JP3763891B2 - Reinforcing bar connecting bolts - Google Patents

Reinforcing bar connecting bolts Download PDF

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Publication number
JP3763891B2
JP3763891B2 JP19831396A JP19831396A JP3763891B2 JP 3763891 B2 JP3763891 B2 JP 3763891B2 JP 19831396 A JP19831396 A JP 19831396A JP 19831396 A JP19831396 A JP 19831396A JP 3763891 B2 JP3763891 B2 JP 3763891B2
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Japan
Prior art keywords
polygonal
tightening
bolt shaft
bolt
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.)
Expired - Fee Related
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JP19831396A
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Japanese (ja)
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JPH1025857A (en
Inventor
正義 中崎
康昭 秋田
勝義 亀山
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岡部株式会社
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Description

【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。
【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)。
【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。
【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。
【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し得るように構成するとともに、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たことを特徴とする。
【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。
【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。
【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〜図は本発明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、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13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。そして、使用に際しては、一方の右ネジからなる雄ネジ部11aに対して一方の鉄筋の端部に固着された接続スリーブに形成された右ネジからなる雌ネジが螺合されるとともに、他方の左ネジからなる雄ネジ部11bに対して他方の鉄筋の端部に固着された接続スリーブに形成された左ネジからなる雌ネジが螺合され、それらの螺合状態において、前記締付リング部12を介してボルト軸部11を締付方向に回転することにより、両側の接続スリーブを介して両側の鉄筋を締付リング部12側に引付けて固定することによって、それらの両側の鉄筋を連結することになる。なお、前記雄ネジ部11a,11bのネジ外径D は、多角口部14の平行面間の間隔Wより小さく形成される
【0009】
しかして、本実施例の中継ぎボルト10の形成に当っては、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、図の側面図及び図4のA−A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D 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。
【0010】
【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)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によって、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)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。
【図面の簡単な説明】
【図1】 本発明の一実施例を示した縦断面図である。
【図2】 同実施例の側面図である。
【図3】 ストッパ部形成後の状態を示した同側面図である。
【図4】 図3中のA−A拡大断面図である。
【符号の説明】
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
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing bar connecting intermediate bolt used for connecting ends of reinforcing bars.
[0002]
[Prior art]
Conventionally, as a connecting means of this type of reinforcing bar, one side of a connection sleeve made of a metal short pipe is fixed to the end of each deformed reinforcing bar to be connected by plastic deformation, and the other side of the connection sleeve In addition to forming female screws in a reverse screw relationship with each other, a male screw of a reverse screw that can be screwed to both of these female screws is formed on both sides, and a joint bolt that has a hexagonal tightening portion in the center is formed. A technical means is known in which both deformed reinforcing bars are connected by screwing and tightening the female screws of the connecting sleeves and the male screws of the connecting bolts in advance (Japanese Patent Publication No. 53-7732). ). In addition, by separating the intermediate bolt into a bolt shaft portion and a tightening ring portion and combining them so that they can move only in the direction of the bolt axis, the tightening ring portion is the end of both deformed bars during tightening. It is constructed so that it can move to the center part between each other and obtain a uniform tightening state, and further, it is constructed so that the bolt shaft part and the fastening ring part cannot be detached, while one member is lost or used Technical means for preventing the fastening ring portion from falling off are disclosed (Japanese Utility Model Publication No. 3-47050, Japanese Utility Model Publication No. 3-47051).
[0003]
[Problems to be solved by the invention]
By the way, in the former prior art, since the hexagonal tightening portion was formed integrally with the bolt shaft portion, after the end of one rebar abuts the end surface of the tightening portion during tightening, There was a drawback that it was not possible to tighten the other reinforcing bar without rotating the reinforcing bar itself. On the other hand, the latter prior art eliminates the above-described drawbacks by configuring the tightening ring portion to be movable in the bolt axis direction, but transmits the tightening rotational force applied to the tightening ring portion. Is configured to be performed via a pin-shaped member comprising a torque control shaft attached to the bolt shaft side, so that the transmission of the tightening rotational force is concentrated locally on the pin-shaped member portion. Therefore, especially when the fitting accuracy between the tightening ring part and the bolt shaft part is not good, the shaft center of the tightening ring part and the bolt shaft part is displaced by the tightening rotational force, and the contact part moves to one side. There has been a problem that it is liable to cause problems such as unevenness and a clogging phenomenon, and the smooth movement of the tightening ring portion being impaired.
[0004]
The present invention has been made to solve such problems of the prior art, wherein the transmission portion of the tightening rotational force is dispersed at a plurality of locations around the bolt shaft portion, and the tightening ring and the bolt shaft portion are provided. By increasing the contact area with the bolt, the transmission function of the rotational force to the bolt shaft and the moving function of the tightening ring are improved, thereby facilitating the ease and certainty of connecting the reinforcing bars, and then tightening. An object of the present invention is to provide a relay bolt having a wide range of application to the machining accuracy of the ring portion and the bolt shaft portion.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides male screw portions that are formed so as to be able to be screwed to respective female screw portions formed in a reverse screw relationship at the end portions of the respective reinforcing bars to be connected. And a bolt shaft portion in which a polygonal portion having an appropriate number of corners is formed at an intermediate portion of the male screw portions, a polygonal mouth portion that can be movably fitted to the polygonal portion, and A joint bolt is composed of a tightening ring portion having a tightening portion formed on the outer peripheral surface, and tightened via a relatively movable fitting between the polygonal portion of the bolt shaft portion and the polygonal mouth portion of the tightening ring. A stopper portion that is configured to be able to transmit an attached rotational force and that can be plastically deformed at the peripheral edge portions of both sides of the tightening ring to be engaged with both end surfaces of the polygonal portion of the bolt shaft portion. The polygonal part of the bolt shaft part is movably closed between the stoppers Characterized in that was.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
