JPH0415863Y2 - - Google Patents
Info
- Publication number
- JPH0415863Y2 JPH0415863Y2 JP1983132897U JP13289783U JPH0415863Y2 JP H0415863 Y2 JPH0415863 Y2 JP H0415863Y2 JP 1983132897 U JP1983132897 U JP 1983132897U JP 13289783 U JP13289783 U JP 13289783U JP H0415863 Y2 JPH0415863 Y2 JP H0415863Y2
- Authority
- JP
- Japan
- Prior art keywords
- wedge
- reinforcing bars
- coupler
- tightening
- insertion hole
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 46
- 238000003780 insertion Methods 0.000 claims description 16
- 230000037431 insertion Effects 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
【考案の詳細な説明】
この考案は、異形ねじふし鉄筋等のねじ付鉄筋
結合用の継手に関するものである。[Detailed Description of the Invention] This invention relates to a joint for connecting threaded reinforcing bars such as deformed threaded reinforcing bars.
進歩の著しい土木、建築関係では、特に鉄筋継
手部の信頼性、作業の簡素化、工期短縮および構
造物の安全性の向上等の開発が強く要望されてい
る。この要望に応えるべく、コンクリートと鉄筋
の密着度を増大させる目的で鉄筋に模様を入れた
もの、例えば異形ねじふし鉄筋が開発され、汎用
されている。 In the fields of civil engineering and construction, which are rapidly progressing, there is a strong demand for development that improves the reliability of reinforcing joints, simplifies work, shortens construction times, and improves the safety of structures. In order to meet this demand, reinforcing bars with patterns added to them, such as irregularly shaped threaded reinforcing bars, for the purpose of increasing the degree of adhesion between concrete and reinforcing bars, have been developed and are now in widespread use.
ところで、上記鉄筋は長さに限度があり、運搬
上からも制限を受けるので構造物に適合させるに
は現場において継ぎたす必要が生じる。 By the way, the above-mentioned reinforcing bars have a limit in length and are also limited in terms of transportation, so it is necessary to splice them at the site in order to fit them into the structure.
一般に、鉄筋の継手には、重ね継ぎ、溶接、ね
じ継ぎ等が存在するが、いずれの場合も作業性に
問題がある。また、異形ねじふし鉄筋の継手に
は、一対の鉄筋の端部にねじカプラーをねじ込
み、そのねじカプラーの両側方において鉄筋に予
めねじ込んだロツクナツトの締付けにより一対の
鉄筋を接続するロツクナツト締付継手が採用され
るが、このような継手の場合には、ロツクナツト
の回転抵抗力が大きいため、その回動に特殊な大
トルクの工具を必要とし、しかもカプラーと一方
のロツクナツトの締付を行つたのち、他方のロツ
クナツトの締付けを行なうとカプラーが逆回転し
てゆるみが発生するおそれがある。又両側方のロ
ツクナツトを同時に締付けるとその結合力が一定
せずまた鉄筋を中心としてロツクナツトを回動さ
せるため、隣接する鉄筋の間隔が狭い場合にはロ
ツクナツトの締付けが困難であること等の多くの
欠点がある。 In general, reinforcing steel joints include lap joints, welding, screw joints, etc., but all of these methods have problems in workability. In addition, for joints of irregularly shaped threaded reinforcing bars, a locking nut tightening joint is used, in which a threaded coupler is screwed into the ends of a pair of reinforcing bars, and a locking nut screwed into the reinforcing bars in advance is tightened on both sides of the threaded coupler to connect the pair of reinforcing bars. However, in the case of such a joint, the rotation resistance of the lock nut is large, so a special high-torque tool is required to rotate it, and furthermore, after the coupler and one lock nut are tightened, If the other lock nut is tightened, the coupler may rotate in the opposite direction and become loose. Also, if the lock nuts on both sides are tightened at the same time, the bonding force will not be constant, and since the lock nuts rotate around the reinforcing bars, there will be many problems such as difficulty in tightening the lock nuts when the spacing between adjacent reinforcing bars is narrow. There are drawbacks.
この考案は、上記異形ねじふし鉄筋等のねじ付
き鉄筋の接続用継手に係り、鉄筋同士を強固に、
かつ確実に、しかも容易に接続することができる
と共に、接続の信頼性の高い継手を提供すること
を目的としている。 This invention relates to a joint for connecting threaded reinforcing bars, such as the above-mentioned irregularly shaped threaded reinforcing bars, to strengthen the reinforcing bars together.
It is an object of the present invention to provide a joint that can be connected reliably and easily, and has high connection reliability.
