JPH1025857A - Junction bolt for coupling reinforcing steel bars - Google Patents
Junction bolt for coupling reinforcing steel barsInfo
- Publication number
- JPH1025857A JPH1025857A JP19831396A JP19831396A JPH1025857A JP H1025857 A JPH1025857 A JP H1025857A JP 19831396 A JP19831396 A JP 19831396A JP 19831396 A JP19831396 A JP 19831396A JP H1025857 A JPH1025857 A JP H1025857A
- Authority
- JP
- Japan
- Prior art keywords
- polygonal
- bolt
- bolt shaft
- tightening
- ring
- 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
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鉄筋の端部相互間
を連結するために使用される鉄筋連結用中継ぎボルトに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting rod for connecting reinforcing bars used for connecting ends of reinforcing bars.
【０００２】[0002]
【従来の技術】従来、この種の鉄筋の連結手段として、
連結対象であるそれぞれの異形鉄筋の端部に金属製の短
管からなる接続スリーブの一側を塑性変形によって固着
し、それらの接続スリーブの他側に互いに逆ネジの関係
の雌ネジを形成するとともに、それらの双方の雌ネジに
螺合し得る逆ネジの雄ネジを両側に形成し、中央に六角
形からなる締付部を形成した中継ぎボルトを用意してお
き、前記両接続スリーブの雌ネジと中継ぎボルトの雄ネ
ジをそれぞれ螺合させて締付けることにより両異形鉄筋
を連結するという技術手段が広く知られている（特公昭
５３−７７３２号公報）。また、中継ぎボルトをボルト
軸部分と締付リング部分とに分離構成し、かつそれらを
ボルト軸線方向にのみ移動可能に組合わせることによ
り、締付時に前記締付リング部が両異形鉄筋の端部相互
間の中央部に移動して均一な締付状態が得られるように
構成するとともに、さらに前記ボルト軸部と締付リング
部とを離脱できないように構成し、一方部材の紛失や使
用時の締付リング部の脱落を防止するという技術手段が
開示されている（実公平３−４７０５０号公報、実公平
３−４７０５１号公報）。2. Description of the Related Art Conventionally, as means for connecting such a reinforcing bar,
One side of a connecting sleeve made of a metal short pipe is fixed to the end of each deformed reinforcing bar to be connected by plastic deformation, and female threads having a reverse screw relationship to each other are formed on the other side of the connecting sleeves. In addition, a male screw of a reverse screw which can be screwed into both of the female screws is formed on both sides, and a relay bolt having a hexagonal tightening portion formed in the center is prepared, and the females of the two connection sleeves are prepared. Technical means of connecting both deformed reinforcing bars by screwing and tightening a male screw of a screw and a male screw of a relay bolt are widely known (Japanese Patent Publication No. 53-7732). In addition, the connecting bolt is separated into a bolt shaft portion and a tightening ring portion, and these are combined so as to be movable only in the axial direction of the bolt, so that the tightening ring portion at the time of tightening has the ends of both deformed reinforcing bars. It is configured to be moved to the center part between them so as to obtain a uniform tightening state, and further configured so that the bolt shaft part and the tightening ring part cannot be detached. Technical means for preventing the fastening ring from falling off are disclosed (Japanese Utility Model Publication No. 3-47050 and Japanese Utility Model Publication No. 3-47051).
