JP2000017839A - Tension device for prestressing wire - Google Patents
Tension device for prestressing wireInfo
- Publication number
- JP2000017839A JP2000017839A JP20582798A JP20582798A JP2000017839A JP 2000017839 A JP2000017839 A JP 2000017839A JP 20582798 A JP20582798 A JP 20582798A JP 20582798 A JP20582798 A JP 20582798A JP 2000017839 A JP2000017839 A JP 2000017839A
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- actuator
- concrete product
- wire
- prestressing
- 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.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は狭隘な場所でも緊張
作業が可能なＰＣ鋼線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 tensioning device for a PC steel wire which can be tensioned even in a narrow place.
【０００２】[0002]
【従来の技術】長さ数１０メートルにも及ぶ橋桁などの
コンクリート製品は、限られた工場の屋外敷地内で長手
方向に並べられており、各コンクリート製品の間の通路
幅は約４０ｃｍしか確保できない場合がある。上述のよ
うなコンクリート製品のシースへＰＣ鋼線を通したうえ
ＰＣ鋼線に引張荷重を加える場合に、通路に配置したア
クチユエータにより、ＰＣ鋼線の端末をそのまま真直ぐ
に引つ張ることができない場合がある。つまり、図３に
示すように、数１０ｍもの長尺なコンクリート製品２の
シースへ通したＰＣ鋼線に引張荷重を加えると、ＰＣ鋼
線の伸びは数１０ｃｍにも及ぶから、僅か幅Ｗが４０ｃ
ｍ程度の通路ではアクチユエータ９が隣りのコンクリー
ト製品２Ａに当たり、それ以上ＰＣ鋼線６を引つ張るこ
とができない。2. Description of the Related Art Concrete products such as bridge girders that are several tens of meters in length are arranged in a longitudinal direction on a limited outdoor site of a factory, and a passage width between each concrete product is only about 40 cm. It may not be possible. When a PC steel wire is passed through the sheath of a concrete product as described above and a tensile load is applied to the PC steel wire, the actuator placed in the passage cannot directly pull the end of the PC steel wire as it is. There is. That is, as shown in FIG. 3, when a tensile load is applied to a PC steel wire passed through the sheath of a long concrete product 2 of several tens of meters, the elongation of the PC steel wire extends to several tens of cm. 40c
In the passage of about m, the actuator 9 hits the adjacent concrete product 2A, and the PC steel wire 6 cannot be pulled any further.
【０００３】[0003]
【発明が解決しようとする課題】本発明の課題は上述の
問題に鑑み、ＰＣ鋼線の端末を真直ぐでなく、湾曲させ
ながらアクチユエータにより引き出すことにより、狭隘
な場所でも緊張作業を可能にするＰＣ鋼線の緊張装置を
提供することにある。SUMMARY OF THE INVENTION In view of the above-mentioned problems, the object of the present invention is to make a PC steel wire terminal not straight but to be pulled out by an actuator while bending it, thereby enabling a tension work even in a narrow place. An object of the present invention is to provide a steel wire tensioning device.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明の構成はコンクリート製品に設けたシースへ
ＰＣ鋼線を挿通し、ＰＣ鋼線の一端をコンクリート製品
の一端に支持した定着具に固定し、ＰＣ鋼線の他端をコ
ンクリート製品の他端に支持した定着具と複数のブロツ
クとを経てアクチユエータに接続し、該アクチユエータ
により緊張力を付与するＰＣ鋼線の緊張装置において、
前記ブロツクの両端面は鋼線挿通孔の中心軸線に関して
互いに反対側へ傾斜され、前記鋼線挿通孔の両端部分の
内径が拡大されていることを特徴とする。In order to solve the above-mentioned problems, according to the present invention, a PC steel wire is inserted into a sheath provided on a concrete product, and one end of the PC steel wire is supported on one end of the concrete product. In the tensioning device for a PC steel wire, the PC steel wire is connected to an actuator via a fixing tool having the other end of the PC steel wire supported on the other end of the concrete product and a plurality of blocks, and the actuator applies tension.
