JP3380904B2 - Method and apparatus for measuring fixing load of PC steel - Google Patents
Method and apparatus for measuring fixing load of PC steelInfo
- Publication number
- JP3380904B2 JP3380904B2 JP21367094A JP21367094A JP3380904B2 JP 3380904 B2 JP3380904 B2 JP 3380904B2 JP 21367094 A JP21367094 A JP 21367094A JP 21367094 A JP21367094 A JP 21367094A JP 3380904 B2 JP3380904 B2 JP 3380904B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- measuring
- pulling
- steel material
- fixing
- 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.)
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- Force Measurement Appropriate To Specific Purposes (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、プレストレストコン
クリート構造物の施工時におけるPC鋼材の定着荷重の
測定方法と、その測定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 method for measuring a fixing load of a PC steel material during construction of a prestressed concrete structure, and a measuring apparatus therefor.
【0002】[0002]
【従来の技術】プレストレストコンクリート構造物(P
C構造物)の施工に際しては、公知のとおりコンクリー
トの打設前あるいは打設後に、プレストレス力を導入す
るため、PC鋼材(PC鋼線、PCより線、PC鋼棒)
に緊張力を掛ける。例えば、ポストテンション方式と呼
ばれる、つまりコンクリート打設後にプレストレス力を
導入する場合は、PC鋼材に所望の緊張力を掛ける。そ
して、その端部は、それぞれくさび式、ねじ式あるいは
フィッチング式その他の方式による定着具(定着体)と
呼ばれるものを用いて支圧板に定着させるものである。2. Description of the Related Art Prestressed concrete structures (P
In the construction of (C structure), PC steel material (PC steel wire, PC stranded wire, PC steel bar) is used to introduce a prestressing force before or after concrete is placed, as is well known.
Apply tension to. For example, in the case of a post tension method, that is, when a prestressing force is introduced after pouring concrete, a desired tension force is applied to the PC steel material. Then, the end portions thereof are fixed to the pressure bearing plate by using a so-called fixing device (fixing member) of wedge type, screw type or fitting type.
【0003】ところで、このPC鋼材端部の定着に際し
て、PC鋼材の定着緊張力、つまり定着具(定着体)の
定着荷重を確認することは、PC構造物の施工上きわめ
て重要なことである。従来、この定着荷重を確認する、
いわゆる定着荷重の測定方法としては、次のような要領
で実施してきた。By the way, at the time of fixing the end portion of the PC steel material, it is extremely important for the construction of the PC structure to confirm the fixing tension of the PC steel material, that is, the fixing load of the fixing tool (fixing member). Conventionally, confirm this fixing load,
A so-called fixing load measuring method has been carried out in the following manner.
【0004】(1)PC鋼材に緊張力を掛けるためのジ
ャッキ、一般には、圧力計を備えた油圧式のセンターホ
ール式ジャッキをPC鋼材の端部に取り付け、このジャ
ッキを作動してPC鋼材に緊張力を掛ける。その際、P
C鋼材の端部には、定着具(定着体)を取り付けるとと
もに、これを受止する支圧板を設けてある。
(2)そこで、この定着具(定着体)と支圧板との間に
隙間が形成されるまでPC鋼材に余分の緊張力を掛け
る。具体的には0.3mm程度の薄板鋼板で形成した測
定板を差し込むことができる程度に緊張力を掛ける。
(3)隙間が形成されたところで、この隙間に異なる方
向からそれぞれ前記測定板を差し込み、前記ジャッキの
負荷を零にする。つまり無負荷に解放する。すると隙間
に差し込んだ前記測定板は、PC鋼材の緊張力により定
着具(定着体)と支圧板との間に挟着されることにな
る。
(4)測定板の挟着が終了すると、前記無負荷にしたジ
ャッキを再作動してPC鋼材に徐々に緊張力を掛ける。
すると、前記測定板を挟着した定着具(定着体)と支圧
板との挟着力が弱められることになる。そこで試験者が
それぞれ測定板の端部を手指で把持し、測定板を引っ張
った状態でジャッキを再作動し、PC鋼材に対する緊張
力を徐々に高めて行けば、ある一定値のところで測定板
を挟着部より引き抜くことができるようになる。そこ
で、この引き抜いた瞬間、つまり測定板を挟着部から引
き抜いた瞬間のジャッキに装備された圧力計の数値を読
み取り、この数値から定着荷重を求め確認していた。な
お、前記読み取り値は誤差が生じるため、複数回測定
し、その平均値から定着荷重を求め、連続3回の測定値
の平均値をもって、当該テンドン、すなわちPC鋼材の
定着緊張力としていた。(1) A jack for applying tension to a PC steel material, generally, a hydraulic center-hole type jack equipped with a pressure gauge is attached to the end of the PC steel material, and the jack is operated to make the PC steel material. Apply tension. At that time, P
A fixing tool (fixing body) is attached to the end of the C steel material, and a pressure plate for receiving the fixing tool is provided. (2) Then, an extra tension is applied to the PC steel material until a gap is formed between the fixing tool (fixing body) and the pressure bearing plate. Specifically, the tension is applied to the extent that a measurement plate formed of a thin steel plate of about 0.3 mm can be inserted. (3) When a gap is formed, the measurement plates are inserted into the gap from different directions to reduce the load on the jack to zero. In other words, it releases without load. Then, the measurement plate inserted into the gap is sandwiched between the fixing tool (fixing body) and the pressure support plate by the tension of the PC steel material. (4) When the sandwiching of the measurement plate is completed, the unloaded jack is reactivated to gradually apply tension to the PC steel material.