【０００３】[0003]
【発明が解決しようとする課題】ところで、前者の従来
技術においては、六角形の締付部がボルト軸部と一体に
形成されていたため、締付時において一方の鉄筋の端部
が締付部の端面に当接した以降は、その鉄筋自体の回転
を伴わずに他方の鉄筋に対する締付はできないという欠
点があった。これに対して、後者の従来技術は、締付リ
ング部をボルト軸線方向に移動可能に構成することによ
り前記欠点を解消したものであるが、締付リング部に加
えられる締付回転力の伝達がボルト軸部側に付設された
トルクコントロール軸からなるピン状部材を介して行う
ように構成されていたため、前記締付回転力の伝達がそ
のピン状部材の部分に局部的に集中することになるた
め、特に締付リング部とボルト軸部との嵌合精度がよく
ない場合などには、締付回転力によって締付リング部と
ボルト軸部との軸心がずれて接触部が一方へ偏り、食付
き現象を引き起したり、締付リング部のスムーズな移動
が害されるなどの不具合を生じやすいといった問題があ
った。By the way, in the former prior art, since the hexagonal tightening portion is formed integrally with the bolt shaft portion, one end of one rebar is tightened at the time of tightening. There is a disadvantage that after the contact with the end surface, the reinforcing bar cannot be fastened to the other reinforcing bar without the rotation of the reinforcing bar itself. On the other hand, in the latter conventional technique, the above-mentioned disadvantage is solved by configuring the tightening ring portion so as to be movable in the axial direction of the bolt, but the transmission of the tightening torque applied to the tightening ring portion is performed. Is configured to be performed via a pin-shaped member formed of a torque control shaft attached to the bolt shaft side, so that the transmission of the tightening rotational force is locally concentrated on the portion of the pin-shaped member. Therefore, especially when the fitting accuracy between the tightening ring and the bolt shaft is not good, the shaft center between the tightening ring and the bolt shaft is displaced by the tightening rotational force, and the contact part moves to one side. There has been a problem that such problems as bias and biting phenomena are caused, and smooth movement of the fastening ring portion is impaired.
【０００４】本発明は、このような従来技術の問題点を
解決するためになされたもので、締付回転力の伝達部を
ボルト軸部を中心に複数箇所に分散し、かつ締付リング
とボルト軸部との接触面積を増やすことにより、ボルト
軸部への回転力の伝達及び締付リングの移動機能を改善
し、これにより鉄筋の連結作業の容易化及び確実性を促
進し、延いては締付リング部とボルト軸部の加工精度に
対する適応範囲の広い中継ぎボルトを提供することを目
的とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. The transmitting portion for transmitting the tightening torque is distributed to a plurality of positions around the bolt shaft portion, and the tightening ring and the tightening ring are connected to each other. By increasing the contact area with the bolt shaft, the transmission of rotational force to the bolt shaft and the function of moving the tightening ring are improved, thereby facilitating the connection work of reinforcing bars and promoting reliability, and It is an object of the present invention to provide a relay bolt having a wide range of adaptability to the processing accuracy of a tightening ring portion and a bolt shaft portion.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記課題を解
決するため、連結対象であるそれぞれの鉄筋側の端部に
逆ネジの関係に形成された各雌ネジ部に対して螺合可能
に形成された雄ネジ部を両側に有し、かつそれらの雄ネ
ジ部の中間部に適宜角数からなる多角形部を形成したボ
ルト軸部と、前記多角形部に移動可能に嵌合し得る多角
口部を有し、かつ外周面に締付部が形成された締付リン
グ部とから中継ぎボルトを構成し、前記ボルト軸部の多
角形部と締付リングの多角口部との相対移動可能な嵌合
を介して締付回転力を伝達することを特徴とする。さら
に具体化して、前記ボルト軸部の多角形部の両側に形成
される雄ネジ部のネジ外径を前記締付リング部に形成さ
れる多角口部の半径方向の最小寸法より大きく形成する
ことにより、前記多角口部を介して締付リング部をボル
ト軸部の前記雄ネジ部相互間に移動可能に閉込めてボル
ト軸部と締付リング部とを一体化したことを特徴とす
る。また、その雄ネジ間に閉込める方式に替え、前記締
付リングの両側端面の多角口部周縁部をそれぞれ塑性変
形させて前記ボルト軸部の多角形部の両側端面に係止可
能なストッパ部を形成し、前記ボルト軸部の多角形部を
それらのストッパ間に移動可能に閉込めてボルト軸部と
締付リング部とを一体化したことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is capable of screwing with each female screw portion formed in a reverse screw relationship at the end of each rebar side to be connected. A bolt shaft portion having a male screw portion formed on both sides, and a polygonal portion having an appropriate number of corners formed at an intermediate portion of the male screw portion, and movably fitted to the polygonal portion. And a tightening ring having a tightening portion formed on the outer peripheral surface thereof, and forming a relay bolt. The polygonal portion of the bolt shaft portion and the polygonal opening of the tightening ring have a relative position. It is characterized in that the tightening torque is transmitted via a movable fitting. More specifically, the external thread diameter of the external thread portion formed on both sides of the polygonal portion of the bolt shaft portion is formed to be larger than the minimum radial dimension of the polygonal opening portion formed in the tightening ring portion. Thus, the fastening ring portion is movably confined between the male screw portions of the bolt shaft portion via the polygonal opening portion, and the bolt shaft portion and the fastening ring portion are integrated. In addition, instead of the method of confining between the external threads, a stopper portion which can be plastically deformed on each side edge of the polygonal opening on both side surfaces of the tightening ring and locked on both side surfaces of the polygonal portion of the bolt shaft portion. And the polygonal portion of the bolt shaft portion is movably confined between the stoppers to integrate the bolt shaft portion and the tightening ring portion.
