JP2010150858A - Steel bar joining device - Google Patents

Steel bar joining device Download PDF

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JP2010150858A
JP2010150858A JP2008332174A JP2008332174A JP2010150858A JP 2010150858 A JP2010150858 A JP 2010150858A JP 2008332174 A JP2008332174 A JP 2008332174A JP 2008332174 A JP2008332174 A JP 2008332174A JP 2010150858 A JP2010150858 A JP 2010150858A
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joining
hole
wedge
steel bar
bolt
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JP5349948B2 (en
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Harukatsu Kadoya
治克 角屋
Satoshi Murayama
聡 村山
Mitsuhiro Yoshida
光博 吉田
Yoshitaka Kurihara
由貴 栗原
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Okabe Co Ltd
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Okabe Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel bar joining device providing stable joining performance with high quality without specially managing fastening torque. <P>SOLUTION: The steel bar joining device includes a joining hardware 2 formed with through-holes 3 through which two steel bars P penetrate in a parallel state with a clearance G; first and second through-holes 4, 5 formed penetrating the joining hardware in the direction orthogonal to the penetrating direction of the steel bars toward the clearance between the steel bars; a nut 6 provided at the joining hardware to coincide with the through-holes; a joining fastening body 8 mounted to the joining hardware through the through-holes, with one end formed with a bolt 9 fastened to the nut and with the other end formed with a wedge 10 pulled into a clearance between the steel bars by the fastening action of the bolt and nut to restrict the steel bars between itself and the joining hardware; and a torque input part 11 formed at a part other than the wedge of the joining fastening body and broken by a set fastening torque. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、締結トルクを別途管理することなく、高い品質で安定した接合性能を得ることが可能な棒鋼接合装置に関する。   The present invention relates to a steel bar joining apparatus capable of obtaining high quality and stable joining performance without separately managing fastening torque.

断面長円状のスリーブと楔部材からなり、スリーブ内に２本の棒鋼をそれぞれ逆方向から挿入して、スリーブに形成された楔挿通孔から２本の棒鋼間に楔部材を打ち込むことで、棒鋼同士を機械的に接合するようにした継手具が知られている。   It consists of a sleeve having an oval cross section and a wedge member, by inserting two steel bars into the sleeve from opposite directions, and driving the wedge member between the two steel bars through a wedge insertion hole formed in the sleeve, There is known a joint tool that mechanically joins steel bars.

特許文献１は、ボルトを、スリーブに設けたナットにねじ込むことで、楔部材を棒鋼間に係合させて棒鋼同士を接合する継手具である。   Patent Document 1 is a joint tool that joins steel bars by engaging a wedge member between steel bars by screwing a bolt into a nut provided on a sleeve.

特許文献２〜４は、楔部材の一端部に形成したボルトを、スリーブに設けたナットによりねじ上げることで、楔部材を棒鋼間に係合させて棒鋼同士を接合する継手である。
実公平０７−００５１５６号公報 実公昭５６−０１９６１７号公報 実開平０１−０７８７１１号公報 特許第３９７２１３４号公報 Patent Documents 2 to 4 are joints that join a steel bar by engaging a wedge member between steel bars by screwing up a bolt formed at one end of the wedge member with a nut provided on a sleeve.
No. 07-005156 Japanese Utility Model Publication No. 56-019617 Japanese Utility Model Publication No. 01-078711 Japanese Patent No. 3972134

これら継手具はいずれも、ボルトをナットに締結していくことで、楔部材を棒鋼に係合させる機構であるため、作業者に応じてねじ込み量やねじ上げ量に差が生じ、係合力にバラツキが生じる問題があった。確実に所定の継手性能を得るには、別途トルク管理が必要になり、従ってこれら継手具は施工に手間がかかるという課題があった。   Each of these fittings is a mechanism that engages the wedge member with the steel bar by fastening the bolt to the nut, so that there is a difference in the screwing amount and the screwing amount depending on the operator, and the engagement force is reduced. There was a problem of variation. In order to reliably obtain a predetermined joint performance, it is necessary to separately manage the torque, and therefore, there has been a problem that these joint tools require time and labor for construction.

