JP2004316205A - Pc (prestressed concrete) connecting device - Google Patents

Pc (prestressed concrete) connecting device Download PDF

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Publication number
JP2004316205A
JP2004316205A JP2003110470A JP2003110470A JP2004316205A JP 2004316205 A JP2004316205 A JP 2004316205A JP 2003110470 A JP2003110470 A JP 2003110470A JP 2003110470 A JP2003110470 A JP 2003110470A JP 2004316205 A JP2004316205 A JP 2004316205A
Authority
JP
Japan
Prior art keywords
steel
steel material
connecting device
torque
wedge
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
Application number
JP2003110470A
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Japanese (ja)
Inventor
Koji Ishii
浩司 石井
Shigeo Takahashi
重夫 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Metal Industry Co Ltd
PS Mitsubishi Construction Co Ltd
Original Assignee
Suzuki Metal Industry Co Ltd
PS Mitsubishi Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Metal Industry Co Ltd, PS Mitsubishi Construction Co Ltd filed Critical Suzuki Metal Industry Co Ltd
Priority to JP2003110470A priority Critical patent/JP2004316205A/en
Publication of JP2004316205A publication Critical patent/JP2004316205A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To connect PC steel members in the extended direction of PC steel taking no space without mounting a separate connecting implement to the torque-tensed PC steel member. <P>SOLUTION: This PC connecting device is provided with a PC steel strand anchor sleeve 11 with a built-in wedge 12 at one end, and an internal screw 13 for tension-anchoring the PC steel member 21, at the other end. Hexagonal shape engaged with a torque wrench for tensing the PC steel member 21 by twisting the internal screw 13 is formed at an outline 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、PC構造物に用いられ、PC鋼材を緊張定着すると共にPC鋼材をさらに延長方向に連結する機構を備えた、PC連結装置に関する。
【0002】
【従来の技術】
橋梁などPC構造物に使用するPC鋼材にはPC鋼より線とPC鋼棒がある。これらのPC鋼材を緊張する場合、油圧ジャッキを用い、油圧ジャッキのラムにPC鋼材を掴持させ、PC鋼材を牽引して緊張し、定着部材を用いて支圧板に定着するのが通常である。このような、油圧ジャッキは、センターホールジャッキ又はラムチエアを用いる大型ジャッキであり、寸法的に大きく、また、重量物である。したがって、PC鋼より線を緊張する場合、広い作業空間と重量物であるジャッキを保持させる装置が必要となる。このため、施工条件によっては大きな施工上の制約を受ける。
【0003】
近年、PC鋼材をトルクレンチによって緊張する技術が開発されている。この技術は、PC鋼棒であれば、雄ねじにナットを螺合し、PC鋼より線であれば、PC鋼より線の端部に雄ねじを持つグリッパを固定し、この雄ねじにナットを螺合し、このナットをロングソケットとトルクレンチで回転させてPC鋼材を緊張する技術である。これら緊張されたPC鋼材を緊張定着した後、さらに延長方向にPC鋼材を延長する場合には、緊張後にPC鋼材の延出した雄ねじに連結装置を装着し、延長方向のPC鋼材をこの連結装置に連結するのが現状である。この場合、連結装置を装着させるためのスペースが余分に必要であり、装着時間が必要となる。
【0004】
本発明者らは先に、PC鋼より線に雄ねじを備えたグリッパを固定してナットをトルクレンチで締め付け、さらにPC鋼より線を連結する連結装置を取付けてPC鋼より線を延長する技術を開示している。(例えば、特許文献1参照。)。この技術の説明図として一端にくさびを内蔵したPC鋼より線定着スリーブを備え、他端にPC鋼材の緊張定着用雌ねじを備えた連結具が記載されている。この連結具はPC鋼材を緊張する機能を備えたものではない。
【0005】
【特許文献1】
特開2001−173385号公報(明細書4頁右欄43行〜5頁左欄2行目、図9〜図10)
【0006】
【発明が解決しようとする課題】
従来、トルク緊張したPC鋼材にさらに延長方向にPC鋼材を連結する場合、緊張後に連結装置を装着する。このような連結具は、延長方向に取り付けるPC鋼材が同径の雄ねじを有するPC鋼材であれば、カプラを用いて連結する。また、延長方向に取り付けるPC鋼材がPC鋼より線である場合には、くさびを内蔵したPC鋼より線定着スリーブを一端に備えた連結具を使用する。この技術を採用すると、装着する時間を要すると言う問題、装着するためのスペースがさらに必要となるという問題がある。
【0007】
本発明は、上記問題点を解決することを目的とし、トルク緊張されたPC鋼材に改めて連結具を装着することなく、かつ、スペースをとらずに延長方向にPC鋼材を連結することが可能な連結装置を提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明は、上記問題を解決するためになされたものであって、PC鋼材のトルク緊張機能を兼ね備えた連結装置であって、緊張したPC鋼材をさらに延長方向にPC鋼材を連結する装置である。この連結装置はトルクによりPC鋼材を緊張することが可能な形状を有しており、かつ、延長方向にPC鋼より線を連結することができる機能を有している。
【0009】
本発明は、一端にくさびを内蔵したPC鋼より線定着スリーブを備え、他端にPC鋼材の緊張定着用雌ねじ及び支圧面を備え、外周に前記雌ねじを捻回してPC鋼材を緊張するトルク付与部を設けたことを特徴とする緊張可能な連結装置である。
【0010】
前記トルク付与部としは、4角形その他の多角形、平行2面からなるスパナ係止形状等でもよいが、トルクレンチの先端に嵌合する6角形状(ナット状)とし、トルクレンチで捻回するようにすると好適である。トルクレンチで捻回するには、少なくとも前記連結装置の前記PC鋼より線定着スリーブ側の端部近傍にトルクレンチのボックススパナに係合する係合部、すなわち、外周形状が6角形状(ナット状)の係合部を設ければよい。
【0011】
【発明の実施の形態】
以下図面を参照して本発明の実施の形態を説明する。
【0012】
先ず、図3を参照して従来技術について説明する。コンクリート構造物100の孔101内に挿通されたPC鋼材21はPC鋼より線であって、雄ねじ23を外径に形成したグリッパ22を端部に取付けている。PC鋼材21がPC鋼棒である場合にはその端部に形成された雄ねじをそのまま用いる。雄ねじ22に螺合する緊張用ナット43は座金42を介して支圧板41に当接し、捻回することによって支圧板41に反力を支持されて、PC鋼材21に緊張力を付与する。この緊張力により支圧板41はコンクリート100の端面に圧着される。
【0013】