【０００６】[0006]
【発明の実施の形態】前記ボルト軸部に形成する多角形
部の角数は、三角以上の適宜の角数が適用可能である。
締付リングに形成される多角口部の角数は、前記多角形
部に嵌合される関係上、少なくともその多角形部と同数
以上の角数に設定され、例えば多角形部の倍数の角数も
選択が可能である。なお、それらのボルト軸部の多角形
部及び締付リングの多角口部は、必ずしも厳密な多角形
に形成される必要はなく、それぞれの角部で係合して締
付回転力を伝達し得るものであれば、各角部間の平面部
の形状の多少の変形は可能である。また、締付リングの
外周面に形成される締付部としては、締付リングの外形
を六角形などの適宜の多角形に形成して締付部とするこ
とが一般的であるが、他の締付形態でも構わない。DESCRIPTION OF THE PREFERRED EMBODIMENTS The number of corners of the polygonal portion formed on the bolt shaft may be an appropriate number of triangles or more.
The number of corners of the polygonal opening formed in the tightening ring is set to at least the same number or more as the polygonal part because of the fitting to the polygonal part. The number is also selectable. Incidentally, the polygonal portion of the bolt shaft portion and the polygonal opening portion of the tightening ring do not necessarily need to be formed in a strict polygonal shape. If it can be obtained, a slight deformation of the shape of the plane portion between the corners is possible. Also, as the tightening portion formed on the outer peripheral surface of the tightening ring, it is general that the outer shape of the tightening ring is formed into an appropriate polygon such as a hexagon to form the tightening portion. May be used.
【０００７】前記ボルト軸部に形成する多角形部や締付
リングの幅は、場合に応じて適宜の寸法に設定すればよ
い。その場合、重要なことは、前記締付リングを介して
行われる締付作業の過程において、その締付リングのボ
ルト軸部に対する相対的な移動が制限されるようなもの
であってはならないということと、鉄筋側の端面と締付
リングの両端面との接合に支障の出るようなものであっ
てはならないということである。[0007] The width of the polygonal portion and the tightening ring formed on the bolt shaft may be set to appropriate dimensions depending on the case. In that case, it is important that in the course of the tightening operation performed through the tightening ring, the movement of the tightening ring relative to the bolt shaft should not be limited. That is, it should not be such that the joining between the end face on the rebar side and both end faces of the fastening ring is hindered.
【０００８】[0008]
【実施例】以下、図面を用いて本発明の実施例に関して
説明する。図１〜図６は本発明の一実施例を示したもの
である。図１は本発明に係る中継ぎボルトを使用して鉄
筋を連結した状態を上半部を断面して示した部分縦断面
図、図２はそのＡ−Ａ断面図である。図中、１は中継ぎ
ボルトで、ボルト軸部２と、後述するようにそのボルト
軸部２に移動可能に嵌合された締付リング部３とから構
成される。ボルト軸部２の一側には右ネジからなる雄ネ
ジ部２ａが形成され、他側には左ネジからなる雄ネジ２
ｂが形成されている。すなわち、ボルト軸部の両側には
逆ネジの関係に雄ネジ部２ａと雄ネジ部２ｂが形成され
ている。そして、一方の右ネジからなる雄ネジ部２ａに
対しては鉄筋４の端部に固着された接続スリーブ５に形
成された右ネジからなる雌ネジが螺合されると同時に、
他方の左ネジからなる雄ネジ部２ｂに対しては鉄筋６の
端部に固着された接続スリーブ７に形成された左ネジか
らなる雌ネジが螺合され、その螺合状態において、前記
締付リング部３を介してボルト軸部２を締付方向に回転
することにより、両接続スリーブ５，７を介して鉄筋
４，６を共に締付リング部３側に引付け固定することに
よって、両鉄筋４，６を連結するものである。Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of the present invention. FIG. 1 is a partial longitudinal sectional view showing a state in which rebars are connected by using a connecting bolt according to the present invention, in which an upper half is sectioned, and FIG. 2 is a sectional view taken along line AA. In the drawing, reference numeral 1 denotes a connecting bolt, which comprises a bolt shaft 2 and a tightening ring 3 movably fitted to the bolt shaft 2 as described later. On one side of the bolt shaft portion 2, a male screw portion 2a made of a right-hand thread is formed, and on the other side, a male screw portion 2 made of a left-hand thread.