特許文献１では、更に前記締付けボルトの締付け頭部を強く締付けることによって、ねじ杆の下端面が楔材の頂面に圧着し、楔材を時計方向に反転せしめ、それ以上の楔材の回転ができない位置まで締付け頭部を締付けると、遂には小径の軸部が切断され……（第３頁第６欄第１９〜２４行参照）と記載されている。   In Patent Document 1, by further tightening the tightening head of the tightening bolt, the lower end surface of the screw rod is pressed against the top surface of the wedge material, the wedge material is inverted clockwise, and the wedge material is rotated further. When the tightening head is tightened to a position where it is not possible, the small diameter shaft portion is finally cut (see page 3, column 6, lines 19 to 24).

しかしながら、この接合具は、楔材の大きさがボルト受け金具に形成されたねじ孔の径以上にはできないことから、接合する棒鋼同士の間隔次第では、楔材と棒鋼が確実に係合していない、即ち、所定の接合性能が得られていない不完全な状態で接合され、さらには、楔材が戻ってしまう可能性もあることから、接合管理という面においては安定性に欠けるものであった。   However, since the size of the wedge material cannot be larger than the diameter of the screw hole formed in the bolt receiving bracket, the wedge material and the steel bar are surely engaged with each other depending on the interval between the steel bars to be joined. In other words, there is a possibility that the joint material is joined in an incomplete state where the predetermined joining performance is not obtained, and further, the wedge material may be returned. there were.

本発明は上記従来の課題に鑑みて創案されたものであって、締結トルクを別途管理することなく、高い品質で安定した接合性能を得ることが可能な棒鋼接合装置を提供することを目的とする。   The present invention was devised in view of the above-described conventional problems, and an object thereof is to provide a steel bar joining apparatus capable of obtaining high quality and stable joining performance without separately managing fastening torque. To do.

本発明にかかる棒鋼接合装置は、２本の棒鋼が隙間を空けた並列状態で貫通される貫通穴が形成された接合用金物と、該接合用金物に、棒鋼間の隙間へ向かって棒鋼の貫通方向と直交する方向に貫通形成された通孔と、上記接合用金物に、上記通孔に合致させて設けられるナットと、該ナットに締結されるボルトが一端に形成され、他端に、ボルト・ナットの締結作用で棒鋼の隙間に引き込まれて当該棒鋼を上記接合用金物との間で拘束する楔が形成され、上記通孔を介して該接合用金物に装着される接合用締結体と、該接合用締結体の上記楔以外の箇所に形成され、設定した締結トルクで破断される破断部とを備えたことを特徴とする。   A steel bar joining apparatus according to the present invention includes a joining hardware in which a through hole through which two steel bars are penetrated in a parallel state with a gap formed therein, and the joining hardware to the gap between the steel bars. A through hole formed in a direction orthogonal to the through direction, a nut provided to match the through hole in the bonding hardware, and a bolt fastened to the nut are formed at one end, and at the other end, Fastening body for joining which is pulled into the gap between the steel bars by the fastening action of bolts and nuts and a wedge is formed to restrain the steel bar between the joining hardware and is attached to the joining hardware through the through hole And a breaking portion that is formed at a place other than the wedge of the fastening body for joining and is broken at a set fastening torque.

前記破断部が、前記ボルトに形成されるトルク入力部であることを特徴とする。   The breaking portion is a torque input portion formed on the bolt.

前記破断部が、前記楔と前記ボルトとの間に形成される薄肉部であることを特徴とする。   The rupture part is a thin part formed between the wedge and the bolt.

本発明にかかる棒鋼接合装置にあっては、締結トルクを別途管理することなく、高い品質で安定した接合性能で棒鋼を接合することができる。   In the steel bar joining apparatus according to the present invention, steel bars can be joined with high quality and stable joining performance without separately managing the fastening torque.

以下に、本発明にかかる棒鋼接合装置の好適な実施形態を、添付図面を参照して詳細に説明する。図１は、第一実施形態にかかる棒鋼接合装置の正面断面であって、その使用状態の説明図である。図２は、図１の棒鋼接合装置に適用される接合用締結体の説明図であって、（ａ）は側面図、（ｂ）は（ａ）のＸ−Ｘ線矢視図である。   DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a steel bar joining apparatus according to the present invention will be described in detail with reference to the accompanying drawings. Drawing 1 is a front section of the steel bar joining device concerning a first embodiment, and is an explanatory view of the use condition. FIGS. 2A and 2B are explanatory views of a joining fastener applied to the steel bar joining apparatus of FIG. 1, where FIG. 2A is a side view and FIG. 2B is a view taken along line XX in FIG.