As the number of corners of the polygonal portion formed on the bolt shaft portion, an appropriate number of triangles or more can be applied. The number of corners of the polygonal mouth formed in the fastening ring is set to at least the same number of corners as that of the polygonal part because it is fitted to the polygonal part, for example, a corner that is a multiple of the polygonal part. The number can also be selected. Note that the polygonal portion of the bolt shaft portion and the polygonal mouth portion of the tightening ring do not necessarily have to be formed into a strict polygon, and engage with each corner portion to transmit the tightening rotational force. If it can be obtained, the shape of the flat portion between the corners can be slightly modified. In addition, as a tightening portion formed on the outer peripheral surface of the tightening ring, it is common to form a tightening portion by forming the outer shape of the tightening ring into an appropriate polygon such as a hexagon. The tightening form may be any.
[0007]
What is necessary is just to set the width | variety of the polygon part formed in the said bolt axial part and a fastening ring to a suitable dimension according to the case. In that case, it is important that the relative movement of the tightening ring with respect to the bolt shaft portion should not be restricted in the course of the tightening work performed via the tightening ring. In other words, it should not interfere with the joining between the end face on the reinforcing bar side and the both end faces of the fastening ring.
[0008]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of the present invention. In the figure, 10 is an illustration of the relay bolt in this embodiment, and a bolt shaft portion 11 and the clamping ring portion 12. On both sides of the bolt shaft portion 11, a male screw portion 11a made of a right screw and a male screw portion 11b made of a left screw are respectively formed, and a polygonal portion 13 made of a hexagon is formed at an intermediate portion thereof. The polygonal portion 13 is movably fitted into a hexagonal polygonal mouth portion 14 formed in the tightening ring portion 12 so that the tightening rotational force applied to the tightening ring portion 12 is increased. It is configured to transmit to the bolt shaft portion 11. In use, a female screw made of a right screw formed on a connection sleeve fixed to an end of one reinforcing bar is screwed to a male screw portion 11a made of one right screw, and the other screw A female screw made of a left screw formed on a connection sleeve fixed to the end of the other reinforcing bar is screwed into a male screw portion 11b made of a left screw, and in the screwed state, the tightening ring portion By rotating the bolt shaft portion 11 in the tightening direction via 12, the reinforcing bars on both sides are attracted and fixed to the tightening ring portion 12 side via the connection sleeves on both sides, thereby Will be linked. Incidentally, thread diameter D 1 of the said male threaded portion 11a, 11b is smaller than the distance W between the parallel surfaces of the polygonal opening 14.
[0009]
Thus, hitting the formation of reliever bolt 10 of the present embodiment, both sides of the male screw 11a of the bolt shaft portion 11, 11b is kept together preformed. In that case, the screw forming method of the male screws 11a and 11b is not necessarily limited to the rolling means. As shown in FIG. 1, after movably loosely fitted to the polygonal portion 13 of the tightening ring 12 polygonal opening 14 of the bolt shaft portion 11, the side view and the diagram of FIG 3 4 A- as shown in a enlarged cross-sectional view, 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 2, Stopper portions 15 and 16 are formed at the peripheral edge portions of both ends of the polygonal mouth portion 14 so as to project and deform inwardly so that the polygonal portion 13 can be locked. This embodiment, by the polygonal portion 13 confining it between their stopper portions 15 and 16 each other, so as to integrate both by preventing withdrawal from the bolt shaft portion 11 of the clamping ring section 12 It is composed. In the figure, reference numeral 17 denotes a recess formed by pressing.
[0010]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) As a result of distributing the tightening rotational force transmitting portion around the bolt shaft portion by the relatively movable fitting between the polygonal portion of the bolt shaft portion and the polygonal mouth portion of the tightening ring , the bolt shaft portion is Since it is rotated from a plurality of surrounding locations, it is possible to reliably transmit the rotational force around the bolt axis.
(2) Even if there is some backlash between the tightening ring part and the bolt shaft part, a rotational force is applied around the bolt axis line without causing a clogging phenomenon by biasing to one side as in the past. Therefore, a more reliable tightening action can be obtained. Therefore, the range of application for machining accuracy is widened.
(3) Since 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 is increased, a larger tightening force can be dealt with. In addition, since the contact area of the abutment portion is large, the movement of the tightening ring in the bolt axis direction is extremely smooth, and the adaptability to the machining accuracy is also expanded from this point.
(4) More shape configuration of the stopper portion by plastic deformation of the polygonal opening peripheral portion of the ring fastening, easily can be integrated with the bolt shank and the clamping ring section, whereas loss and coupling operation of the member The separation of both members at the time can be prevented.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention .
FIG. 2 is a side view of the same embodiment .
FIG. 3 is a side view showing a state after the stopper portion is formed .
4 is an AA enlarged cross-sectional view in FIG . 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Relay bolt, 11 ... Bolt shaft part, 12 ... Fastening ring part, 13 ... Polygon part, 14 ... Polygon mouth part, 15, 16 ... Stopper part, 17 ... Recessed part

