JPS5922824Y2 - Fixing tool for PC steel materials - Google Patents
Fixing tool for PC steel materialsInfo
- Publication number
- JPS5922824Y2 JPS5922824Y2 JP6320079U JP6320079U JPS5922824Y2 JP S5922824 Y2 JPS5922824 Y2 JP S5922824Y2 JP 6320079 U JP6320079 U JP 6320079U JP 6320079 U JP6320079 U JP 6320079U JP S5922824 Y2 JPS5922824 Y2 JP S5922824Y2
- Authority
- JP
- Japan
- Prior art keywords
- fixing tool
- fixing
- steel material
- steel materials
- tip
- 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
Links
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【考案の詳細な説明】
この考案はPC鋼材の定着具の構造に関するものである
。[Detailed description of the invention] This invention relates to the structure of a fixing device for PC steel.
一般に強い引張り荷重を負荷して使用するPC鋼材の定
着は、第1図に示すようにPC鋼材1を把持する模型の
定着具2をコンクリート4に埋め込まれあるいは当てら
れたブレート5に当てた定着部材3のテーパ一孔に嵌め
込んで行うのが普通である。Generally, the fixing of PC steel materials that are used under a strong tensile load is carried out by applying a model fixing device 2 that grips the PC steel material 1 to a plate 5 that is embedded or applied to concrete 4, as shown in Fig. 1. This is usually done by fitting it into a tapered hole in the member 3.
定着具2の外側は定着部材3のテーパ一孔とはパ同しテ
ーパーとして定着具2の中心部のネジ状の爪を有する孔
を内側に締めつけてPC鋼材の把持を確実にする。The outer side of the fixing tool 2 is tapered in the same way as the tapered hole of the fixing member 3, and the hole having a threaded claw at the center of the fixing tool 2 is tightened inward to securely grip the PC steel material.
また第2図に示すように2つの割型の定着具を1対にし
て用いることが多い。Furthermore, as shown in FIG. 2, two split-shaped fixing devices are often used as a pair.
この場合ネジ状の爪が全長に亘って切られていると定着
具の先端のところのPC鋼材の断面の外周部に集中応力
が生じ、そこから破断が開始するので該PC鋼材の全抗
張力を充分利用することができない。In this case, if the screw-shaped nail is cut over the entire length, concentrated stress will occur at the outer periphery of the cross section of the PC steel material at the tip of the fixing tool, and fracture will start from there, so the total tensile strength of the PC steel material will be reduced. cannot be used fully.
そのため第2図に示すように定着具2の先端部のネジ山
を2〜3山先端になるほど低くなるように削り取って爪
の噛み込みを弱くして応力集中を避けることが行われて
いる。Therefore, as shown in FIG. 2, the screw threads at the tip of the fixing tool 2 are shaved off so that the threads become lower as the tips reach two or three threads to weaken the biting of the nails and avoid stress concentration.
しかし、この方法では定着具2のネジの有効長さが短く
なる。However, with this method, the effective length of the screw of the fixing device 2 is shortened.
また孔の内側のネジ山をテーパーに一部削る加工は厄介
である。Also, it is difficult to process a part of the thread inside the hole to make it taper.
本考案の定着具は外側のテーパーを2段とすることによ
って上記欠点を除き、ネジ状の爪の保合を全長に亘って
完全にしながら応力集中を避けることができるようにし
たものである。The fixing tool of the present invention eliminates the above-mentioned drawbacks by having two steps of outer taper, and makes it possible to completely secure the threaded pawl over its entire length while avoiding stress concentration.
この考案を図面にもとづいて説明すると第3図に示すよ
うに定着具の内側は全長に亘って完全なネジ状の爪をも
うけ外周の本体部Aは定着部材のテーパ一孔とはパ同じ
テーパーθ1の模型とし、先端部Bの先端より長さlの
部分をθ1よ))大きな角度あのテーパーとしたもので
゛ある。To explain this idea based on the drawings, as shown in Fig. 3, the inside of the fixing tool has a complete screw-like claw over the entire length, and the main body part A on the outer periphery has the same taper as the tapered hole of the fixing member. A model of θ1 is used, and a portion of length l from the tip of tip portion B is tapered at a large angle as θ1).
この場合PC鋼材の材質、直径などによるが4と島の角
度差は少くとも1°以上好ましくは5°程度であり、■
が1mm以下では短か過ぎて先端部での応力集中か避け
られず、1は少なくとも1mm、好ましくは4m/m程
度とするのが製造上、使用上適当であり本考案の効果が
発揮できる。In this case, although it depends on the material and diameter of the PC steel material, the angle difference between 4 and the island is at least 1° or more, preferably about 5°,
If it is less than 1 mm, it is too short and stress concentration at the tip is unavoidable, so 1 is at least 1 mm, preferably about 4 m/m, which is suitable for manufacturing and use, and the effects of the present invention can be exhibited.