棒鋼接合装置１の接合用金物２は、２本の棒鋼Ｐを接続して長さを延長するものであって、長円状の貫通穴３が形成されたスリーブ状に形成される。接合用金物２は、金属製で、例えば、熱処理により硬度を高めた鋼材や、鋳鉄などで形成される。貫通穴３は、短径が棒鋼Ｐの外径よりも僅かに大きく、長径が、２本の棒鋼Ｐを横並びで隙間Ｇを空けた並列状態で貫通させ得る寸法で形成される。   The joining hardware 2 of the steel bar joining apparatus 1 is a sleeve-like shape in which two steel bars P are connected to extend the length, and an oval through hole 3 is formed. The bonding hardware 2 is made of metal, and is formed of, for example, a steel material whose hardness is increased by heat treatment, cast iron, or the like. The through hole 3 is formed with a dimension that allows the short diameter to be slightly larger than the outer diameter of the steel bar P and allows the long diameter to pass through the two steel bars P side by side in a parallel state with a gap G therebetween.

接合用金物２には、挿入される棒鋼Ｐ間の隙間Ｇへ向かって、棒鋼Ｐの貫通方向、すなわち貫通穴３と直交する方向（短径方向）に通孔４，５が貫通形成される。図示では、接合用金物２の上壁２ａ上面および下壁２ｂ下面が平坦に形成され、通孔４，５は、接合用金物２の上壁２ａを貫通する第１通孔４と、下壁２ｂを貫通する第２通孔５から構成される。第１通孔４と第２通孔５は、貫通される棒鋼Ｐ間の隙間Ｇを介して互いに一連に連通される。   Through holes 4 and 5 are formed in the joining hardware 2 in the direction of penetration of the steel bar P, that is, in the direction perpendicular to the through hole 3 (the minor axis direction), toward the gap G between the steel bars P to be inserted. . In the drawing, the upper surface 2a of the bonding hardware 2 and the lower surface of the lower wall 2b are formed flat, and the through holes 4 and 5 have a first through hole 4 penetrating the upper wall 2a of the bonding hardware 2 and the lower wall. It is comprised from the 2nd through-hole 5 which penetrates 2b. The 1st through-hole 4 and the 2nd through-hole 5 are mutually connected in series via the clearance gap G between the steel bars P penetrated.

接合用金物２の上壁２ａ上面には、第１通孔４に合致させてナット６が設けられる。図示例にあっては、ナット６はワッシャ７を介して接合用金物２の上壁２ａ上に設置される。ワッシャ７に代えて、ナット６に一体的な取付座を形成してもよい。これにより、第１通孔４とナット６のねじ穴が一連に連通される。   A nut 6 is provided on the upper surface of the upper wall 2 a of the bonding hardware 2 so as to match the first through hole 4. In the illustrated example, the nut 6 is installed on the upper wall 2 a of the bonding hardware 2 via the washer 7. Instead of the washer 7, a mounting seat integral with the nut 6 may be formed. Thereby, the 1st through-hole 4 and the screw hole of the nut 6 are connected in series.

接合用金物２には、第２通孔５から第１通孔４へ向かって挿入して、接合用締結体８が装着される。接合用締結体８は金属製で、図２にも示すように、上部にボルト９が形成され、下部に楔１０が形成される。   A joining fastening body 8 is attached to the joining hardware 2 by being inserted from the second through hole 5 toward the first through hole 4. The fastening body 8 for joining is made of metal, and as shown in FIG. 2, a bolt 9 is formed at the upper part and a wedge 10 is formed at the lower part.

楔１０は、正面から見て、上方から下方に向かって末広がりに幅Ｗが広がる傾斜面１０ａで形成され、側面から見ると、上方から下方にわたってほぼ等しい厚さＴで形成される。第１通孔４は、ボルト９が通る円形状とする一方で、第２通孔５については、円形状でもよいが、楔１０の外形輪郭に合わせて、貫通穴３の向きに短径であって、貫通穴３と直交する左右方向に長径の長円形状に形成してもよい。   The wedge 10 is formed of an inclined surface 10a having a width W widening from the top to the bottom when viewed from the front, and is formed with a substantially equal thickness T from the top to the bottom when viewed from the side. The first through hole 4 has a circular shape through which the bolt 9 passes, while the second through hole 5 may have a circular shape. However, the first through hole 4 has a short diameter in the direction of the through hole 3 in accordance with the outer contour of the wedge 10. In addition, it may be formed in an oval shape having a long diameter in the left-right direction orthogonal to the through hole 3.