Both end surfaces of the block are inclined to opposite sides with respect to the center axis of the steel wire insertion hole, and the inside diameter of both ends of the steel wire insertion hole is enlarged.
【０００５】[0005]
【発明の実施の形態】本発明ではコンクリート製品の端
部の定着具から引き出されるＰＣ鋼線の端末を、そろば
ん玉に似た複数のブロツクに挿通し、ＰＣ鋼線の端末を
円弧状に湾曲させてアクチユエータに接続して引張荷重
を加える。例えば、アクチユエータを吊り上げるなどし
て、ＰＣ鋼線の端末を通路方向へ湾曲させるか上方へ湾
曲させれば、狭隘な通路でも緊張作業が可能になる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the end of a PC steel wire drawn from a fixing tool at the end of a concrete product is inserted into a plurality of blocks similar to an abacus ball, and the end of the PC steel wire is curved in an arc shape. Then, it is connected to the actuator and a tensile load is applied. For example, if the terminal of the PC steel wire is bent in the direction of the passage or bent upward by, for example, lifting the actuator, a tensioning operation can be performed even in a narrow passage.
【０００６】[0006]
【実施例】図１は本発明のＰＣ鋼線６の緊張装置による
作業状態を示す平面図である。ＰＣ鋼線６はコンクリー
ト製品２を貫通するシース２ａへ挿通し、一方の端末６
ａをコンクリート製品２の端部２ｂに支持した定着具３
へ固定される。ＰＣ鋼線６の他方の端末６ｂはコンクリ
ート製品２の端部２ｃに支持した定着具１３を貫通し、
さらに本発明による多数のブロツク２１を貫通し、アク
チユエータ９のラムチヤツクに結合される。アクチユエ
ータ９はシリンダにピストンを嵌装して油室を形成して
なり、油室へ入口９ａから油圧ポンプにより高圧油を供
給すれば、ＰＣ鋼線６の端末６ｂが引つ張られる。1 is a plan view showing a working state of a PC steel wire 6 according to the present invention using a tensioning device. The PC steel wire 6 is inserted into the sheath 2a penetrating the concrete product 2, and the one end 6
Fixing device 3 supporting a at end 2b of concrete product 2
Fixed to. The other end 6b of the PC steel wire 6 penetrates the fixing device 13 supported on the end 2c of the concrete product 2,
Furthermore, it penetrates a number of blocks 21 according to the invention and is connected to a lamb chuck of the actuator 9. The actuator 9 has an oil chamber formed by fitting a piston into a cylinder. When high-pressure oil is supplied to the oil chamber from the inlet 9a by a hydraulic pump, the terminal 6b of the PC steel wire 6 is pulled.
【０００７】図２に示すように、ブロツク２１は円柱体
の両端部を中心軸線３１に対して約６０°の斜面でカツ
トしてなり、中心軸線３１に沿つて鋼線挿通孔２３が設
けられ、鋼線挿通孔２３の両端部の孔２２は内径を拡大
される。As shown in FIG. 2, the block 21 is formed by cutting both ends of a cylindrical body at a slope of about 60.degree. With respect to the central axis 31. A steel wire insertion hole 23 is provided along the central axis 31. As shown in FIG. The inner diameter of the holes 22 at both ends of the steel wire insertion hole 23 is enlarged.
【０００８】上述の構成をなすブロツク２１にＰＣ鋼線
６の端末６ｂを挿通したうえアクチユエータ９に接続
し、端末６ｂに引張荷重を加えると、相隣接するブロツ
ク２１の端面２１ａが相互に接し、端末６ｂが円弧状に
湾曲される。ＰＣ鋼線６はブロツク２１の鋼線挿通孔２
３に対し軸方向摺動可能であり、大径孔２２では隣接す
るブロツク２１の大径孔２２との間で湾曲可能である。When the terminal 6b of the PC steel wire 6 is inserted into the block 21 having the above-described configuration and connected to the actuator 9, and a tensile load is applied to the terminal 6b, the end faces 21a of the adjacent blocks 21 come into contact with each other. The terminal 6b is curved in an arc shape. The PC steel wire 6 is the steel wire insertion hole 2 of the block 21.