Then, the sandwiching force between the fixing plate (fixing body) sandwiching the measurement plate and the pressure support plate is weakened. Therefore, if the tester grasps each end of the measuring plate with his / her fingers and re-operates the jack while pulling the measuring plate and gradually increases the tension to the PC steel material, the measuring plate is fixed at a certain value. It will be possible to pull it out from the sandwiching part. Therefore, at the moment of pulling out, that is, at the moment of pulling out the measurement plate from the sandwiching portion, the value of the pressure gauge attached to the jack was read, and the fixing load was obtained and confirmed from this value. Since the read value has an error, it was measured a plurality of times, the fixing load was calculated from the average value, and the average value of the three consecutive measured values was used as the fixing tension of the tendon, that is, the PC steel material.
【0005】ちなみに、図3(A)は、前記(3)の過
程を示すもので、PC鋼材20に、ジャッキ30を介し
て緊張力を掛け、PC鋼材20側の定着具(定着体)4
0と、固定側である支圧板50との間に薄板鋼板からな
る測定板60を挟着させた状態を示す要部の側面図であ
る。30aは、ジャッキ30のヘッドに設けたジャッキ
チェヤーリングである。なお、図3(A)(B)には表
示していないが、ジャッキ30には圧力計が装備されて
いる。また、図3(B)は、前記定着具(定着体)40
と支圧板50との間にシム70を介在させ、このシム7
0と定着具(定着体)40との間に測定板60を挟着さ
せて測定する場合を示す要部の側面図である。Incidentally, FIG. 3 (A) shows the step (3), in which a tension force is applied to the PC steel material 20 via the jack 30 to fix the PC steel material 20 (fixing member) 4.
FIG. 3 is a side view of a main part showing a state in which a measurement plate 60 made of a thin steel plate is sandwiched between 0 and a bearing plate 50 on the fixed side. Reference numeral 30 a is a jack chain ring provided on the head of the jack 30. Although not shown in FIGS. 3A and 3B, the jack 30 is equipped with a pressure gauge. Further, FIG. 3B shows the fixing tool (fixing body) 40.
A shim 70 is interposed between the pressure bearing plate 50 and the bearing plate 50, and the shim 7
FIG. 3 is a side view of an essential part showing a case where a measurement plate 60 is sandwiched between 0 and a fixing tool (fixing body) 40 for measurement.
【0006】[0006]
【発明が解決しようとする課題】従来のPC構造物施工
におけるPC鋼材の定着荷重は、前記説明したような要
領で確認、測定していた。そのため、次のような問題点
が指摘されていた。
(1)測定板の挟着部からの引き抜きを測定者の手作業
に依存している。引き抜きは測定者の腕力に支配され個
人差があり、結果にバラツキをもたらす。
(2)測定板を挟着部から引き抜く試験者と、その引き
抜き瞬間時におけるジャッキ圧力計の数値を読み取る作
業者とが別人となり、しかも測定板を引き抜いた試験者
の合図に基づいて計器の数値を読み取っている。そのた
め、そこにタイムラグがあり、読み取り値の精度にもバ
ラツキが発生しやすく、結果の信頼性に難点がある。
(3)測定場所が施工現場で、環境的にきわめて騒々し
く、前記(1)および(2)の理由とあいまって、精度
の高い定着荷重の測定手段としては問題があり、また測
定作業に多くの要員を必要とする欠点があった。The fixing load of the PC steel material in the conventional PC structure construction has been confirmed and measured in the manner as described above. Therefore, the following problems have been pointed out. (1) Pulling out the measurement plate from the clamped portion depends on the manual work of the measurer. The pulling out is subject to the physical strength of the measurer and varies depending on the individual, resulting in variations in the result. (2) The tester who pulls out the measurement plate from the clamping part and the operator who reads the value of the jack pressure gauge at the moment of pulling out are different persons, and the value of the instrument is based on the signal of the tester who pulled out the measurement plate. Is reading. Therefore, there is a time lag there, and variations in the accuracy of the read value are likely to occur, and the reliability of the result is difficult. (3) The place of measurement is a construction site, which is extremely noisy environmentally, and there is a problem as a highly accurate fixing load measuring means in combination with the reasons (1) and (2) above. It had the drawback of requiring a lot of personnel.