この定着具を用いてPC鋼材を従来と同し方法で定着す
ると上部Aには楔作用による締つけ力が働くが、先端部
Bのあの角度の部分は締つけ力は働かず定着部材のテー
パ一孔との間に隙間を生じている。When this fixing tool is used to fix a PC steel material in the same way as before, a tightening force is applied to the upper part A due to the wedge action, but no tightening force is applied to that angled portion of the tip B, and the tapered part of the fixing member There is a gap between the two holes.
そのため定着具の先端部BにおけるPC鋼材の外側周辺
部の応力集中が避けられる。Therefore, stress concentration on the outer periphery of the PC steel material at the tip B of the fixing tool can be avoided.
またネジは、全長に亘って完全に噛み込んでいるのでネ
ジの有効長さ、すなわち把持力にロスが無くそのため定
着具の長さを短くすることが可能である。Further, since the screw is completely engaged over its entire length, there is no loss in the effective length of the screw, that is, in the gripping force, and therefore the length of the fixing tool can be shortened.
また定着具の製造に際しては外側のテーパー加工のみで
良〈従来の定着具より容易である。Furthermore, when manufacturing the fixing device, only the outside taper processing is required (it is easier than conventional fixing devices).
L記の説明より明らかなように本考案は、2つ割型の定
着具、成るいはPC鋼材用の定着具に限定されるもので
はなく、その他の同種定着具にも利用で゛きるもので゛
ある。As is clear from the explanation in Section L, the present invention is not limited to a two-piece type fixing device or a fixing device for PC steel materials, but can also be used for other similar types of fixing devices. It is.
また、PC鋼材側の外周にネジを切り定着具の中心孔と
ネジ係合したときにも同様に有効である。It is also similarly effective when a thread is cut on the outer periphery of the PC steel material and engaged with the center hole of the fixing tool.
この考案によるとPC鋼材中に応力集中が発生すること
なく、また係合部を有効に利用できるので従来の定着具
に比しより短く、且つ製造容易な定着具とすることがで
きる効果を有するもので゛ある。According to this invention, stress concentration does not occur in the PC steel material, and the engaging portion can be used effectively, so it has the effect of making the fixing device shorter and easier to manufacture than conventional fixing devices. It is something.
第1図は、PC鋼材をコンクリ−1−に定着層の定着部
の断面図、第2図は従来の2つ割型定着具の斜視図、第
3図は、本考案の定着具の正面図である。
1:PC鋼材、2:定着具、3:定着部材、4:コンク
リート、5ニブレート。Fig. 1 is a sectional view of the fixing part of the fixing layer of PC steel material on concrete 1-, Fig. 2 is a perspective view of a conventional two-piece fixing device, and Fig. 3 is a front view of the fixing device of the present invention. It is a diagram. 1: PC steel material, 2: Fixing tool, 3: Fixing member, 4: Concrete, 5 Nibrate.
Claims (1)
状の爪をもうけ、且つ円錐型の外形を有するPC鋼材用
定着具において、本体部Aのテーパーθ1より大きなテ
ーパーへの円錐部を先端部Bにもうけたことを特徴とす
るPC鋼材用定着具。 2 テーパーへの部分の長さが少なくとも1 mm以上
であることを特徴とする実用新案登録請求の範囲第1項
記載のPC鋼材用定着具。[Claims for Utility Model Registration] 1. In a fixing tool for PC steel that engages with the PC steel at the center and has a screw-like pawl extending over the entire length inside, and has a conical outer shape, A fixing tool for prestressing steel material characterized by having a large taper conical part at the tip B. 2. The fixing tool for prestressing steel material according to claim 1, wherein the length of the tapered portion is at least 1 mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6320079U JPS5922824Y2 (en) | 1979-05-11 | 1979-05-11 | Fixing tool for PC steel materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6320079U JPS5922824Y2 (en) | 1979-05-11 | 1979-05-11 | Fixing tool for PC steel materials |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55162626U JPS55162626U (en) | 1980-11-21 |
JPS5922824Y2 true JPS5922824Y2 (en) | 1984-07-07 |
Family
ID=29297235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6320079U Expired JPS5922824Y2 (en) | 1979-05-11 | 1979-05-11 | Fixing tool for PC steel materials |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5922824Y2 (en) |
-
1979
- 1979-05-11 JP JP6320079U patent/JPS5922824Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS55162626U (en) | 1980-11-21 |
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