接合用締結体８は、図示にあっては、ボルト９を上にして、第２通孔５から接合用金物２内に挿入され、当該ボルト９が第１通孔４を介して、その上のナット６に螺合される。ボルト９がナット６に螺合されて行くにつれ、接合用締結体８は、ボルト・ナットの締結作用で上方に引き上げられ、これにより楔１０が第２通孔５から貫通穴３内方に進入していく。   In the figure, the fastening body 8 for joining is inserted into the joining hardware 2 from the second through hole 5 with the bolt 9 facing upward, and the bolt 9 is inserted above the first through hole 4 via the first through hole 4. The nut 6 is screwed. As the bolt 9 is screwed onto the nut 6, the joint fastening body 8 is pulled upward by the fastening action of the bolt and nut, whereby the wedge 10 enters the through hole 3 from the second through hole 5. I will do it.

貫通穴３内に２本の棒鋼Ｐが貫通しているときには、ボルト・ナットの締結作用で上方に引き上げられる楔１０は、棒鋼Ｐ間の隙間Ｇに引き込まれつつ、各棒鋼Ｐに側方から圧接する。楔１０は、これら棒鋼Ｐをそれぞれ、貫通穴３の長径方向に向かって左右に押圧するので、棒鋼Ｐは楔１０と接合用金物２との間で拘束される。   When the two steel bars P pass through the through holes 3, the wedges 10 that are pulled upward by the fastening action of the bolts and nuts are drawn into the gaps G between the steel bars P, and from each side to the steel bars P. Press contact. Since the wedge 10 presses these bar steels P to the left and right in the major axis direction of the through-hole 3, the bar steel P is restrained between the wedge 10 and the joining hardware 2.

楔１０の傾斜面１０ａには、楔１０の厚さＴ方向に適宜間隔で突起１０ｂが形成されている。突起１０ｂは、楔１０が棒鋼Ｐに圧接するに伴って、その棒鋼Ｐに食い込むようになっている。   On the inclined surface 10 a of the wedge 10, protrusions 10 b are formed at appropriate intervals in the thickness T direction of the wedge 10. The protrusion 10b bites into the steel bar P as the wedge 10 presses against the steel bar P.

接合用締結体８には、ボルト９とナット６を締結する締結トルクが設定した締結トルクに達すると破断される破断部が形成される。破断部は、接合用締結体８全体において、楔１０以外の箇所に形成される。   The joining fastening body 8 is formed with a breaking portion that is broken when the fastening torque for fastening the bolt 9 and the nut 6 reaches the set fastening torque. The fracture portion is formed at a place other than the wedge 10 in the entire fastening body 8 for bonding.

第一実施形態にあっては、破断部は、ボルト９の上部に形成され、ボルト９に締め付けトルクを入力する締め付け工具（図示せず）が装着されるトルク入力部１１で構成される。トルク入力部１１は、接合用締結体８全体で、最小のトルクで破断される部位として設定される。トルク入力部１１は、締め付け工具が嵌め合わされる一般周知の形状で形成される。   In the first embodiment, the fracture portion is formed by a torque input portion 11 that is formed on the upper portion of the bolt 9 and on which a tightening tool (not shown) for inputting a tightening torque to the bolt 9 is mounted. The torque input part 11 is set as a part to be broken with the minimum torque in the entire fastening body 8 for joining. The torque input unit 11 is formed in a generally known shape to which a tightening tool is fitted.

第一実施形態にかかる棒鋼接合装置１の作用について説明すると、第２通孔５から挿入した接合用締結体８のボルト９を第１通孔４から突出させ、この突出したボルト９に、ワッシャ７を介して、ナット６を螺合させ、ナット６が接合用金物２の上壁２ａ上に緩く当接するまでねじ込む。この際、楔１０の厚さＴ方向を貫通穴３の向きに合わせ、楔１０の幅方向Ｗを貫通穴３の長径方向、すなわち棒鋼Ｐが並ぶ方向に合わせる。ボルト９にナット６を緩く螺合させたら、次に、図１（ａ）に示すように、接合用金物２の貫通穴３に、両側から２本の棒鋼Ｐを貫通させる。棒鋼Ｐはそれぞれ、貫通穴３から適宜長さ突出するように挿入する。   The operation of the steel bar joining apparatus 1 according to the first embodiment will be described. The bolt 9 of the fastening body 8 for joining inserted from the second through hole 5 is projected from the first through hole 4, and the washer 9 7, the nut 6 is screwed and screwed in until the nut 6 loosely contacts the upper wall 2 a of the joining hardware 2. At this time, the thickness T direction of the wedge 10 is aligned with the direction of the through hole 3, and the width direction W of the wedge 10 is aligned with the major axis direction of the through hole 3, that is, the direction in which the steel bars P are arranged. After the nut 6 is loosely screwed into the bolt 9, next, two steel bars P are passed through the through hole 3 of the joining hardware 2 from both sides as shown in FIG. Each of the steel bars P is inserted so as to appropriately protrude from the through hole 3.