【0007】この発明は、このような従来の測定方法の
問題点や欠点を解消し、精度と信頼性の高い、しかも測
定作業に多くの要員を必要としない定着荷重の測定方法
およびその測定装置を提供することを目的として発明し
たものである。The present invention solves the above problems and drawbacks of the conventional measuring method, has a high accuracy and reliability, and a fixing load measuring method and a measuring apparatus therefor which do not require a large number of personnel for the measuring work. The invention was made for the purpose of providing
【0008】[0008]
【課題を解決するための手段】そこで、この発明は前記
目的を達成する手段として、PC鋼材にジャッキを介し
て緊張力を掛け、PC鋼材側の定着具(定着体)と、支
圧板との間に隙間を形成し、この隙間に薄板鋼板からな
る測定板を差し込むとともに、前記ジャッキを無負荷に
して前記測定板を定着具(定着体)との間に挟着させ、
ついで前記ジャッキを再作動して徐々にPC鋼材に対す
る緊張力を強め、前記挟着させた測定板を挟着部より引
き抜き、この引き抜き瞬間時のジャッキ荷重に基づい
て、PC鋼材の定着荷重を測定する方法として、まず、
次のように構成した。Therefore, as means for achieving the above object, the present invention applies a tension force to a PC steel material through a jack so that a fixing tool (fixing body) on the PC steel material side and a pressure plate are provided. A gap is formed between them, and a measurement plate made of a thin steel plate is inserted into this gap, and the jack is unloaded and the measurement plate is sandwiched between a fixing tool (fixing body),
Then, the jack is re-activated to gradually increase the tension on the PC steel material, the clamped measurement plate is pulled out from the clamped portion, and the fixing load of the PC steel material is measured based on the jack load at the moment of pulling out. As a way to do, first,
I configured it as follows:
【0009】PC鋼材の定着具(定着体)と支圧板との
間に挟着させた測定板の端部を一定の引き抜き力を蓄勢
した測定板の引き抜き手段に把持させるようにした。そ
して、この引き抜き手段による測定板の引き抜き作動信
号に基づいて、PC鋼材の定着荷重を表示手段を介して
リアルタイムに確認できるようにした。The end portion of the measuring plate sandwiched between the fixing member (fixing body) made of PC steel and the pressure bearing plate is held by the pulling-out means of the measuring plate which stores a constant pulling force. Then, the fixing load of the PC steel material can be confirmed in real time through the display means based on the pulling-out operation signal of the measuring plate by the pulling-out means.
【0010】ついで、前記測定方法を実施する装置とし
ては、次のように構成した。まず、測定板の端部を把持
する把持手段と、測定板の引き抜き力を蓄勢する蓄勢手
段とからなる測定板の引き抜き装置を構成した。Next, an apparatus for carrying out the above-mentioned measuring method was constructed as follows. First, a pulling-out device for a measuring plate is configured by a holding means for holding the end portion of the measuring plate and a storing means for storing the pulling-out force of the measuring plate.
【0011】そして、この引き抜き装置に、測定板の引
き抜き作動時に引き抜き作動信号を発信する発信手段を
組み付けた。さらに、この発信手段による作動信号に基
づいてPC鋼材の定着荷重を表示する表示手段を引き抜
き装置に接続し、この引き抜き装置と、引き抜き装置の
作動信号を発信する発信手段と、定着荷重を表示する3
つの主要な構成部材からなるPC鋼材の定着荷重測定装
置とした。Then, a transmitting means for transmitting a pulling-out operation signal when pulling out the measuring plate is attached to the pulling-out device. Further, display means for displaying the fixing load of the PC steel material based on the operation signal from the transmitting means is connected to the pulling device, and the pulling device, the transmitting means for transmitting the operating signal of the pulling device, and the fixing load are displayed. Three
It was a fixing load measuring device for PC steel consisting of two main components.
【0012】なお、前記測定板の端部を把持する把持手
段は、ボルトナットからなるクランプ手段をもって構成
した。測定板の引き抜き力を蓄勢する蓄勢手段は、フレ
ーム部材と、案内杆と、作動杆と、ばね部材とを組み合
わせて次のように構成した。The grasping means for grasping the end portion of the measuring plate is constituted by a clamp means composed of a bolt and nut. The energy accumulating means for accumulating the pulling force of the measuring plate is configured as follows by combining the frame member, the guide rod, the operating rod, and the spring member.
【0013】まず、フレーム部材は、門型フレームに構
成した。案内杆は、棒状体をもって構成し、先端部を前
記フレーム部材の天端部に設けた挿入孔より挿入し、基
端部には抜け落ち防止の制止ナットを螺合させた構成と
した。First, the frame member was constructed as a portal frame. The guide rod has a rod-like body, a tip end portion is inserted through an insertion hole provided in the top end portion of the frame member, and a stopper nut for preventing slip-off is screwed into the base end portion.
【0014】作動杆は、細長い帯状の板材をもって構成
し、その基端部をL字状に折曲して受支部を形成すると
ともに、この受支部に設けた誘導孔を介して前記案内杆
の先端部側から軸線方向に移動自在に挿貫し、案内杆に
保持させた構成とした。The operating rod is composed of an elongated strip-shaped plate material, and the base end portion thereof is bent into an L-shape to form a support portion, and the guide rod of the guide rod is provided through a guide hole provided in the support portion. The guide rod was inserted so as to be movable in the axial direction from the tip end side and held by the guide rod.