上記目的を達成するために、この考案は、内面
にめねじを形成した筒形カプラーに軸芯に対して
交差する貫通したクサビ挿入孔を設け、このクサ
ビ挿入孔にクサビと、このクサビの少なくとも一
側方に配置される押し板とを挿入し、上記カプラ
ーを一対のねじ付き鉄筋の端部にねじ込んで上記
押し板に鉄筋の端面を衝合したのち、上記クサビ
の端部に設けたねじ軸部に締付ナツトをねじ込
み、その締付ナツトの締付けによりクサビを軸方
向に移動して上記押し板を横方向に移動せしめ、
その押し板で鉄筋を軸方向に移動してねじ付き鉄
筋のねじとカプラーのめねじとの接触摩擦力を増
大させるようにしたものである。 In order to achieve the above object, this invention provides a cylindrical coupler with a female thread formed on the inner surface, a penetrating wedge insertion hole that intersects with the axis, a wedge in the wedge insertion hole, and at least one of the wedges. A push plate placed on one side is inserted, and the coupler is screwed into the ends of the pair of threaded reinforcing bars to abut the end faces of the reinforcing bars against the push plate, and then a screw provided at the end of the wedge is inserted. A tightening nut is screwed into the shaft portion, and by tightening the tightening nut, the wedge is moved in the axial direction and the push plate is moved laterally,
The push plate moves the reinforcing bars in the axial direction to increase the contact friction force between the screws of the threaded reinforcing bars and the female threads of the coupler.
また、ねじ軸部の先端に設定トルクにより破断
するネツク部を介してチツプを設け、そのチツプ
の破断により締付ナツトの締付けが完了するよう
にして締付ナツトの締付力を常に一定となるよう
にしたのである。 In addition, a tip is provided at the tip of the screw shaft via a neck that breaks when a set torque is applied, and the tightening of the tightening nut is completed when the tip breaks, so that the tightening force of the tightening nut is always constant. That's what I did.
以下、この考案の実施例を添付図面に基づいて
説明する。 Hereinafter, embodiments of this invention will be described based on the accompanying drawings.
第１図ないし第３図に示すように、この考案に
係る継手は、一対のねじ付き鉄筋を連結するカプ
ラー１と、このカプラー１で連結される一対の鉄
筋の端面間に配置されるクサビ１０と、このクサ
ビ１０の両側方に配置される一対の押し板２０と
の組み合わせから成る。 As shown in FIGS. 1 to 3, the joint according to this invention includes a coupler 1 that connects a pair of threaded reinforcing bars, and a wedge 10 that is arranged between the end faces of the pair of reinforcing bars that are connected by the coupler 1. and a pair of push plates 20 arranged on both sides of this wedge 10.
上記カプラー１は筒形に形成され、その内面に
はめねじ２を設けてある。また、カプラー１には
軸芯に対して交差する貫通したクサビ挿入孔３を
形成してあり、そのクサビ挿入孔３は、カプラー
１の軸方向に延びる長孔になつている。このカプ
ラー１の外周の形状は任意であり、図示のような
六角形の他、円形や四角形にしたりすることがで
きる。 The coupler 1 is formed into a cylindrical shape, and a female thread 2 is provided on the inner surface thereof. Further, the coupler 1 is formed with a penetrating wedge insertion hole 3 that intersects with the axis, and the wedge insertion hole 3 is an elongated hole extending in the axial direction of the coupler 1. The shape of the outer periphery of the coupler 1 is arbitrary, and in addition to the hexagonal shape shown in the figure, it can be circular or square.
前記クサビ１０は、上記カプラー１のクサビ挿
入孔３に対して挿入可能になり、その両側が傾斜
面１１に形成されている。また、クサビ１０の端
部にはねじ軸部１２が設けられ、そのねじ軸部１
２の先端に小径のネツク部１５を介してチツプ１
６が形成されている。上記ネツク部１５は、チツ
プ１６に作用する回転トルクが設定トルクを越え
ると破断するようになつている。 The wedge 10 can be inserted into the wedge insertion hole 3 of the coupler 1, and both sides thereof are formed with inclined surfaces 11. Further, a screw shaft portion 12 is provided at the end of the wedge 10, and the screw shaft portion 12 is provided at the end of the wedge 10.
Chip 1 is connected to the tip of Chip 2 through a small diameter neck portion 15.
6 is formed. The neck portion 15 is designed to break when the rotational torque acting on the chip 16 exceeds a set torque.