b is formed. That is, the male screw portion 2a and the male screw portion 2b are formed on both sides of the bolt shaft portion in a reverse screw relationship. At the same time, a female screw made of a right screw formed on a connection sleeve 5 fixed to an end of the reinforcing bar 4 is screwed into the male screw part 2a made of one right screw.
A female screw made of a left-hand thread formed on a connection sleeve 7 fixed to the end of the reinforcing bar 6 is screwed into the male screw part 2b made of the other left-hand screw. By rotating the bolt shaft portion 2 in the tightening direction via the ring portion 3, the rebars 4, 6 are pulled together and fixed to the tightening ring portion 3 side via the two connection sleeves 5, 7, thereby securing the both ends. The reinforcing bars 4 and 6 are connected.
【０００９】次に、本発明の特徴点である前記ボルト軸
部２と締付リング部３との嵌合部に関して詳しく説明す
る。図３はボルト軸部２のネジ形成前の素材状態を示し
た正面図である。また、図４はその側面図を示したもの
で、（イ）はネジ形成前、（ロ）はネジ形成後の状態を
示したものである。図示のように、本実施例において
は、ボルト軸部２の中央部に六角形からなる厚さＴ1の
嵌合用の多角形部８が形成されている。この場合、前述
のように多角形部８の角数は変更が可能である。さら
に、図４の（イ）に示したように、ネジ形成前において
は、ボルト軸部２の軸径Ｄ1が多角形部８を構成する六
角形の各平行面間の間隔Ｗ1と同じか、若干小さめに形
成されている。そして、本実施例では、ネジの形成手段
として転造形成方法を採用する結果、ネジ形成後におい
ては、図４の（ロ）に示したように、ネジ外径Ｄ2が前
記多角形部８を構成する六角形の半径方向の最小寸法と
なる各平行面間の間隔Ｗ1より大きくなる点に特徴を有
する。Next, the fitting portion between the bolt shaft portion 2 and the tightening ring portion 3 which is a feature of the present invention will be described in detail. FIG. 3 is a front view showing a material state of the bolt shaft portion 2 before forming a screw. FIG. 4 shows a side view thereof, wherein (a) shows a state before screw formation and (b) shows a state after screw formation. As shown, in this embodiment, the polygonal portion 8 for fitting the thickness T 1 consisting of hexagonal central portion of the bolt shank 2 is formed. In this case, the number of corners of the polygonal portion 8 can be changed as described above. Furthermore, as shown in (b) of FIG. 4, before the screw formation is the same as the interval W 1 between the parallel surfaces of the hexagonal shaft diameter D 1 of the bolt shank 2 constitute a polygonal section 8 Or, it is formed slightly smaller. In the present embodiment, as a result of employing the rolling formation method as forming means of the screw, after the screw formed, as shown in (b) of FIG. 4, thread diameter D 2 is the polygonal portion 8 characterized in that the greater than the distance W 1 between the parallel surfaces of the hexagonal radial minimum dimension of which constitutes the.