この緊張用ナット43の捻回、締付けはトルクレンチによっててなされる。PC鋼材21を緊張してナット43を支圧板41に定着した後、雄ねじ22の先端側に連結装置50をねじ込む。PC鋼材を延長するための連結装置50は、スリーブ51内にくさび52を保有し、このスリーブ51は既設PC鋼材21側の端部に連結金具53が取付られている。連結金具53は緊張定着したPC鋼材の端部雄ねじに螺合する雌ねじとスリーブ51の尾部内径に設けた雌ねじに螺合する雄ねじを備えている。連結金具53の雌ねじを既設PC鋼材21のグリッパ22の雄ねじ23に捻じ込み、連結装置50をグリッパ22と連結した後、他端側から延長すべきPC鋼材(PC鋼より線)31を連結装置50のスリーブ51中に押込み挿入する。この挿入時に、ばね54が縮少し、くさび52の内径を拡大させてPC鋼材31をくさび内に挿入し、その後PC鋼材31を緊張方向に引抜くように力を加えると、くさび52がPC鋼材(より線)31の外径をグリップし、くさびの原理により抜出しを防止する。このような従来の連結装置50は、PC鋼材21の緊張定着の後、人手によりグリッパ22に捻じ込み、PC鋼材をPC鋼材21の延出方向に連結してPC鋼材の延長に供される。
【0014】
図1は改善された本発明の実施例のPC連結装置10の断面図である。本発明のPC連結装置10は一端にくさび12を内蔵したPC鋼より線定着スリーブ11を備え、他端にPC鋼材21の緊張定着用雌ねじ13及び支圧面を備え、外周に前記雌ねじ13を捻回してPC鋼材21を緊張するトルク付与部を設けたことを特徴とするPC連結装置10である。図2にこのPC連結装置10の外形を斜視図で例示した。
【0015】
本発明の実施例のPC連結装置10は、外形の少なくとも一端にはトルクトレンチのボックススパナが係合する6角ナット状の外形15を有している。図2に示す実施例は全長に亘って6角形となっているが、少なくとも内蔵スリーブ11の開放端側のみにボックススパナが係合するに充分な長さの6角部があればよい。このPC連結装置10は内部にPC鋼材を掴持するくさび12を内蔵したスリーブ11を備え、他端にグリッパ22の雄ねじ23と螺合する雌ねじ13を備えている。
【0016】
図5は互いに連結する雄ねじ同士に螺合する雌ねじ61、62を備え、PC鋼材を連結するカプラ60である。外形は円形であり、捻回用ピン孔63を備えている。図4は改善されたカプラ60の例を示す斜視図で外形65が6角形のナット状をなし、トルクレンチ等により容易に回転させ、締付、取外しができるようになっている。ピン孔64は、手動回転用ピンを挿す孔であると共に、トルクレンチによる捻じ込みすぎを防止するストッパピン挿入孔を兼ねたものである。
【0017】
【発明の効果】
本発明によればPC鋼材をトルクレンチにより緊張し、同時に延長方向に延出するPC鋼材を連結することが可能である。
【図面の簡単な説明】
【図1】実施例の縦断面図である。
【図2】実施例の斜視図である。
【図3】従来例の縦断面図である。
【図4】他の実施例の斜視図である。
【図5】従来例の斜視図である。
【符号の説明】
10 連結装置
11 スリーブ
12 くさび
13 雌ねじ
14 スプリング
15 外形
21 PC鋼材(PC鋼より線)
22 グリッパ
23 雄ねじ
31 PC鋼材
41 支圧板
42 ワッシャ
43 ナット
50 連結装置
51 スリーブ
52 くさび
53 連結金具
54 ばね
60 カプラ
61、62 雌ねじ
63 ピン孔
64 ピン孔
65 外形
100 コンクリート
101 孔
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a PC connecting device that is used for a PC structure and has a mechanism for tension-fixing a PC steel material and further connecting the PC steel material in an extension direction.
[0002]
[Prior art]
PC steel materials used for PC structures such as bridges include PC steel strands and PC steel rods. When these PC steel materials are tensioned, it is usual to use a hydraulic jack, hold the PC steel material on the ram of the hydraulic jack, pull the PC steel material, tension it, and fix it to the bearing plate using a fixing member. . Such a hydraulic jack is a large jack using a center hole jack or a ramchi air, and is large in size and heavy. Therefore, when tensioning a PC steel strand, a device for holding a wide working space and a jack, which is a heavy object, is required. For this reason, there are great restrictions on construction depending on construction conditions.
[0003]
In recent years, a technique of tensioning PC steel using a torque wrench has been developed. In this technology, a PC steel rod is screwed with a nut on a male screw, and a PC steel stranded wire is fixed with a gripper having a male screw at the end of the PC steel stranded wire, and a nut is screwed onto this male screw. Then, the nut is rotated with a long socket and a torque wrench to tension the PC steel. In order to extend the PC steel in the extension direction after the tensioned PC steel is tensioned and fixed, a connecting device is attached to the extended male screw of the PC steel after the tension, and the PC steel in the extension direction is connected to the connecting device. It is currently connected to. In this case, extra space is required for mounting the connecting device, and mounting time is required.
[0004]
The present inventors have previously developed a technique of fixing a gripper provided with an external thread to a PC steel strand, tightening a nut with a torque wrench, and attaching a connecting device for connecting the PC steel strand to extend the PC strand. Is disclosed. (For example, refer to Patent Document 1). As an explanatory view of this technology, a connecting tool having a PC stranded wire fixing sleeve having a wedge at one end and a female screw for tension fixing of a PC steel material at the other end is described. This connecting tool does not have a function of tensioning the PC steel material.