3 can be slid in the axial direction, and the large-diameter hole 22 can bend between the large-diameter hole 22 of the adjacent block 21.
【０００９】ＰＣ鋼線６に所要の引張荷重が加えられた
時、ＰＣ鋼線６は定着具１３の３分割体からなるくさび
（図１に示す定着具３のくさび４と同じ）に挟持され、
かつ円錐状の座へ強く押し付けられ、ＰＣ鋼線６に所定
の引張荷重が維持される。そこで、出口９ｂからアクチ
ユエータ９の油圧を解放し、アクチユエータ９とブロツ
ク２１をＰＣ鋼線６から外す。When a required tensile load is applied to the PC steel wire 6, the PC steel wire 6 is sandwiched between wedges (same as the wedges 4 of the fixing device 3 shown in FIG. 1) formed of the fixing device 13 divided into three parts. ,
And it is strongly pressed against the conical seat, and the PC steel wire 6 is maintained at a predetermined tensile load. Then, the hydraulic pressure of the actuator 9 is released from the outlet 9b, and the actuator 9 and the block 21 are detached from the PC steel wire 6.
【００１０】本発明によれば、多数のブロツク２１の両
端面２１ａが中心軸線３１に対して斜めにカツトされ、
該ブロツク２１に端末６ｂを挿通したうえアクチユエー
タ９により引張荷重を加えるものであるから、第１のブ
ロツク２１がコンクリート製品２の端部２ｃの定着具１
３に接し、続くブロツク２１が端面２１ａで相互に接
し、結果としてＰＣ鋼線６が円弧状に湾曲される。した
がつて、アクチユエータ９を例えば通路の長手方向へ引
き出すか、クレーンなどで吊り上げることにより、狭隘
な通路でもＰＣ鋼線の緊張作業が可能になる。According to the present invention, both end faces 21a of a large number of blocks 21 are cut obliquely with respect to the central axis 31.
Since the terminal 6b is inserted through the block 21 and a tensile load is applied by the actuator 9, the first block 21 is used to fix the fixing device 1 at the end 2c of the concrete product 2.
3, the subsequent blocks 21 contact each other at the end face 21a, and as a result, the PC steel wire 6 is curved in an arc shape. Accordingly, by pulling out the actuator 9 in, for example, the longitudinal direction of the passage or lifting it up with a crane or the like, the tension work of the PC steel wire can be performed even in a narrow passage.
【００１１】[0011]
【発明の効果】本発明は上述のように、コンクリート製
品に設けたシースへＰＣ鋼線を挿通し、ＰＣ鋼線の一端
をコンクリート製品の一端に支持した定着具に固定し、
ＰＣ鋼線の他端をコンクリート製品の他端に支持した定
着具と複数のブロツクとを経てアクチユエータに接続
し、該アクチユエータにより緊張力を付与するＰＣ鋼線
の緊張装置において、前記ブロツクの両端面は鋼線挿通
孔の中心軸線に関して互いに反対側へ傾斜され、前記鋼
線挿通孔の両端部分の内径が拡大されているから、前記
ブロツクに前記ＰＣ鋼線の端末を挿通したうえアクチユ
エータにより緊張力を加えると、各ブロツクがコンクリ
ート製品の端部の定着具とアクチユエータとの間で円弧
状に並び、ＰＣ鋼線が円弧状に湾曲される。したがつ
て、アクチユエータを例えばクレーンで吊り上げること
により、狭隘な通路でもＰＣ鋼線の緊張作業が可能にな
る。As described above, according to the present invention, a PC steel wire is inserted into a sheath provided on a concrete product, and one end of the PC steel wire is fixed to a fixing device supported on one end of the concrete product.