【００１０】図５及び図６は前記締付リング部３を示し
たもので、図５はその側面図、図６は縦断面図を示した
ものである。図５に示すように、締付リング部３の中心
部には、前記ボルト軸部２の多角形部８が移動可能にゆ
るく嵌合し得るように、各平行面間の間隔Ｗ2を多角形
部８の各平行面間の間隔Ｗ1より若干大きめに設定した
六角形からなる多角口部９が開口されている。また、そ
の多角口部９の両端部分には、図５に示した前記ネジ外
径Ｄ2より若干大きめの直径Ｄ3からなる座ぐり加工が、
図６のように両端面からそれぞれ寸法Ｌ1，Ｌ2の深さだ
け施されている。これにより、ボルト軸部２の両側に転
造加工により形成される雄ネジ部２ａ，２ｂのネジ外径
Ｄ2はネジ形成前の軸径Ｄ1より若干大きくなり、前記多
角口部９を通過できなくなるが、直径Ｄ3の座ぐりの部
分だけ自由に嵌入し得ることになる。すなわち、雄ネジ
部２ａ，２ｂが通過できない六角形の多角口部９の部分
は厚さＴ2の部分ということになる。その結果、前記多
角形部の厚さＴ1、すなわち前記雄ネジ部２ａと雄ネジ
部２ｂとの間隔からそれらの雄ネジ部２ａ，２ｂが通過
できない多角口部９の厚さＴ2を差引いた残りの寸法
が、ボルト軸部２と締付リング部３とが相対的に移動可
能な範囲となる。FIGS. 5 and 6 show the tightening ring portion 3. FIG. 5 is a side view and FIG. 6 is a longitudinal sectional view. As shown in FIG. 5, in the center of the clamping ring section 3 such that the polygonal portion 8 of the bolt shaft portion 2 can loosely fitted movably, multi spacing W 2 between the parallel surfaces polygonal opening 9 made of hexagons has slightly larger set than distance W 1 between the parallel surfaces of the rectangular portion 8 is opened. Also, on both end portions of the polygonal opening 9, it is counter boring consisting slightly larger diameter D 3 than the thread diameter D 2 shown in FIG. 5,
As shown in FIG. 6, the protrusions are provided to the depths L 1 and L 2 from both end surfaces. Accordingly, thread diameter D 2 of the male screw portion 2a, 2b formed by rolling on both sides of the bolt shank 2 is slightly larger than the shaft diameter D 1 of the front thread forming, through said polygonal opening 9 can not but will be capable of freely fitted only counterbored portion of a diameter D 3. That is, the portion of the polygonal opening 9 of the hexagonal male screw portion 2a, 2b can not pass it will be referred to as part of the thickness T 2. As a result, the thickness T 2 of the polygonal opening 9 through which the male screw portions 2a and 2b cannot pass is subtracted from the thickness T 1 of the polygonal portion, that is, the interval between the male screw portions 2a and 2b. The remaining dimension is a range in which the bolt shaft portion 2 and the tightening ring portion 3 can relatively move.
【００１１】しかして、本実施例の中継ぎボルト１を形
成するに当っては、先ず図３及び図４に示したネジ形成
前のボルト軸部２と、図５及び図６に示した締付リング
部３の作製がそれぞれ別個に行われる。次いでボルト軸
部２のいずれか一方の雄ネジ部、例えば左ネジからなる
雄ネジ部２ｂを転造加工により形成する。しかる後、ネ
ジの形成されていない他方の軸部を前記締付リング部３
の多角口部９内に貫通させ、雄ネジ部２ｂの根元端部が
深さＬ2の座ぐり部分を通過して多角口部９の縁部に当
接まで挿入した後、締付リング部３の反対側に突出した
軸部をネジ転造機にかけて右ネジからなる雄ネジ部２ａ
を形成する。この場合、座ぐりの深さＬ2が他方のＬ1よ
り大きく設定してあるので、ネジ転造機にかけて雄ネジ
部２ａを形成する際に軸部をより多く突出できるため作
業がし易い。なお、ネジ形成前の軸部の軸径Ｄ1は多角
口部９の各平行面間の間隔Ｗ2より小さく設定されてい
るのでその多角口部９内を通過し得るが、転造により雄
ネジ部２ａが形成された後はそのネジ外径Ｄ2が前記間
隔Ｗ2より大きくなり、締付リング部３が多角口部９を
介して両雄ネジ２ａ，２ｂ相互間に閉込められるため、
締付リング部３がボルト軸部２から抜出すことが阻止さ
れ、両者は一体化されることになる。In forming the relay bolt 1 of this embodiment, first, the bolt shaft portion 2 before screw formation shown in FIGS. 3 and 4 and the tightening bolt shown in FIGS. 5 and 6 are formed. The production of the ring portions 3 is performed separately. Next, one of the male screw portions of the bolt shaft portion 2, for example, a male screw portion 2b composed of a left-hand thread is formed by rolling. Thereafter, the other shaft portion on which the screw is not formed is connected to the tightening ring portion 3.
Is passed through the polygonal opening 9, after insertion to contact the edge of the polygonal opening 9 through the spot facing portion proximal end of the depth L 2 of the male threaded portion 2b, clamping ring portion 3 is screwed on a shaft protruding on the opposite side of the screw threading machine 3 to form a male screw 2a comprising a right-hand thread.