【0015】次に、ばね部材は、巻ばねを用い、前記案
内杆に先端部側から外装し、案内杆の先端部には受止板
を取り付け、この受止板と前記作動杆の基端部のL字状
の受支部との間に介装させた。Next, as the spring member, a coil spring is used, and the guide rod is covered from the tip end side, and a receiving plate is attached to the tip end of the guide rod. The receiving plate and the base end of the operating rod are attached. It was interposed between the L-shaped receiving and supporting part of the part.
【0016】さらに前記測定板の端部を把持するクラン
プは、前記測定板の引き抜き力を蓄勢する蓄勢手段にお
ける作動杆の先端部に取り付けた構成とした。Further, the clamp for gripping the end portion of the measuring plate is attached to the tip end portion of the operating rod in the energy storing means for storing the pulling force of the measuring plate.
【0017】次に、前記引き抜き装置による測定板の引
き抜き作動信号を発信する発信手段は、引き抜き装置に
おける前記作動杆の軸線方向の移動にともなってON−
OFF作動するスイッチをもって構成した。Next, the transmitting means for transmitting the signal for actuating the withdrawal of the measuring plate by the withdrawal device is turned on with the movement of the operating rod in the withdrawal device in the axial direction.
It is configured with a switch that is turned off.
【0018】作動信号に基づいてPC鋼材の定着荷重を
表示する表示手段は、PC鋼材に緊張力を掛けるジャッ
キの圧力計を前記スイッチを介して数値表示と点滅形式
の表示灯を有する表示装置に接続した構成としたことを
特徴とするものである。The display means for displaying the fixing load of the PC steel material based on the operation signal is a jack pressure gauge for applying a tension force to the PC steel material to a display device having a numerical display and a blinking type indicator light via the switch. It is characterized in that it is configured to be connected.
【0019】[0019]
【作用】この発明によるPC鋼材の定着荷重の測定方法
およびその測定装置は、以上説明したように構成したの
で、あらかじめ定着具(定着体)と支圧板との間に測定
板を挟着させておく。そして、この測定板の端部を前記
引き抜き装置における作動杆の先端部に取り付けたボル
トナットからなる把持部にクランプさせる。その際、作
動杆は、案内杆に外装したばね部材に抗して軸線方向に
引き出す。その結果、案内杆の先端部と作動杆の基端部
との間に介装されたばね部材が圧縮され、作動杆自体に
は、その作動杆を基端部方向へ復元させようとする力が
蓄勢されることになる。つまり作動杆を介して測定板を
挟着部から引き抜こうとする一定の引き抜き力が蓄勢さ
れることになる。The measuring method and apparatus for measuring the fixing load of the PC steel material according to the present invention is constructed as described above. Therefore, the measuring plate should be sandwiched in advance between the fixing tool (fixing body) and the pressure bearing plate. deep. Then, the end portion of the measuring plate is clamped by the grip portion formed of a bolt and nut attached to the tip end portion of the operating rod in the pulling device. At that time, the operating rod is pulled out in the axial direction against the spring member mounted on the guide rod. As a result, the spring member interposed between the tip end portion of the guide rod and the base end portion of the operating rod is compressed, and the actuating rod itself has a force to restore the actuating rod toward the base end portion. Will be stored up. That is, a constant pulling force for pulling the measuring plate out of the sandwiched portion is stored through the operating rod.
【0020】そこで、ジャッキを作動して徐々にPC鋼
材に緊張力を掛けると、前記定着具(定着体)と支圧板
とによって形成される挟着部の挟着力が弱められる。そ
して挟着力が前記引き抜き装置における作動杆に蓄勢さ
れた引き抜き力より以下になれば、測定板は挟着部より
自動的に引き抜かれることになる。つまり、作動杆は元
の位置に復元される。Therefore, when the jack is operated to gradually apply tension to the PC steel material, the clamping force of the clamping portion formed by the fixing tool (fixing body) and the pressure support plate is weakened. When the clamping force becomes less than the withdrawal force stored in the operating rod of the extracting device, the measuring plate is automatically withdrawn from the clamping part. That is, the operating rod is restored to its original position.
【0021】作動杆には、その作動時に作動信号を発信
する発信手段、つまりON−OFF作動するスイッチが
組み付けてあるため、このスイッチがON作動すること
になる。スイッチは、PC鋼材に緊張力を掛けるジャッ
キの圧力計を介した数値表示と点滅形式の表示灯を有す
る表示装置に接続されているため、このスイッチがON
作動すれば、瞬間的にその時点におけるPC鋼材の定着
荷重を表示することになる。Since the operating rod is equipped with a transmitting means for transmitting an operating signal at the time of its operation, that is, a switch for ON-OFF operation, this switch is turned ON. The switch is ON because it is connected to a display device that has a numerical display and a blinking type indicator light via a pressure gauge of a jack that applies tension to the PC steel material.
If it operates, the fixing load of the PC steel material at that moment will be displayed instantaneously.