[0005]
[Patent Document 1]
JP-A-2001-173385 (page 43, right column, line 43 to page 5, left column, second line, FIGS. 9 to 10)
[0006]
[Problems to be solved by the invention]
Conventionally, when connecting a PC steel material to a torque-tensioned PC steel material further in the extension direction, a connecting device is attached after the tensioning. Such a connecting tool is connected using a coupler if the PC steel material attached in the extension direction is a PC steel material having the same diameter male screw. If the PC steel material to be attached in the extension direction is a PC steel stranded wire, a connecting tool having a wedge-incorporated PC steel stranded wire fixing sleeve at one end is used. When this technology is adopted, there is a problem that it takes a long time to mount, and a problem that further space for mounting is required.
[0007]
An object of the present invention is to solve the above-mentioned problems, and it is possible to connect a PC steel material in an extending direction without installing a connecting tool to the torque-tensioned PC steel material again and without taking up space. It is an object to provide a coupling device.
[0008]
[Means for Solving the Problems]
The present invention has been made to solve the above problem, and is a connection device having a function of tightening torque of a PC steel material, and a device for connecting a PC steel material in a direction in which the tensioned PC steel is further extended. . This connecting device has a shape capable of tensioning a PC steel material by a torque and has a function of connecting a PC steel stranded wire in an extending direction.
[0009]
The present invention provides a PC steel stranded wire fixing sleeve having a wedge at one end, a female screw for tension fixing of a PC steel material and a bearing surface at the other end, and a torque application for twisting the PC steel material by twisting the female screw on the outer periphery. It is a tensionable connection device characterized by including a portion.
[0010]
The torque applying portion may be a quadrilateral or other polygon, a wrench engaging shape composed of two parallel surfaces, or the like, but a hexagonal shape (nut shape) fitted to the tip of the torque wrench and twisted with a torque wrench. It is preferable to do so. In order to twist with a torque wrench, at least near the end of the coupling device on the side of the PC steel strand fixing sleeve, which engages with the box wrench of the torque wrench, that is, the outer peripheral shape is a hexagonal shape (nut ) May be provided.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
First, a conventional technique will be described with reference to FIG. The PC steel material 21 inserted into the hole 101 of the concrete structure 100 is a strand of PC steel, and has a gripper 22 formed with an external thread 23 having an outer diameter attached to an end. When the PC steel material 21 is a PC steel rod, the male screw formed at the end thereof is used as it is. The tensioning nut 43 screwed into the male screw 22 abuts on the support plate 41 via the washer 42, and is supported by the support plate 41 by twisting to apply tension to the PC steel 21. The support plate 41 is pressed against the end face of the concrete 100 by this tension.
[0013]