To form In this case, since the depth L 2 of the pocket has been set larger than the other L 1, easily work because it more protruding shaft portion when forming the male screw portion 2a toward thread rolling machine. The shaft diameter D 1 of the shaft portion before the screw forming can pass through the polygonal opening 9 because it is smaller than the distance W 2 between the parallel surfaces of the polygonal opening 9, but the male by rolling because its thread diameter D 2 is larger than the spacing W 2, two great men screw 2a clamping ring section 3 via the polygonal opening 9, confined between 2b mutually after screw portion 2a is formed,
The fastening ring portion 3 is prevented from being pulled out of the bolt shaft portion 2, and both are integrated.
【００１２】図７〜図１０は本発明の他の実施例を示し
たものである。図中、１０は本実施例における中継ぎボ
ルトを示したもので、前述の実施例と同様に、ボルト軸
部１１と締付リング部１２とから構成されている。ボル
ト軸部１１の両側には右ネジからなる雄ネジ部１１ａと
左ネジからなる雄ネジ部１１ｂがそれぞれ形成されると
ともに、それらの中間部には六角形からなる多角形部１
３が形成されており、その多角形部１３を前記締付リン
グ部１２に形成された六角形からなる多角口部１４内に
移動可能に嵌合することにより、締付リング部１２に加
えられる締付回転力をボルト軸部１１に伝達するように
構成されている。ここで、本実施例の中継ぎボルト１０
が前記実施例の中継ぎボルト１と異なる点は、雄ネジ部
１１ａ，１１ｂのネジ外径Ｄ4が多角口部１４の平行面
間の間隔Ｗ3より小さく形成され、後述のようにボルト
軸部１１と締付リング部１２とを一体化させる方式が異
なる点である。7 to 10 show another embodiment of the present invention. In the drawing, reference numeral 10 denotes a relay bolt in this embodiment, which comprises a bolt shaft portion 11 and a tightening ring portion 12, as in the above-described embodiment. On both sides of the bolt shaft portion 11, a male screw portion 11a made of a right-hand thread and a male screw portion 11b made of a left-hand screw are formed, and a polygonal portion 1 made of a hexagon is formed in the middle between them.
3 is formed, and the polygonal portion 13 is movably fitted into a hexagonal polygonal opening portion 14 formed on the tightening ring portion 12 to be added to the tightening ring portion 12. The fastening torque is transmitted to the bolt shaft 11. Here, the relay bolt 10 of this embodiment is used.
There wherein is different from the relay bolt 1 embodiment, the male screw portion 11a, thread diameter D 4 of 11b is formed smaller than the distance W 3 between the parallel surfaces of the polygonal opening 14, bolt shaft portion as described below 11 is different from the method of integrating the fastening ring portion 12 with the fastening ring portion 12.
【００１３】しかして、本実施例の中継ぎボルト１０の
形成に当っては、前述の実施例の場合と異なり、ボルト
軸部１１の両側の雄ネジ１１ａ，１１ｂは、共に予め形
成しておく。その場合、雄ネジ１１ａ，１１ｂのネジ形
成方法は、必ずしも転造手段にこだわる必要はない。図
７に示したように、ボルト軸部１１の多角形部１３を締
付リング部１２の多角口部１４内に移動可能にゆるく嵌
合した後、図９の側面図及び図１０のＢ−Ｂ拡大断面に
示したように、締付リング部１２に形成された多角口部
１４の両側周縁部を、例えば直径Ｄ5のプレス面を有す
る図示しないプレス手段等を用いて塑性変形させ、多角
口部１４の両端周縁部に前記多角形部１３が係止し得る
内方に突出変形したストッパ部１５，１６を形成する。
本実施例の場合には、それらのストッパ部１５，１６相
互間に前記多角形部１３を閉込めることにより、締付リ
ング部１２のボルト軸部１１からの抜出しを阻止して両
者を一体化するように構成したものである。なお、図
中、１７はプレスによる凹部である。However, in forming the relay bolt 10 of the present embodiment, unlike the above-described embodiment, the male screws 11a and 11b on both sides of the bolt shaft 11 are both formed in advance. In this case, the method for forming the male screws 11a and 11b does not necessarily need to be limited to rolling means. As shown in FIG. 7, after the polygonal portion 13 of the bolt shaft portion 11 is loosely and movably fitted into the polygonal opening 14 of the tightening ring portion 12, the side view of FIG. as shown in B enlarged sectional, both side peripheral portions of the polygonal opening 14 formed in the clamping ring portion 12, for example, by plastic deformation using a press means (not shown) or the like having a press surface with a diameter D 5, polygonal The stoppers 15 and 16 are formed at the peripheral edges of both ends of the mouth 14 so as to be inwardly protruded and deformed so that the polygon 13 can be locked.
