スト導入用のストランド等の緊張鋼材の伸び測定装置に
係るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an elongation measuring device for a tensile steel material such as a strand for introducing a prestress in prestressed concrete construction.
（従来の技術） 従来プレストレストコンクリート工事における緊張鋼材
の緊張管理は、同鋼材の伸びと引張荷重とを測定して行
なわれている。(Prior Art) Conventionally, tension management of a tensile steel material in prestressed concrete construction is performed by measuring elongation and tensile load of the steel material.
而して緊張鋼材の伸びは、同鋼材緊張用ジヤツキラムや
緊張鋼材自体が緊張時において軸方向まわりの回転運動
が生起するために測定が難しく、緊張鋼材の緊張用ジヤ
ツキシリンダーのストロークの伸びの測定によって代替
されていた。Therefore, it is difficult to measure the elongation of the tension steel material because the jack ram for tensioning the steel material or the tension steel material itself causes a rotational movement around the axial direction when tension occurs, and the elongation of the stroke of the jack cylinder for tensioning the tension steel material is It was replaced by measurement.
（発明が解決しようとする問題点） しかしながらこの方法は直接緊張鋼材の伸びを測定する
のではなく、ジヤツキシリンダーのストロークによって
間接的に測定するので測定誤差を生じ、測定結果に十分
な信頼性をおくことができなかった。(Problems to be solved by the invention) However, since this method does not directly measure the elongation of the tensile steel material but indirectly by the stroke of the jack cylinder, a measurement error occurs and the measurement result has sufficient reliability. I couldn't put it.
（問題点を解決するための手段） 本発明はこのような問題点を解決するために提案された
ものであって、プレストレス導入用緊張鋼材に、同緊張
鋼材の材軸方向に固定され、且つ材軸まわりに回転可能
に装着された連結材の先端を、前記緊張鋼材の軸方向に
のみ運動が許容されるように構成された伸び検出計の検
出軸に、同検出軸の軸方向には固定するとともに、同検
出軸の軸まわりに回転自在に、且つ同軸の直交方向に可
摺動的に連結してなることを特徴とするプレストレスト
コンクリート工事における緊張鋼材の伸び測定装置に係
るものである。(Means for Solving Problems) The present invention has been proposed in order to solve such problems, and is fixed to a prestressing tension steel material in the axial direction of the tension steel material, And, the tip of the connecting member rotatably mounted around the material axis is attached to the detection axis of the elongation detector configured to be allowed to move only in the axial direction of the tensile steel material, in the axial direction of the detection axis. Is a device for measuring the elongation of tension steel materials in prestressed concrete construction, characterized in that it is fixed, and is rotatable about the axis of the detection shaft and slidably connected in the coaxial orthogonal direction. is there.
（作用） 本発明は前記したように構成されているので、プレスト
レス導入用緊張鋼材が緊張されて伸長するのに伴って、
同鋼材に材軸方向には固定され、材軸まわりに回転自在
に装着された連結材は、緊張鋼材自体の回転、及び同緊
張鋼材の緊張用ジヤツキラムの回転によって影響を受け
ることなく、緊張鋼材の伸び方向に正確に対応して移動
する。(Action) Since the present invention is configured as described above, as the prestressing tension steel material is stretched by being tensioned,
The connecting material, which is fixed to the steel material in the material axis direction and is rotatably attached around the material axis, is not affected by the rotation of the tension steel material itself and the rotation of the tensioning jack ram of the tension steel material. Moves exactly corresponding to the extension direction of.
而して前記連結材の先端部が、伸び検出計の先端に同検
出計の軸方向には固定され、且つ同検出計の軸まわりに
回転自在に連結させていることによって、前記連結材の
緊張鋼材の材軸方向の移動量が、正確に前記伸び検出計
の軸方向移動量として検出され、緊張鋼材自体の伸びが
測定されるものである。Thus, the tip of the connecting member is fixed to the tip of the elongation detector in the axial direction of the same detector, and is rotatably connected about the axis of the same detector. The amount of movement of the tension steel material in the axial direction is accurately detected as the amount of movement of the elongation detector in the axial direction, and the elongation of the tension steel material itself is measured.
（実施例） 以下本発明を図示の実施例について説明する。(Examples) The present invention will be described below with reference to illustrated examples.