The tightening and tightening of the tension nut 43 is performed by a torque wrench. After tensioning the PC steel 21 and fixing the nut 43 to the support plate 41, the connecting device 50 is screwed into the distal end side of the male screw 22. The connecting device 50 for extending the PC steel material has a wedge 52 in a sleeve 51, and the sleeve 51 has a connecting metal fitting 53 attached to an end of the existing PC steel material 21. The connection fitting 53 includes a female screw that is screwed into a male screw at the end of the PC steel material that has been fixed in tension, and a male screw that is screwed into a female screw provided at the inner diameter of the tail of the sleeve 51. After the female screw of the connection fitting 53 is screwed into the male screw 23 of the gripper 22 of the existing PC steel material 21 to connect the connection device 50 to the gripper 22, the PC steel material (PC steel stranded wire) 31 to be extended from the other end side is connected. 50 is pushed into the sleeve 51 and inserted. At this time, when the spring 54 contracts, the inner diameter of the wedge 52 is enlarged and the PC steel material 31 is inserted into the wedge, and then the PC steel material 31 is subjected to a force to be pulled out in the tension direction, the wedge 52 becomes (Stranded wire) Grip the outer diameter of 31 to prevent pull-out by the wedge principle. In such a conventional connecting device 50, after the PC steel material 21 is tensioned and fixed, the PC steel material is manually screwed into the gripper 22, and the PC steel material is connected in the extending direction of the PC steel material 21 to be used for extension of the PC steel material.
[0014]
FIG. 1 is a sectional view of an improved PC connection device 10 according to an embodiment of the present invention. The PC coupling device 10 of the present invention includes a PC steel strand fixing sleeve 11 having a wedge 12 built in at one end, a tension fixing female screw 13 and a bearing surface of a PC steel material 21 at the other end, and the female screw 13 is screwed around the outer periphery. The PC connecting device 10 is provided with a torque applying portion for turning and twisting the PC steel material 21. FIG. 2 is a perspective view illustrating the outer shape of the PC connection device 10.
[0015]
The PC connection device 10 according to the embodiment of the present invention has a hexagon nut-shaped outer shape 15 with which a box spanner of a torque trench is engaged at at least one end of the outer shape. Although the embodiment shown in FIG. 2 has a hexagonal shape over the entire length, it is sufficient that at least only the open end side of the built-in sleeve 11 has a hexagonal portion long enough to engage the box spanner. The PC connecting device 10 includes a sleeve 11 having a wedge 12 for holding a PC steel material therein, and a female screw 13 screwed to a male screw 23 of a gripper 22 at the other end.
[0016]
FIG. 5 shows a coupler 60 that has female screws 61 and 62 that are screwed into male screws that are connected to each other, and that connects a PC steel material. The outer shape is circular, and has a pin hole 63 for twisting. FIG. 4 is a perspective view showing an example of the improved coupler 60. The outer shape 65 has a hexagonal nut shape, and can be easily rotated by a torque wrench or the like, and can be tightened and removed. The pin hole 64 is a hole for inserting a pin for manual rotation, and also serves as a stopper pin insertion hole for preventing over-twisting by a torque wrench.
[0017]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it is possible to connect a PC steel material extended in the extension direction at the same time that a PC steel material is tensioned with a torque wrench.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an embodiment.
FIG. 2 is a perspective view of the embodiment.
FIG. 3 is a longitudinal sectional view of a conventional example.
FIG. 4 is a perspective view of another embodiment.
FIG. 5 is a perspective view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Connecting device 11 Sleeve 12 Wedge 13 Female screw 14 Spring 15 Outline 21 PC steel (PC steel strand)
22 Gripper 23 Male Screw 31 PC Steel 41 Supporting Plate 42 Washer 43 Nut 50 Connecting Device 51 Sleeve 52 Wedge 53 Connecting Hardware 54 Spring 60 Coupler 61, 62 Female Screw 63 Pin Hole 64 Pin Hole 65 Outer Shape 100 Concrete 101 Hole