その後、更にボルト９をナット６に螺合させていき、楔１０を第２通孔５から貫通穴３内方へ引き上げていく。ボルト・ナットの締結作用で引き上げられる楔１０は図１（ｂ）に示すように、棒鋼Ｐの間に引き込まれる。   Thereafter, the bolt 9 is further screwed into the nut 6, and the wedge 10 is pulled up from the second through hole 5 to the inside of the through hole 3. The wedge 10 pulled up by the fastening action of the bolts and nuts is drawn between the steel bars P as shown in FIG.

次いで、トルク入力部１１に締め付け工具を装着し、ボルト９をナット６に強く締結していく。この締結操作によってさらに引き上げられて棒鋼Ｐ間の隙間Ｇに引き込まれた楔１０は、貫通穴３内で並列状態にある２本の棒鋼Ｐの当該隙間Ｇを左右に押し広げるように棒鋼Ｐを押圧し、これにより各棒鋼Ｐは、楔１０と係合しつつ、これら楔１０と接合用金物２との間で拘束されていく。またこの過程で、ナット６も接合用金物２にしっかりと定着されていく。   Next, a tightening tool is attached to the torque input unit 11, and the bolt 9 is strongly tightened to the nut 6. The wedge 10 that is further pulled up by this fastening operation and drawn into the gap G between the steel bars P extends the steel bar P so as to push the gap G between the two steel bars P in parallel in the through hole 3 to the left and right. Thus, the steel bars P are restrained between the wedges 10 and the joining hardware 2 while being engaged with the wedges 10. In this process, the nut 6 is also firmly fixed to the joining hardware 2.

この際、第２通孔５の内径を、ボルト９の径や第１通孔４に左右されることなく任意に大きく設定できるので、楔１０の幅寸法Ｗも大きく設定することができ、棒鋼Ｐに適切に係合させることができる。例えば棒鋼が異形鉄筋の場合、当該異形鉄筋は、鉄筋径、節やリブの高さにバラツキがある。断面寸法についても、上下寸法と左右寸法が相違する。従って、異形鉄筋の場合、挿入した向きによって、楔を適切に係合させることができないおそれがある。具体的には、寸法のバラツキで２本の異形鉄筋の間隔が広くなっている状態では、楔の係合が緩くなってしまうおそれがある。これに対し、第一実施形態にあっては、楔１０の幅寸法Ｗを大きく形成できて、緩みのない適切な係合を確保することができる。   At this time, the inner diameter of the second through-hole 5 can be set arbitrarily large without being influenced by the diameter of the bolt 9 or the first through-hole 4, so that the width dimension W of the wedge 10 can also be set large. P can be appropriately engaged. For example, when the steel bar is a deformed reinforcing bar, the deformed reinforcing bar varies in the diameter of the reinforcing bar and the height of the nodes and ribs. As for the cross-sectional dimensions, the vertical and horizontal dimensions are different. Therefore, in the case of a deformed reinforcing bar, the wedge may not be properly engaged depending on the inserted direction. Specifically, when the distance between the two deformed reinforcing bars is wide due to variation in dimensions, the engagement of the wedge may be loosened. On the other hand, in the first embodiment, the width dimension W of the wedge 10 can be formed large, and appropriate engagement without loosening can be ensured.