In the case of this embodiment, the polygonal portion 13 is confined between the stopper portions 15 and 16 to prevent the tightening ring portion 12 from being pulled out from the bolt shaft portion 11 and to integrate them. It is configured so that In the drawing, reference numeral 17 denotes a recess formed by pressing.
【００１４】[0014]
【発明の効果】本発明によれば、次の効果を得ることが
できる。 （１）締付回転力の伝達部をボルト軸部の周りに分散し
た結果、ボルト軸部が周囲の複数箇所から回転されるの
で、そのボルト軸線を中心とした確実な回転力の伝達が
可能である。 （２）締付リング部とボルト軸部との間に多少のガタが
存在しても、従来のように一方へ偏って食付き現象を引
き起すことなく、ボルト軸線を中心に回転力が加わるの
で、より確実な締付作用が得られる。したがって、加工
精度に対する適応範囲が広くなる。 （３）締付リング部とボルト軸部との当接部がボルト軸
部の周囲に複数箇所形成され、その接触面積が増加され
るので、より大きな締付力に対応できる。また、前記当
接部の接触面積が大きいことから、締付リングのボルト
軸方向の移動もきわめてスムーズであり、この点からも
加工精度に対する適応性が拡がる。 （４）転造ネジによるボルト軸部のネジ外径の増大ある
いは締付リングの多角口部周縁部の塑性変形によるスト
ッパ部の形成を利用することにより、簡便にボルト軸部
と締付リング部とを一体化することができ、一方部材の
紛失や連結作業時における両部材の離脱を防止できる。According to the present invention, the following effects can be obtained. (1) As a result of dispersing the tightening torque transmitting portion around the bolt shaft, the bolt shaft is rotated from a plurality of locations around the bolt shaft, so that the torque can be reliably transmitted around the bolt axis. It is. (2) Even if there is some backlash between the tightening ring portion and the bolt shaft portion, a rotational force is applied around the bolt axis without causing a biting phenomenon in one direction as in the related art. Therefore, a more reliable tightening action can be obtained. Therefore, the applicable range for the processing accuracy is widened. (3) A plurality of contact portions between the tightening ring portion and the bolt shaft portion are formed around the bolt shaft portion and the contact area thereof is increased, so that it is possible to cope with a larger tightening force. Further, since the contact area of the contact portion is large, the movement of the tightening ring in the axial direction of the bolt is extremely smooth. (4) The bolt shaft portion and the tightening ring portion can be easily formed by utilizing the increase of the screw outer diameter of the bolt shaft portion by the rolled screw or the formation of the stopper portion by the plastic deformation of the periphery of the polygonal opening of the tightening ring. Can be integrated, and loss of one member or detachment of both members during the connection operation can be prevented.
【図１】 本発明の実施例の使用状態を上半部を断面し
て示した部分縦断面図である。FIG. 1 is a partial longitudinal sectional view showing a use state of an embodiment of the present invention, in which an upper half portion is sectioned.
【図２】 図１中のＡ−Ａ縦断面図である。FIG. 2 is a vertical sectional view taken along the line AA in FIG.
【図３】 ボルト軸部のネジ形成前の状態を示した正面
図である。FIG. 3 is a front view showing a state before a screw is formed in a bolt shaft portion.
【図４】 同側面図である。FIG. 4 is a side view of the same.
【図５】 締付リング部を示した側面図である。FIG. 5 is a side view showing a fastening ring portion.
【図６】 同縦断面図である。FIG. 6 is a longitudinal sectional view of the same.
【図７】 本発明の他の実施例の嵌合状態を示した縦断
面図である。FIG. 7 is a longitudinal sectional view showing a fitted state of another embodiment of the present invention.
【図８】 同側面図である。FIG. 8 is a side view of the same.
【図９】 ストッパ部形成後の状態を示した側面図であ
る。FIG. 9 is a side view showing a state after a stopper portion is formed.