第１図乃至第３図に示す実施例において、（１）はスト
ランドよりなる緊張鋼材、（２）は同ストランド（１）
を緊張し、コンクリート部材にプレストレスを導入する
ジヤツキ（３）のラムで、前記ストランド（１）には棒
状の連結材（４）の基端部に一体に固定された門型金物
（５）の両側片（5a）に設けた溝孔部（６）が嵌合され
るとともに、同両側片（5a）間において、前記ストラン
ド（１）に固定金物（７）が嵌合固定され、かくして連
結材（４）はストランド（１）に対して材軸方向には固
定されるとともに、材軸まわりに回転自在なように取付
けられている。In the embodiment shown in FIGS. 1 to 3, (1) is a tensile steel material made of strands, (2) is the same strand (1)
A gate-shaped metal fitting (5) integrally fixed to the base end of a rod-shaped connecting material (4) on the strand (1) by a ram of jack (3) for tensioning and prestressing the concrete member. The groove holes (6) provided on both side pieces (5a) are fitted, and the fixed metal fitting (7) is fitted and fixed on the strand (1) between the both side pieces (5a), thus connecting. The material (4) is fixed to the strand (1) in the material axis direction and is attached so as to be rotatable around the material axis.
なお前記固定金物（７）は、ストランド（１）に嵌合す
る円筒体に止めねじ（7a）を螺装して構成されるか、或
いはまた紙挟みクリップ状の金具より構成される。The fixed metal object (7) is configured by screwing a setscrew (7a) on a cylindrical body fitted to the strand (1), or is also configured by a paper clip clip-like metal fitting.
（８）は軸方向にのみ運動が許容されるように構成され
たポテンシヨメーターの如き伸び検出計で、（９）は同
検出計（８）に嵌合された鞘管よりなるガイド金物で、
その先端中実部（9a）に固定された形取付金具（10）
の透孔に、前記検出計（８）の検出軸（8a）が回転自在
に遊挿され、同検出軸（8a）の前記取付金具（10）を挟
む両側に抜け止めのダブルナツト（8b）が装着されてい
る。更に前記中実部（9a）におけるガイド金物（９）の
直径方向に設けられた貫通孔（9b）に前記連結材（４）
が昇降自在に貫挿され、かくして同連結材（４）は前記
伸び検出計（８）に、その軸方向には固定され、軸まわ
りには回転可能に連結されている。(8) is an elongation detector such as a potentiometer which is configured to allow movement only in the axial direction, and (9) is a guide metal member composed of a sheath tube fitted to the detector (8). ,
Shape mounting bracket (10) fixed to the tip solid part (9a)
The detection shaft (8a) of the detection meter (8) is rotatably inserted into the through hole of the detection meter (8), and double nuts (8b) are attached to both sides of the detection shaft (8a) sandwiching the mounting bracket (10). It is installed. Furthermore, the connecting member (4) is inserted into the through hole (9b) provided in the diametrical direction of the guide hardware (9) in the solid portion (9a).
Is vertically pierced so that the connecting member (4) is fixed to the elongation detector (8) in the axial direction thereof and is rotatably connected around the shaft.
図中（11）は連結材（４）の先端に装着されたストツパ
金物、（12）（13）はジヤツキ本体に装着されたガイ
ド、及び伸び検出計固定金物、（19）はプリングヘツド
である。In the figure, (11) is a stopper metal piece attached to the tip of the connecting material (4), (12) and (13) are guides attached to the main body of the jack, and an extension detector fixing metal piece, and (19) is a pulling head. .