【0022】[0022]
【実施例】さらに、この発明を図面に示す実施例に基づ
いて具体的に説明する。なお、以下の説明においては、
従来の測定方法手段の説明に用いた、つまり図3(A)
および(B)に付した部品番号と共通する部品について
は、同一符号を用いて説明する。まず、図1は、定着具
(定着体)40と支圧板50との間に測定板60を挟着
させた状態を示す要部の側面図である。すなわち挟着さ
せた測定板60の端部を挟着部から引き抜こうとする力
を蓄勢した状態で引き抜き装置に測定板60の端部を把
持させた状態を示す要部の側面図である。また、図2
は、測定板60を引き抜いた状態を示す要部の側面図で
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the drawings. In the following explanation,
It was used to explain the conventional measuring method, that is, FIG.
Parts that are common to the part numbers given in (B) and (B) will be described using the same reference numerals. First, FIG. 1 is a side view of an essential part showing a state in which a measuring plate 60 is sandwiched between a fixing tool (fixing body) 40 and a pressure support plate 50. That is, it is a side view of the main part showing a state in which the pulling-out device holds the end portion of the measurement plate 60 in a state in which a force for pulling out the end portion of the held measurement plate 60 from the holding portion is stored. Also, FIG.
[Fig. 4] is a side view of a main part showing a state where the measurement plate 60 is pulled out.
【0023】引き抜き装置は、先に説明したように、測
定板60の端部を把持するボルトナットからなるクラン
プ1と、フレーム部材2と、案内杆3と、作動杆4と、
ばね部材5とをもって構成した。フレーム部材2は、図
示のように門型フレーム部材をもって構成し、左側の脚
端部側をジャッキ30側と支圧板50との間に取り付け
るようにした。図示では水平方向に取り付けるようにし
た。そして右側の天端部2aには後述する案内杆3の挿
入孔2bを穿設した。案内杆3は、基端部3bに抜け落
ち防止の制止ナット3cを螺合させ、前記フレーム部材
2の挿入孔2bより先端部3a(図示で左側)を挿入
し、門型フレーム部材2内に保持させるようにして組み
付けた。As described above, the pulling-out device includes a clamp 1 composed of a bolt and a nut for gripping the end of the measuring plate 60, a frame member 2, a guide rod 3, an operating rod 4, and the like.
It is configured with the spring member 5. The frame member 2 is constituted by a gate-shaped frame member as shown in the drawing, and the left leg end side is attached between the jack 30 side and the pressure support plate 50. In the figure, it is attached horizontally. Then, an insertion hole 2b for a guide rod 3 described later is formed in the right end 2a. The guide rod 3 is retained in the gate-shaped frame member 2 by screwing a stopper nut 3c that prevents the guide rod 3 from slipping off, and inserting the tip portion 3a (left side in the drawing) from the insertion hole 2b of the frame member 2. Assembled so that
【0024】作動杆4は、細長い帯板状からなる杆材を
もって構成し、その基端部(図示で右側)をL字状に折
曲して受支部4aを形成し、この受支部4aには誘導孔
4bを設けた。そして、この誘導孔4bに前記案内杆3
の先端部3a側を挿入し、作動杆4自体を軸線方向、つ
まり水平方向に移動自在に挿貫させた。すなわち、案内
杆3を介して門型フレーム部材2内に作動杆4を収納さ
せた形にした。The operating rod 4 is composed of a rod-shaped rod member having an elongated strip shape, and its base end portion (right side in the drawing) is bent into an L-shape to form a support portion 4a. Has a guide hole 4b. Then, the guide rod 3 is inserted into the guide hole 4b.
The distal end portion 3a side was inserted, and the operating rod 4 itself was movably inserted in the axial direction, that is, the horizontal direction. That is, the operating rod 4 is housed in the gate-shaped frame member 2 via the guide rod 3.
【0025】ついで、ばね部材5は、図示のように巻ば
ねを用い、これを前記案内杆3の先端部3a、図示では
左側から外装するとともに、案内杆3の先端部3aに受
止板3dを取り付け、この受止板3dと前記作動杆4に
おける受支部4aとの間に介装させた。そして前記ボル
トナットからなるクランプ1は、この作動杆4の先端部
4c、図示においては、作動杆4の左側端部に取り付け
た。Next, as the spring member 5, a coil spring is used as shown in the drawing. The coil spring is mounted on the tip 3a of the guide rod 3 from the left side in the figure, and the receiving plate 3d is attached to the tip 3a of the guide rod 3. Was attached and was interposed between the receiving plate 3d and the receiving and supporting portion 4a of the operating rod 4. The clamp 1 composed of the bolt and nut is attached to the tip 4c of the operating rod 4, that is, the left end of the operating rod 4 in the figure.
【0026】すなわち、作動杆4の先端部4c(図示で
は左側端部)に取り付けたクランプ1側を案内杆3に沿
って左側に引き出せば、前記ばね部材5が圧縮され、作
動杆4自体に常に一定の復元力が蓄勢されるように構成
した。つまり、測定板60を挟着部から右側方向に引き
抜こうとする力が自動的に蓄勢されるように構成した。That is, when the side of the clamp 1 attached to the tip 4c (left end in the figure) of the operating rod 4 is pulled out to the left along the guide rod 3, the spring member 5 is compressed and the operating rod 4 itself. It is configured so that a constant restoring force is accumulated. That is, the force for pulling out the measurement plate 60 from the sandwiching portion in the right direction is automatically stored.