上記ねじ部１２の外側にワツシヤ１３がはめ込
まれ、締付ナツト１４がねじ込まれている。 A washer 13 is fitted onto the outside of the threaded portion 12, and a tightening nut 14 is screwed into it.
さらに、一対の押し板２０は、上記クサビ挿入
孔３に対して挿入可能な幅寸法に規制されてい
る。この押し板２０はクサビ形に形成され、その
片面の傾斜面２１の勾配は、クサビ１０の傾斜面
１１と同勾配になつている。 Further, the width of the pair of push plates 20 is limited to a width that allows them to be inserted into the wedge insertion hole 3. This push plate 20 is formed into a wedge shape, and the slope of one side of the slope 21 is the same slope as the slope 11 of the wedge 10.
実施例で示す継手は上記の構造から成り、この
継手は、一対の鉄筋を接続する前において、カプ
ラー１のクサビ挿入孔３にクサビ１０と一対の押
し板２０とを挿入し、上記クサビ１０のねじ軸部
１２にワツシヤ１３を嵌め、締付ナツト１４をね
じ込んで予め組立てておいてもよく、あるいは一
対の鉄筋の端部にカプラー１をねじ込んでから、
そのクサビ挿入孔３にクサビ１０および一対の押
し板２０を挿入し、上記クサビ１０のねじ軸部１
２にワツシヤ１３を嵌め、締付ナツト１４をねじ
込むようにしてもよい。 The joint shown in the embodiment has the above structure, and this joint is made by inserting the wedge 10 and the pair of push plates 20 into the wedge insertion hole 3 of the coupler 1 before connecting the pair of reinforcing bars. It may be assembled in advance by fitting the washer 13 onto the screw shaft portion 12 and screwing in the tightening nut 14, or after screwing the coupler 1 into the ends of the pair of reinforcing bars.
Insert the wedge 10 and the pair of push plates 20 into the wedge insertion hole 3, and insert the screw shaft portion 1 of the wedge 10.
It is also possible to fit the washer 13 to the holder 2 and screw the tightening nut 14.
ここで、この継手によつて接続される鉄筋３０
は、少なくとも端面からカプラー１の長さの1/2
の寸法に対応する長さの範囲における外周にねじ
があればよく、図示の実施例では棒鋼の両側に軸
方向に延びるリブ３１と、このリブ３１間におい
てねじふし３２とを設けた断面の形状が楕円形の
異形ねじふし鉄筋３０を示している。 Here, the reinforcing bars 30 connected by this joint
is at least 1/2 the length of coupler 1 from the end face
It is sufficient if there is a thread on the outer periphery within a length range corresponding to the dimensions of the steel bar. shows an elliptical irregularly shaped threaded reinforcing bar 30.
いま、カプラー１を一対の鉄筋３０，３０の端
部にねじ込み、そのカプラー１のクサビ挿入孔３
に予め挿入した一対の押し板２０の表面に鉄筋３
０の端面を衝合させてからクサビ１０のねじ軸１
２にねじ込んだ締付ナツト１４の締付けを行なう
と、クサビ１０が軸方向に移動し、そのクサビ１
０の両側に配置した一対の押し板２０が上記クサ
ビ１０の移動方向に対して交差方向に移動する。
このため、一対の鉄筋３０は互に離反する方向に
移動し、その鉄筋３０のねじふし３２とカプラー
１のめねじ２との間の遊びがなくなると共に、ね
じふし３２とめねじ２との軸方向の接触圧力が強
くなり、一対の鉄筋３０を強固に接続することが
できる。 Now, screw the coupler 1 onto the ends of the pair of reinforcing bars 30, 30, and insert the wedge insertion hole 3 of the coupler 1.
A reinforcing bar 3 is placed on the surface of a pair of push plates 20 inserted in advance into the
After aligning the end faces of 0, screw shaft 1 of wedge 10.
When the tightening nut 14 screwed into the wedge 1 is tightened, the wedge 10 moves in the axial direction.
A pair of push plates 20 arranged on both sides of the wedge 10 move in a direction intersecting with the moving direction of the wedge 10.
Therefore, the pair of reinforcing bars 30 move away from each other, the play between the threaded bar 32 of the reinforcing bar 30 and the female thread 2 of the coupler 1 is eliminated, and the axial direction between the threaded bar 32 and the female thread 2 is eliminated. The contact pressure becomes stronger, and the pair of reinforcing bars 30 can be firmly connected.