図示の実施例は前記したように構成されているので、ス
トランド（１）をジヤツキラムによって緊張し、梁
（Ａ）にプレストレスを導入する際、ストランド（１）
の伸びに伴って連結材（４）がストランド（１）の回
転、ジヤツキラム（２）の回転に影響を受けることなく
ストランド（１）の伸び量だけ正確に同ストランド
（１）の材軸方向に移動し、この移動量が連結材（４）
の先端部と伸び検出計（８）のガイド金物（９）先端部
の連結部を介して同ガイド金物（９）に前記検出計
（８）の軸方向の移動量として伝達され、同ガイド金物
（９）を介して伸び検出計（８）にこの移動量が検出さ
れて伸び表示形（Ｂ）に表示され、かくしてストランド
（１）の伸びが正確に計測される。Since the illustrated embodiment is configured as described above, when the strand (1) is tensioned by the jack ram and prestress is introduced into the beam (A), the strand (1)
As the connecting material (4) is not affected by the rotation of the strand (1) and the rotation of the jack ram (2) in accordance with the elongation of the strand, the amount of elongation of the strand (1) is exactly in the axial direction of the strand (1). It moves and this amount of movement is the connecting material (4)
It is transmitted to the guide metal fitting (9) as a moving amount in the axial direction of the detector (8) via a connecting portion between the tip end of the guide and the guide metal fitting (9) of the elongation detector (8), and the guide metal fitting. This movement amount is detected by the elongation detector (8) via (9) and displayed on the elongation display type (B), and thus the elongation of the strand (1) is accurately measured.
第４図乃至第６図は本発明の他の実施例を示し、ストラ
ンド（１）に嵌装され、止め具（７′ａ）を介して固定
された固定金物（７′）の中間に設けた環状凹溝（７′
ｂ）に、板状の連結材（４）の下端に設けた溝孔（４′
ａ）が回転自在に嵌合し、同連結材（４′）に設けた長
手方向に伸びるスリット（4h）に伸び検出計（８）の可
動部（９′）の先端に螺装された締付桿（15）が可摺動
的に遊挿され、連結材（４′）が同可動部（９′）にそ
の軸まわりに回動自在に連結されている。図中（16）は
押え金物である。4 to 6 show another embodiment of the present invention, which is provided in the middle of the fixed metal fitting (7 ') fitted to the strand (1) and fixed through the stopper (7'a). Annular groove (7 '
b), a slot (4 ') provided at the lower end of the plate-like connecting member (4).
a) is rotatably fitted, and is tightened by a slit (4h) extending in the longitudinal direction provided on the connecting member (4 ') and screwed to the tip of the movable portion (9') of the elongation detector (8). The attached rod (15) is slidably slidably inserted, and the connecting member (4 ') is connected to the movable portion (9') rotatably around its axis. In the figure, (16) is a presser foot.
図中前記実施例と均等部分には同一符号が附されてい
る。In the figure, the same parts as those in the above embodiment are designated by the same reference numerals.
（発明の効果） 本発明によれば前記したように、プレストレストコンク
リート工事における緊張鋼材及び伸び検出計の先端に、
連結材の両端が夫々緊張鋼材及び伸び検出計の軸方向に
は固定され、軸まわりには回転自在に、且つ同軸の直交
方向に可摺動的に連結されたことによって、ジヤツキラ
ムや緊張鋼材の回転の影響を受けることなく、同緊張鋼
材の正確な伸びを検出し、プレストレストコンクリート
工事における緊張鋼材の緊張管理を正確に実施すること
ができる。(Effect of the invention) According to the present invention, as described above, at the tip of the tension steel material and the elongation detector in the prestressed concrete construction,
Both ends of the connecting material are fixed in the axial direction of the tension steel material and the elongation detector, respectively, and are rotatably connected around the axis and slidably connected in the coaxial orthogonal direction, so that the jack ram and the tension steel material are It is possible to detect the accurate elongation of the same tension steel material without being affected by the rotation and accurately perform the tension management of the tension steel material in prestressed concrete construction.
また前記連結材が前記検出計の検出軸先端に同軸の直交
方向に可摺動的に連結されているので、プレストレス導
入用緊張鋼材の位置に対応して、本装置を装着すること
ができる。Further, since the connecting member is slidably connected to the tip of the detection shaft of the detector in the coaxial orthogonal direction, the present device can be mounted in correspondence with the position of the prestressing tension steel material. .