【0027】次にPC鋼材20にジャッキ30を再作動
して徐々に緊張力を掛け、前記引き抜き装置に蓄勢した
引き抜き力を利用して測定板60を挟着部から引き抜い
た瞬間の作動信号を発信するスイッチ6は、図1で概念
的に示すように、引き抜き装置を構成する作動杆4の後
端部附近(図示で右側)に設置した。具体的には、作動
杆4が前後水平方向に作動したときON−OFF作動す
るリミットスイッチ形式のスイッチ6を作動杆4に関連
させて設置した。Next, the jack 30 is re-activated on the PC steel material 20 to gradually apply a tension force, and the operation signal at the moment when the measuring plate 60 is pulled out from the sandwiching portion by utilizing the pulling force accumulated in the pulling device. As conceptually shown in FIG. 1, the switch 6 for transmitting the signal is installed near the rear end (right side in the drawing) of the operating rod 4 which constitutes the pulling device. Specifically, a limit switch type switch 6 that is turned on and off when the operating rod 4 is operated in the front-rear horizontal direction is installed in association with the operating rod 4.
【0028】図2は測定板60を引き抜き、その結果、
作動杆4の受支部4aがフレーム部材2の天端部2aま
で右方向に移動し、その移動作動によってON作動した
状態を示す。FIG. 2 shows that the measurement plate 60 is pulled out, and as a result,
The state where the receiving and supporting portion 4a of the operating rod 4 has moved rightward to the top end portion 2a of the frame member 2 and has been turned on by the moving operation is shown.
【0029】前記引き抜き装置の作動信号に基づいて、
PC鋼材20の定着荷重を表示する表示手段、つまり表
示装置7は、図1および図2で示すようにデジタル形式
の数値表示手段を内蔵したディスプレー8と点滅式の表
示灯9を有する表示装置7をもって構成した。そして、
この表示装置7に前記ジャッキ30の圧力計10を前記
スイッチ6を介して接続させた。なお、図2は、先に説
明したように測定板60を挟着部から引き抜き、その引
き抜き瞬間時のPC鋼材20の定着荷重を前記表示装置
7に表示した状態を示すものである。また図1および図
2において、11は引き抜き装置を測定位置にセットす
るため、フレーム部材2の左側端部に取り付けた台座で
ある。Based on the operation signal of the drawing device,
The display means for displaying the fixing load of the PC steel material 20, that is, the display device 7, is a display device 7 having a display 8 and a blinking type indicator lamp 9 in which digital numerical value display means is incorporated as shown in FIGS. Configured with. And
The pressure gauge 10 of the jack 30 was connected to the display device 7 via the switch 6. Note that FIG. 2 shows a state in which the measuring plate 60 is pulled out from the sandwiched portion and the fixing load of the PC steel material 20 at the moment of pulling out is displayed on the display device 7 as described above. In FIGS. 1 and 2, reference numeral 11 is a pedestal attached to the left end of the frame member 2 for setting the extraction device at the measurement position.
【0030】[0030]
【発明の効果】この発明は、以上実施例を通して説明し
たように構成したので、従来の測定方法ないし装置に比
較し、次のような効果が発揮される。
(1)測定値が測定者によって異なるようなことがな
い。つまり蓄勢された一定の引き抜き力によって測定板
を引き抜くので、測定値にバラツキが無く、高い精度の
定着荷重を確認することができる。
(2)測定板の引き抜き作動を発信手段を介して瞬間的
に捕捉し、かつ、その捕捉時のジャッキ圧力に基づいて
PC鋼材の定着荷重をデジタル表示と点滅式の表示灯等
を有する表示装置を介して測定者に告知させるようにな
っているため、前記(1)の作用効果とあいまって、バ
ラツキのない、正確な定着荷重の確認ができる。
(3)測定作業における人手依存部分は、測定板を所定
隙間に差し込み挟着させる部分と、挟着させた測定板の
端部を引き抜き装置にクランプさせる部分だけである。
したがって、きわめて簡単な作業によって測定作業を行
うことができ、従来のように多くの人手を必要としな
い。
(4)特に、従来のように瞬間的に作動する圧力計を作
業者が読み取り、この読み取り値に基づいて結果を得る
という方法ではないので、読み取り誤差の発生もなく、
前記(3)の効果とあいまって測定作業の安定性と迅速
性、正確性が著しく向上される。Since the present invention is configured as described above through the embodiments, the following effects are exhibited as compared with the conventional measuring method or apparatus. (1) The measured value does not vary from person to person. That is, since the measurement plate is pulled out by the stored constant pulling force, there is no variation in the measured value, and the fixing load can be confirmed with high accuracy. (2) A display device that instantaneously captures the pulling-out operation of the measuring plate via the transmitting means, and has a digital display of the fixing load of the PC steel material based on the jack pressure at the time of capture and a blinking type indicator light. Since the measurer is notified via the above, it is possible to confirm the fixing load accurately without any variation together with the action and effect of (1). (3) The human-dependent part in the measurement work is only the part where the measuring plate is inserted into the predetermined gap and clamped, and the end of the clamped measuring plate is clamped by the pulling device.