In a tensioning device for a PC steel wire, wherein the other end of the PC steel wire is connected to an actuator via a fixing device which is supported on the other end of the concrete product and a plurality of blocks, and the actuator applies tension thereto, both end faces of the block are provided. Are inclined to the opposite sides with respect to the center axis of the steel wire insertion hole, and the inner diameters of both ends of the steel wire insertion hole are enlarged, so that the end of the PC steel wire is inserted into the block and tension is applied by the actuator. Is added, each block is arranged in an arc between the fixing device at the end of the concrete product and the actuator, and the PC steel wire is curved in an arc. Therefore, by lifting the actuator with, for example, a crane, the tensioning operation of the PC steel wire can be performed even in a narrow passage.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明に係るＰＣ鋼線の緊張装置の側面断面図
である。FIG. 1 is a side sectional view of a tensioning device for a PC steel wire according to the present invention.
【図２】同緊張装置に使用されるブロツクの側面断面図
である。FIG. 2 is a side sectional view of a block used in the tensioning device.
【図３】従来のＰＣ鋼線の緊張装置の使用状態を示す平
面図である。FIG. 3 is a plan view showing a use state of a conventional tensioning device for a PC steel wire.
２：コンクリート製品 ２ａ：シース ３：定着具
６：ＰＣ鋼線 ６ａ：端末 ６ｂ：端末 ９：アクチユエータ ９ａ：入口 ９ｂ：
出口 １３：定着具 ２１：ブロツク ２１ａ：端面 ２２：大径孔 ２３：
鋼線挿通孔 ３１：中心軸線2: Concrete product 2a: Sheath 3: Fixing tool
6: PC steel wire 6a: Terminal 6b: Terminal 9: Actuator 9a: Inlet 9b:
Exit 13: Fixing tool 21: Block 21a: End face 22: Large diameter hole 23:
Steel wire insertion hole 31: Center axis
Claims (1)
線を挿通し、ＰＣ鋼線の一端をコンクリート製品の一端
に支持した定着具に固定し、ＰＣ鋼線の他端をコンクリ
ート製品の他端に支持した定着具と複数のブロツクとを
経てアクチユエータに接続し、該アクチユエータにより
緊張力を付与するＰＣ鋼線の緊張装置において、前記ブ
ロツクの両端面は鋼線挿通孔の中心軸線に関して互いに
反対側へ傾斜され、前記鋼線挿通孔の両端部分の内径が
拡大されていることを特徴とする、ＰＣ鋼線の緊張装
置。1. A PC steel wire is inserted into a sheath provided on a concrete product, one end of the PC steel wire is fixed to a fixing tool supported on one end of the concrete product, and the other end of the PC steel wire is connected to the other end of the concrete product. A tensioning device for a PC steel wire, which is connected to an actuator via a fixing tool and a plurality of blocks supported by the actuator and applies tension by the actuator, both end surfaces of the block are opposite to each other with respect to the center axis of the steel wire insertion hole. Characterized in that the inner diameter of both ends of the steel wire insertion hole is enlarged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20582798A JP3755993B2 (en) | 1998-07-06 | 1998-07-06 | PC steel wire bending tension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20582798A JP3755993B2 (en) | 1998-07-06 | 1998-07-06 | PC steel wire bending tension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000017839A true JP2000017839A (en) | 2000-01-18 |
| JP3755993B2 JP3755993B2 (en) | 2006-03-15 |
Family
ID=16513376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20582798A Expired - Fee Related JP3755993B2 (en) | 1998-07-06 | 1998-07-06 | PC steel wire bending tension device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3755993B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210051378A (en) * | 2019-10-30 | 2021-05-10 | 서울시립대학교 산학협력단 | Multi-angle jacking device introducing prestressing force of steel strands by hinge module |
-
1998
- 1998-07-06 JP JP20582798A patent/JP3755993B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210051378A (en) * | 2019-10-30 | 2021-05-10 | 서울시립대학교 산학협력단 | Multi-angle jacking device introducing prestressing force of steel strands by hinge module |
| KR102266454B1 (en) * | 2019-10-30 | 2021-06-16 | 서울시립대학교 산학협력단 | Multi-angle jacking device introducing prestressing force of steel strands by hinge module |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3755993B2 (en) | 2006-03-15 |
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