上記締付ナツト１４の締付けに際しては、締付
ナツト１４をつかむアウターソケツトとチツプ１
６をつかむインナーソケツトとを備え、その両ソ
ケツトが差動回転するようにした電動レンチ、す
なわち、トルクシヤーボルトの締付けに用いられ
るトルクシヤーレンチを用いる。この電動レンチ
を用いて締付ナツト１４の締付作業を行なうと、
締付ナツト１４の所定量の締付後に、チツプ１６
がネツク部１５から破断する。このため、締付ナ
ツト１３の締付力は一定とされ、カプラー１と鉄
筋３０の結合力は常に一定される。 When tightening the tightening nut 14, the outer socket that grips the tightening nut 14 and the tip 1
An electric wrench is used, which is equipped with an inner socket for gripping the bolt 6, and both sockets rotate differentially, that is, a torque shear wrench used for tightening a torque shear bolt. When tightening the tightening nut 14 using this electric wrench,
After tightening the tightening nut 14 by a predetermined amount, the tip 16
is broken from the neck portion 15. Therefore, the tightening force of the tightening nut 13 is kept constant, and the bonding force between the coupler 1 and the reinforcing bar 30 is always kept constant.
第１図ないし第３図に示す実施例では、カプラ
ー１に形成したクサビ挿入孔３の両端の開口を同
じ大きさとしたが、第４図に示すように、上記開
口の大きさを相違させてもよい。第４図に示すよ
うにクサビ挿入孔３の開口の大きさを相違させる
と、大径側の開口からクサビ挿入孔３に挿入した
一対の押し板２０をカプラー１の内面で受けるこ
とができるため、締付ナツト１４の回動作業時に
一対の押し板２０がクサビ挿入孔３から抜け出る
のを防止することができ、ナツト１４の締付け作
業を能率よく行なうことができる。 In the embodiments shown in FIGS. 1 to 3, the openings at both ends of the wedge insertion hole 3 formed in the coupler 1 were made to have the same size, but as shown in FIG. 4, the openings were made to have different sizes. Good too. As shown in FIG. 4, if the opening sizes of the wedge insertion hole 3 are made different, the pair of push plates 20 inserted into the wedge insertion hole 3 from the opening on the larger diameter side can be received on the inner surface of the coupler 1. It is possible to prevent the pair of push plates 20 from slipping out of the wedge insertion hole 3 during rotation of the tightening nut 14, and the tightening operation of the nut 14 can be carried out efficiently.
一般に、鉄筋３０の端面は平面でない場合が多
く、そのような鉄筋の端面に押し板２０の平面を
圧接させると、押し板２０の落付きが悪いため、
前記押し板２０の鉄筋３０と対応する面に溝等の
窪みを形成し、あるいは膨出部を設けて鉄筋に対
する接触面積を小さくして押し板２０の落付きを
計るようにするのが好ましい。 In general, the end faces of the reinforcing bars 30 are often not flat, and if the flat surface of the push plate 20 is pressed against the end face of such reinforcing bars, the push plate 20 will not sit properly.
It is preferable to form a depression such as a groove on the surface of the push plate 20 corresponding to the reinforcing bars 30, or to provide a bulge to reduce the contact area with the reinforcing bars so that the push plate 20 can settle down.
さらに、実施例の場合はクサビ１０の両側面を
傾斜面としたが、クサビ１０の形状はこれに限定
されず、一側面のみ傾斜面としたクサビを採用す
ることができ、この場合、一方の押し板２０を省
略することができる。 Furthermore, in the case of the embodiment, both side surfaces of the wedge 10 are sloped surfaces, but the shape of the wedge 10 is not limited to this, and a wedge with only one side surface sloped can be adopted, and in this case, one side surface is sloped. The push plate 20 can be omitted.
以上のように、この考案は、クサビのねじ軸部
にねじ合わしたナツトを回動して上記クサビを軸
方向に移動させると、そのクサビの側方に配置し
た押し板が横方向に移動してカプラーにねじ込ま
れたねじ付き鉄筋を軸方向に押圧するため、カプ
ラーのめねじと鉄筋とが軸方向に圧接し、上記カ
プラーと鉄筋とを確実に接続することができると
共に、締付ナツトの締付けによりクサビを軸方向
に移動させるため、カプラーやねじ付鉄筋に衝撃
を与えることがなく、これらの部品を破損、変形
させることがない。また、クサビの軸方向の移動
を押し板の横方向の移動に変換して鉄筋を軸方向
に押圧するため、鉄筋とカプラーとを強力に接続
することができると共に、鉄筋の接続時において
締付ナツトを回動させるに要する力が小さくてす
み、鉄筋を能率よく接続することができる。 As described above, in this invention, when the wedge is moved in the axial direction by rotating the nut screwed onto the threaded shaft of the wedge, the push plate placed on the side of the wedge is moved laterally. Since the threaded reinforcing bar screwed into the coupler is pressed in the axial direction, the female thread of the coupler and the reinforcing bar come into pressure contact in the axial direction, making it possible to reliably connect the coupler and the reinforcing bar, and also to tighten the tightening nut. Since the wedge is moved in the axial direction by tightening, there is no impact on the coupler or threaded reinforcing bars, and these parts will not be damaged or deformed. In addition, since the axial movement of the wedge is converted into the lateral movement of the push plate to press the reinforcing bars in the axial direction, it is possible to connect the reinforcing bars and couplers strongly, and to tighten them when connecting the reinforcing bars. The force required to rotate the nut is small, and reinforcing bars can be connected efficiently.