Therefore, the measurement work can be performed by an extremely simple work and does not require a lot of manpower as in the past. (4) In particular, since it is not a method in which an operator reads a pressure gauge that operates instantaneously and obtains a result based on the read value as in the conventional case, no reading error occurs,
Combined with the effect of (3), the stability, speediness and accuracy of the measurement work are significantly improved.
【図1】この発明による測定方法を実施する装置の要部
を示す側面図で、測定板を定着具(定着体)と支圧板と
の間に挟着させるとともに、その測定板の端部を引き抜
き装置を構成するクランプに把持させた状態を示す。FIG. 1 is a side view showing a main part of an apparatus for carrying out a measuring method according to the present invention, in which a measuring plate is sandwiched between a fixing tool (fixing body) and a pressure bearing plate, and an end portion of the measuring plate is The state which was made to grasp by the clamp which comprises a pull-out apparatus is shown.
【図2】測定板を挟着部から引き抜いた状態を示す装置
の要部を示す側面図である。FIG. 2 is a side view showing a main part of the apparatus showing a state where the measurement plate is pulled out from the sandwiching part.
【図3】従来の測定方法を説明するための装置の要部を
示すもので、(A)は測定板を定着具(定着体)と支圧
板との間に挟着させた要部の側面図で、(B)は支圧板
と定着具(定着体)との間にシムを介在させて測定板を
挟着させた要部の側面図である。FIG. 3 shows a main part of an apparatus for explaining a conventional measuring method, and (A) is a side view of a main part in which a measurement plate is sandwiched between a fixing tool (fixing body) and a pressure plate. In the figure, (B) is a side view of a main part in which a measurement plate is sandwiched with a shim interposed between a pressure bearing plate and a fixing tool (fixing body).
20……PC鋼材(PC線、PCより線、PC鋼棒) 30……ジャッキ 30a……ジャッキチェヤーリング 40……定着具(定着体) 50……支圧板 60……測定板 70……シム 1……クランプ(ボルトナット式) 2……フレーム部材(門型フレーム) 2a……天端部 2b……挿入孔 3……案内杆 3a……先端部 3b……基端部 3c……制止ナット 3d……受止板 4……作動杆 4a……受支部 4b……誘導孔 4c……先端部 5……ばね部材(巻ばね) 6……スイッチ(作動信号発信手段) 7……表示装置 8……デジタル表示のディスプレー 9……点滅式の表示灯 10…圧力計(ジャッキ30) 11……台座 20 ... PC steel (PC wire, PC stranded wire, PC steel rod) 30 ... Jack 30a ... jack chainring 40: Fixing tool (fixing body) 50 ... Bearing plate 60 ... Measuring plate 70 ... Sim 1 ... Clamp (bolt nut type) 2 ... Frame member (gate frame) 2a ... the top end 2b ... Insertion hole 3 ... Guide rod 3a ... Tip 3b ... Base end 3c ... stop nut 3d ...... Retaining plate 4 ... Operating rod 4a ... Receiving branch 4b ... Guide hole 4c ... Tip 5: Spring member (roll spring) 6 ... Switch (operation signal transmission means) 7 ... Display device 8: Digital display 9: Flashing type indicator light 10 ... Pressure gauge (jack 30) 11 ... Pedestal
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−118231(JP,A) 特開 昭60−128320(JP,A) 特開 昭56−85019(JP,A) (58)調査した分野(Int.Cl.7,DB名) G01L 5/00 E04G 21/12 104 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-118231 (JP, A) JP 60-128320 (JP, A) JP 56-85019 (JP, A) (58) Field (Int.Cl. 7 , DB name) G01L 5/00 E04G 21/12 104
Claims (4)
け、PC鋼材側の定着具と、支圧板あるいはシムとの間
に隙間を形成し、この隙間に薄板鋼板からなる測定板を
差し込むとともに、前記ジャッキを無負荷にして前記測
定板を定着具と支圧板との間に挟着させ、ついで前記ジ
ャッキを再作動して徐々にPC鋼材に対する緊張力を強
めながら前記挟着させた測定板を挟着部より引き抜き、
この引き抜きの瞬間のジャッキ荷重に基づいてPC鋼材
の定着荷重を測定する方法であって、前記定着具と支圧
板との間に挟着させた測定板の端部を一定の引き抜き力
を蓄勢した測定板の引き抜き手段に把持させ、この引き
抜き手段による測定板の引き抜き作動信号に基づいて、
PC鋼材の定着荷重を表示手段を介して確認することを
特徴とするPC鋼材の定着荷重測定方法。1. A tension force is applied to a PC steel material through a jack to form a gap between a fixing tool on the PC steel material side and a pressure plate or a shim, and a measurement plate made of a thin steel plate is inserted into the gap. , The measurement plate is clamped between the fixing device and the pressure support plate with the jack unloaded, and the clamp is clamped while reactivating the jack to gradually increase the tension on the PC steel material. Pull out from the clamp part,
A method of measuring the fixing load of the PC steel material on the basis of the jack load at the moment of pulling out, in which a fixed pulling force is accumulated at the end of the measuring plate sandwiched between the fixing tool and the pressure support plate. Grasped by the drawn-out means for pulling out the measuring plate, and based on the pull-out operation signal of the measuring board by this drawn-out means,
A fixing load measuring method for PC steel, comprising confirming the fixing load of PC steel through a display means.