Claims (1)

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し得るように構成するとともに、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たことを特徴とする鉄筋連結用中継ぎボルト。There are male screw parts formed on both sides that can be screwed to the female screw parts formed in a reverse screw relationship at the ends of the respective reinforcing bars to be connected, and the male screw parts A bolt shaft portion in which a polygonal portion having an appropriate number of corners is formed in an intermediate portion, a polygonal mouth portion that can be movably fitted to the polygonal portion, and a tightening portion formed on an outer peripheral surface And a tightening rotational force can be transmitted through a relatively movable fitting between the polygonal portion of the bolt shaft portion and the polygonal mouth portion of the tightening ring, and The peripheral edges of the polygonal mouths on both end faces of the fastening ring are plastically deformed to form stoppers that can be locked to the both end faces of the polygonal part of the bolt shaft part, and the polygonal parts of the bolt shaft part are Reinforcing bar connecting bolts that are movably confined between stoppers .
JP19831396A 1996-07-09 1996-07-09 Reinforcing bar connecting bolts Expired - Fee Related JP3763891B2 (en)

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Application Number Priority Date Filing Date Title
JP19831396A JP3763891B2 (en) 1996-07-09 1996-07-09 Reinforcing bar connecting bolts

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JPH1025857A JPH1025857A (en) 1998-01-27
JP3763891B2 true JP3763891B2 (en) 2006-04-05

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