【図１０】 図９中のＢ−Ｂ断面図である。FIG. 10 is a sectional view taken along line BB in FIG. 9;
１…中継ぎ用ボルト、２…ボルト軸部、２ａ，２ｂ…雄
ネジ部、３…締付リング部、４…鉄筋、５…接続スリー
ブ、６…鉄筋、７…接続スリーブ、８…多角形部、９…
多角口部、１０…中継ぎ用ボルト、１１…ボルト軸部、
１２…締付リング部、１３…多角形部、１４…多角口
部、１５，１６…ストッパ部、１７…凹部DESCRIPTION OF SYMBOLS 1 ... Joint bolt, 2 ... Bolt shaft part, 2a, 2b ... Male thread part, 3 ... Tightening ring part, 4 ... Reinforcing bar, 5 ... Connection sleeve, 6 ... Reinforcing bar, 7 ... Connection sleeve, 8 ... Polygonal part , 9 ...
Polygonal mouth, 10 ... joint bolt, 11 ... bolt shaft,
12: fastening ring portion, 13: polygonal portion, 14: polygonal opening portion, 15, 16: stopper portion, 17: concave portion
Claims (3)
に逆ネジの関係に形成された各雌ネジ部に対して螺合可
能に形成された雄ネジ部を両側に有し、かつそれらの雄
ネジ部の中間部に適宜角数からなる多角形部を形成した
ボルト軸部と、前記多角形部に移動可能に嵌合し得る多
角口部を有し、かつ外周面に締付部が形成された締付リ
ング部とから構成され、前記ボルト軸部の多角形部と締
付リングの多角口部との相対移動可能な嵌合を介して締
付回転力を伝達することを特徴とする鉄筋連結用中継ぎ
ボルト。1. A male screw part formed on each side of a rebar side to be connected, which can be screwed to each female screw part formed in a reverse screw relationship at both ends thereof, and A bolt shaft portion having a polygonal portion having an appropriate number of corners formed at an intermediate portion of the male screw portion, a polygonal mouth portion which can be movably fitted to the polygonal portion, and a tightening portion on the outer peripheral surface. And transmitting the tightening torque through a relatively movable fit between the polygonal portion of the bolt shaft and the polygonal opening of the tightening ring. A joint bolt for connecting reinforcing bars.
される雄ネジ部のネジ外径を前記締付リング部に形成さ
れる多角口部の半径方向の最小寸法より大きく形成する
ことにより、前記多角口部を介して締付リング部をボル
ト軸部の前記雄ネジ部相互間に移動可能に閉込めたこと
を特徴とする請求項１記載の鉄筋連結用中継ぎボルト。2. The external diameter of a male screw portion formed on both sides of the polygonal portion of the bolt shaft portion is formed to be larger than the minimum radial dimension of the polygonal opening portion formed on the tightening ring portion. The joint bolt according to claim 1, wherein the fastening ring portion is movably confined between the external thread portions of the bolt shaft portion via the polygonal opening.
縁部をそれぞれ塑性変形させて前記ボルト軸部の多角形
部の両側端面に係止可能なストッパ部を形成し、前記ボ
ルト軸部の多角形部をそれらのストッパ間に移動可能に
閉込めたことを特徴とする請求項１記載の鉄筋連結用中
継ぎボルト。3. A stopper portion which can be locked to both side end surfaces of the polygonal portion of the bolt shaft portion by plastically deforming peripheral edges of the polygonal opening portions on both side end surfaces of the tightening ring. 2. The connecting bolt for reinforcing bar connection according to claim 1, wherein said polygonal portion is movably confined between said stoppers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19831396A JP3763891B2 (en) | 1996-07-09 | 1996-07-09 | Reinforcing bar connecting bolts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19831396A JP3763891B2 (en) | 1996-07-09 | 1996-07-09 | Reinforcing bar connecting bolts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1025857A true JPH1025857A (en) | 1998-01-27 |
| JP3763891B2 JP3763891B2 (en) | 2006-04-05 |
Family
ID=16389056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19831396A Expired - Fee Related JP3763891B2 (en) | 1996-07-09 | 1996-07-09 | Reinforcing bar connecting bolts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3763891B2 (en) |
-
1996
- 1996-07-09 JP JP19831396A patent/JP3763891B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3763891B2 (en) | 2006-04-05 |
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