定板の引き抜き力を蓄勢する蓄勢手段とからなる測定板
の引き抜き装置と、この引き抜き装置による測定板の引
き抜き作動時における引き抜き作動信号の発信手段と、
この発信手段による作動信号に基づいて、PC鋼材の定
着荷重を表示する表示手段とからなることを特徴とする
PC鋼材の定着荷重測定装置。2. A measuring plate withdrawing device comprising a holding means for holding an end portion of the measuring plate and an energy storing means for accumulating withdrawing force of the measuring plate, and a pulling-out operation of the measuring plate by the withdrawing device. Withdrawal actuation signal transmission means,
A fixing load measuring device for a PC steel material, comprising: a display means for displaying the fixing load of the PC steel material based on the operation signal from the transmitting means.
ルトナットよりなるクランプからなり、測定板の引き抜
き力を蓄勢する蓄勢手段は、フレーム部材と、案内杆
と、作動杆と、ばね部材とからなり、 前記フレーム部材は、門型を呈し、 前記案内杆は、フレーム部材の天端部に設けた挿入孔よ
り先端部を挿入し、基端部側には抜け落ち防止の制止ナ
ットを螺合させたものであり、 前記作動杆は、基端部をL字状に折曲して受支部を形成
するとともに、この受支部に設けた誘導孔を介して前記
案内杆の先端部側から軸線方向に移動自在に挿貫し、案
内杆に保持させたものであり、 前記ばね部材は、巻ばねからなり、前記案内杆に先端部
側から外装させ、案内杆の先端部には受止板を取り付
け、この受止板と、前記作動杆における基端部のL字状
の受支部との間に介装させたものであり、 前記測定板の端部を把持するクランプは、前記作動杆の
先端部に取り付けた測定板の引き抜き装置であることを
特徴とする請求項2記載のPC鋼材の定着荷重測定装
置。3. The gripping means for gripping the end portion of the measuring plate is a clamp made of a bolt and nut, and the accumulating means for accumulating the pulling force of the measuring plate includes a frame member, a guide rod, and an operating rod. The frame member has a gate shape, and the guide rod has a distal end portion inserted through an insertion hole provided at a top end portion of the frame member, and a stopper for preventing the guide rod from slipping off at a base end portion side. The actuating rod is formed by bending a base end portion into an L-shape to form a receiving support portion, and a tip end of the guide rod is provided through a guide hole provided in the receiving support portion. It is movably inserted in the axial direction from the part side, and is held by a guide rod.The spring member is made of a coil spring, and the guide rod is externally fitted from the tip end side to the tip end of the guide rod. Attaches a catch plate, and this catch plate and L of the base end part in the said operating rod. Wherein the clamp for holding the end of the measuring plate is a device for pulling out the measuring plate attached to the tip of the operating rod. Item 2. A fixing load measuring device for PC steel according to Item 2.
動時の作動信号を発信する発信手段は、引き抜き装置に
おける前記作動杆の軸線方向の移動にともなってON−
OFF作動するスイッチからなり、作動信号に基づいて
PC鋼材の定着荷重を表示する表示手段は、PC鋼材に
緊張力を掛けるジャッキの圧力計を前記スイッチを介し
て接続した数値表示と点滅形式の表示灯からなる表示装
置であることを特徴とする請求項2項および3項記載の
PC鋼材の定着荷重測定装置。4. A transmitting means for transmitting an operation signal at the time of the pulling-out operation of the measuring plate by the pulling-out device is turned on along with the movement of the operating rod in the pulling-out device in the axial direction.
The display means for displaying the fixing load of the PC steel material on the basis of the operation signal is composed of a switch that is turned off, and a numerical value display and a blinking type display in which a pressure gauge of a jack for applying tension to the PC steel material is connected through the switch. The fixing load measuring device for PC steel according to claim 2 or 3, which is a display device including a lamp.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21367094A JP3380904B2 (en) | 1994-09-07 | 1994-09-07 | Method and apparatus for measuring fixing load of PC steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21367094A JP3380904B2 (en) | 1994-09-07 | 1994-09-07 | Method and apparatus for measuring fixing load of PC steel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0875576A JPH0875576A (en) | 1996-03-22 |
JP3380904B2 true JP3380904B2 (en) | 2003-02-24 |
Family
ID=16643026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21367094A Expired - Fee Related JP3380904B2 (en) | 1994-09-07 | 1994-09-07 | Method and apparatus for measuring fixing load of PC steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3380904B2 (en) |
-
1994
- 1994-09-07 JP JP21367094A patent/JP3380904B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0875576A (en) | 1996-03-22 |
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