さらに、アウターソケツトとインナーソケツト
を備える電動レンチを用いて締付ナツトを締付け
ると、ネツク部に作用するトルクが設定トルクを
越えるとチツプが破断して締付作業が完了するた
め、締付ナツトの締付力が一定し、カプラーとね
じ付鉄筋とを常に一定の結合力で接続することが
でき、信頼性の高い接続を得ることができる。 Furthermore, when tightening a tightening nut using an electric wrench that has an outer socket and an inner socket, if the torque acting on the neck exceeds the set torque, the tip will break and the tightening work will be completed, so it will be difficult to tighten the nut. The tightening force of the nut is constant, the coupler and the threaded reinforcing bar can always be connected with a constant bonding force, and a highly reliable connection can be obtained.
第１図はこの考案に係る継手の一実施例を示す
使用状態の一部切欠正面図、第２図は同上の平面
図、第３図は同上の縦断側面図、第４図は同上継
手の他の実施例を示す一部切欠正面図である。
１……カプラー、２……めねじ、１０……くさ
び、１２……ねじ軸部、１４……締付ナツト、１
５……ネツク部、１６……チツプ、２０……押し
板。
Fig. 1 is a partially cutaway front view showing an embodiment of the joint according to the invention in use, Fig. 2 is a plan view of the same, Fig. 3 is a longitudinal sectional side view of the same, and Fig. 4 is a cross-sectional view of the same as the above. FIG. 7 is a partially cutaway front view showing another embodiment. 1...Coupler, 2...Female thread, 10...Wedge, 12...Screw shaft, 14...Tightening nut, 1
5... Net section, 16... Chip, 20... Push board.
Claims (1)
通したクサビ挿入孔を形成した筒形カプラーと、
上記クサビ挿入孔に挿入されるクサビと、このク
サビの少なくとも片側に配置される押し板とから
成り、上記クサビの端部には上記クサビ挿入孔か
ら突出するねじ軸部を形成し、そのねじ軸部の先
端に所定大きさのトルクが作用すると破断するネ
ツク部を介してチツプを設け、上記ねじ軸部に締
付ナツトをねじ係合したねじ付き鉄筋用の継手。 a cylindrical coupler having a female thread on the inner surface and forming a penetrating wedge insertion hole that intersects with the axis;
It consists of a wedge that is inserted into the wedge insertion hole and a push plate that is placed on at least one side of the wedge, and the end of the wedge has a screw shaft that projects from the wedge insertion hole. A joint for a threaded reinforcing bar in which a tip is provided through a neck part that breaks when a predetermined amount of torque is applied to the tip of the part, and a tightening nut is threadedly engaged with the threaded shaft part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13289783U JPS6040718U (en) | 1983-08-26 | 1983-08-26 | Fittings for threaded reinforcing bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13289783U JPS6040718U (en) | 1983-08-26 | 1983-08-26 | Fittings for threaded reinforcing bars |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6040718U JPS6040718U (en) | 1985-03-22 |
| JPH0415863Y2 true JPH0415863Y2 (en) | 1992-04-09 |
Family
ID=30299967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13289783U Granted JPS6040718U (en) | 1983-08-26 | 1983-08-26 | Fittings for threaded reinforcing bars |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040718U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152244A (en) * | 1979-05-17 | 1980-11-27 | Sumitomo Metal Ind | Method of heightening rigidity of screw joint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780528U (en) * | 1980-11-05 | 1982-05-18 |
-
1983
- 1983-08-26 JP JP13289783U patent/JPS6040718U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152244A (en) * | 1979-05-17 | 1980-11-27 | Sumitomo Metal Ind | Method of heightening rigidity of screw joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6040718U (en) | 1985-03-22 |
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