第１図は本発明に係るプレストレストコンクリート工事
における緊張鋼材の伸び測定装置の一実施例を示す１部
縦断側面図、第２図及び第３図はその側面図並に平面
図、第４図は本発明の他の実施例を示す側面図、第５図
はその正面図、第６図はストランドに対する固定金物の
取付状態を示す斜面図である。 （１）……ストランド、（２）……ジヤツキラム、 （３）……ジヤツキ、（４）（４′）……連結材、 （８）……伸び検出計、（９）……ガイド金物FIG. 1 is a side view of a longitudinal section of a part showing an embodiment of an apparatus for measuring the elongation of a tensile steel material in prestressed concrete work according to the present invention, FIGS. 2 and 3 are side views and a plan view, and FIG. FIG. 5 is a side view showing another embodiment of the present invention, FIG. 5 is a front view thereof, and FIG. 6 is a perspective view showing a mounting state of a fixed metal object on a strand. (1) …… Strand, (2) …… Jacky ram, (3) …… Jacky, (4) (4 ′) …… Connecting material, (8) …… Extension detector, (9) …… Guide hardware
Claims (3)
材の材軸方向に固定され、且つ材軸まわりに回転可能に
装着された連結材の先端を、前記緊張鋼材の軸方向にの
み運動が許容されるように構成された伸び検出計の検出
軸に、同検出軸の軸方向には固定するとともに、同検出
軸の軸まわりに回転自在に、且つ同軸の直交方向に可摺
動的に連結してなることを特徴とするプレストレストコ
ンクリート工事における緊張鋼材の伸び測定装置。1. A prestressing tension steel material is fixed in the axial direction of the tension steel material, and the tip of a connecting member mounted rotatably around the material axis is moved only in the axial direction of the tension steel material. Is fixed to the detection shaft of an elongation detector configured to allow the rotation of the detection shaft in the axial direction, and is rotatable about the detection shaft and slidable in the coaxial orthogonal direction. An elongation measuring device for tensioned steel materials in prestressed concrete construction, characterized by being connected to.
に設けた貫通孔に可摺動的に貫挿され、同連結桿の他端
に設けた門型片における両側片間に、前記緊張鋼材に嵌
合固定した固定金物を介して緊張鋼材を固定した特許請
求の範囲に記載のプレストレストコンクリート工事にお
ける緊張鋼材の伸び測定装置。2. One end of the connecting member is slidably inserted into a through hole provided in the diametrical direction of the detection shaft, and between both side pieces of a gate-shaped piece provided at the other end of the connecting rod, The tension steel material elongation measuring device in prestressed concrete construction according to claim 1, wherein the tension steel material is fixed through a fixed metal fitting fitted and fixed to the tension steel material.
リットに伸び検出計の可動部先端に螺装された締付桿が
遊挿され、前記連結材の下端に設けた溝孔を前記緊張鋼
材の中間に固定された固定金具に回転自在に嵌合した特
許請求の範囲記載のプレストレストコンクリート工事に
おける緊張鋼材の伸び測定装置。3. A fastening rod screwed to the tip of the movable portion of the elongation detector is loosely inserted into a slit extending in the longitudinal direction provided in the plate-like connecting member, and a slot provided at the lower end of the connecting member is formed. An elongation measuring device for a tensile steel material in prestressed concrete construction according to claim 1, which is rotatably fitted to a fixing member fixed in the middle of the tensile steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62304564A JPH0769129B2 (en) | 1987-12-03 | 1987-12-03 | Elongation measuring device for tension steel in prestressed concrete work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62304564A JPH0769129B2 (en) | 1987-12-03 | 1987-12-03 | Elongation measuring device for tension steel in prestressed concrete work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01147302A JPH01147302A (en) | 1989-06-09 |
| JPH0769129B2 true JPH0769129B2 (en) | 1995-07-26 |
Family
ID=17934512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62304564A Expired - Lifetime JPH0769129B2 (en) | 1987-12-03 | 1987-12-03 | Elongation measuring device for tension steel in prestressed concrete work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0769129B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4972736B2 (en) * | 2000-11-30 | 2012-07-11 | 株式会社ジオフロント | Measuring device for PC steel wire as tensile material in anchor method |
| JP7078517B2 (en) * | 2018-11-07 | 2022-05-31 | 高周波熱錬株式会社 | Steel rod elongation measuring device and steel rod elongation measuring method |
| CN112936137B (en) * | 2021-02-06 | 2022-04-22 | 徐州工业职业技术学院 | Steel construction prestressing force detection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59155503U (en) * | 1983-04-06 | 1984-10-18 | 小松ゼノア株式会社 | Pump shaft movement detection device |
-
1987
- 1987-12-03 JP JP62304564A patent/JPH0769129B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01147302A (en) | 1989-06-09 |
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