Claims (2)

一端にくさびを内蔵したPC鋼より線定着スリーブを備え、他端にPC鋼材の緊張定着用雌ねじ及び支圧面を備え、外周に前記雌ねじを捻回してPC鋼材を緊張するトルク付与部を設けたことを特徴とするPC連結装置。One end was provided with a PC steel stranded wire fixing sleeve with a built-in wedge, the other end was provided with a female screw for tension fixing of a PC steel material and a bearing surface, and a torque applying portion for twisting the female screw by twisting the female screw was provided on the outer periphery. A PC connection device characterized by the above-mentioned. 前記トルク付与部はトルクレンチと係合する6角形状であることを特徴とする請求項1記載のPC連結装置。The PC connection device according to claim 1, wherein the torque applying portion has a hexagonal shape that engages with a torque wrench.
JP2003110470A 2003-04-15 2003-04-15 Pc (prestressed concrete) connecting device Pending JP2004316205A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003110470A JP2004316205A (en) 2003-04-15 2003-04-15 Pc (prestressed concrete) connecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003110470A JP2004316205A (en) 2003-04-15 2003-04-15 Pc (prestressed concrete) connecting device

Publications (1)

Publication Number Publication Date
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Family Applications (1)

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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105350722A (en) * 2014-08-29 2016-02-24 张向伟 Non-steel-wire lining extruding anchor head

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001152609A (en) * 1999-11-30 2001-06-05 Anderson Technology Kk Pc-steel stranded wire connecting structure
JP2002227343A (en) * 2001-02-02 2002-08-14 Ps Corp Engaging device of prestressing bar, connecting device and anchoring deice therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001152609A (en) * 1999-11-30 2001-06-05 Anderson Technology Kk Pc-steel stranded wire connecting structure
JP2002227343A (en) * 2001-02-02 2002-08-14 Ps Corp Engaging device of prestressing bar, connecting device and anchoring deice therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105350722A (en) * 2014-08-29 2016-02-24 张向伟 Non-steel-wire lining extruding anchor head

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