その後、更に締め付け工具でボルト９をナット６に螺合させていき、接合強度を高めていく。そして、締め付け工具による締め付け力が、トルク入力部１１が破断するように設定した設定トルクに達すると、図１（ｃ）に示すように、トルク入力部１１が破断し、接合作業が完了する。これにより、楔１０と棒鋼Ｐとが適切に係合した状態で、楔１０と接合用金物２との間で当該棒鋼Ｐを拘束して接合することができる。   Thereafter, the bolt 9 is further screwed into the nut 6 with a tightening tool to increase the joining strength. When the tightening force by the tightening tool reaches the set torque set so that the torque input unit 11 is broken, the torque input unit 11 is broken as shown in FIG. 1C, and the joining operation is completed. Thereby, in the state which the wedge 10 and the steel bar P were engaged appropriately, the said steel bar P can be restrained and joined between the wedge 10 and the metal fitting 2 for joining.

第一実施形態にあっては、トルク入力部１１の破断によって接合完了を確認することができ、締結トルクを別途管理することなく、高い品質で安定した接合性能を得ることができる。   In the first embodiment, it is possible to confirm the completion of joining by rupturing the torque input unit 11, and it is possible to obtain high quality and stable joining performance without separately managing the fastening torque.

また、第一実施形態では、ボルト９がナット６に締結する一方で、楔１０が棒鋼Ｐと係合していて、楔１０とボルト９との間にテンションを生じさせることができ、棒鋼Ｐの接合状態を安定的に保持することができる。   In the first embodiment, while the bolt 9 is fastened to the nut 6, the wedge 10 is engaged with the steel bar P, and a tension can be generated between the wedge 10 and the bolt 9. Can be stably maintained.

図３および図４には、本発明にかかる棒鋼接合装置の第二実施形態が示されている。図３は、第二実施形態にかかる棒鋼接合装置の正面断面であって、その使用状態の説明図である。図４は、図３の棒鋼接合装置に適用される接合用締結体の正面図である。第一実施形態と同様の構成については、同じ符号を付して、説明を省略する。   3 and 4 show a second embodiment of the steel bar joining apparatus according to the present invention. FIG. 3 is a front cross-sectional view of the steel bar joining apparatus according to the second embodiment, and is an explanatory view of the usage state. FIG. 4 is a front view of a joining fastener applied to the steel bar joining apparatus of FIG. About the structure similar to 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

ナット６には、第１通孔４に面する下端部に、ねじ穴よりも大きな内径の孔６ａが形成されている。接合用締結体８については、破断部として、第一実施形態のトルク入力部に代えて、楔１０とボルト９との間に、平坦な平板状の薄肉部１２が形成される。この薄肉部１２は、接合用締結体８全体で、最小のトルクで破断される部位として設定される。   In the nut 6, a hole 6 a having an inner diameter larger than that of the screw hole is formed at the lower end portion facing the first through hole 4. About the joint fastening body 8, instead of the torque input part of the first embodiment, a flat flat thin part 12 is formed between the wedge 10 and the bolt 9 as a fracture part. The thin portion 12 is set as a portion to be broken with a minimum torque in the entire fastening body 8 for bonding.

第二実施形態にかかる棒鋼接合装置１の作用について説明すると、接合用金物２の上壁２ａ上に、第１通孔４に合わせて、ナット６を当接し、第２通孔５から接合用締結体８のボルト９を挿入する。この際、第一実施形態と同様に、楔１０の厚さＴ方向を貫通穴３の向きに合わせ、末広がりに広がる幅方向Ｗを貫通穴３と直交する向きとする。第１通孔４から突出するボルト９に、ナット６を緩く螺合させたら、図３（ａ）および（ｂ）に示すように、接合用金物２の貫通穴３に、両側から棒鋼Ｐを貫通させる。   The operation of the steel bar joining apparatus 1 according to the second embodiment will be described. The nut 6 is brought into contact with the upper wall 2a of the metal fitting 2 for joining in accordance with the first through hole 4 and is joined from the second through hole 5 for joining. The bolt 9 of the fastening body 8 is inserted. At this time, as in the first embodiment, the thickness T direction of the wedge 10 is aligned with the direction of the through hole 3, and the width direction W that spreads toward the end is the direction orthogonal to the through hole 3. When the nut 6 is loosely screwed into the bolt 9 protruding from the first through hole 4, as shown in FIGS. 3 (a) and 3 (b), the steel bar P is inserted into the through hole 3 of the bonding hardware 2 from both sides. To penetrate.

その後、ナット６をボルト９に螺合させていき、楔１０を第２通孔５から貫通穴３内方へ引き上げていく。ボルト・ナットの締結作用で引き上げられる楔１０は図３（ｃ）に示すように、棒鋼Ｐの間に引き込まれる。   Thereafter, the nut 6 is screwed into the bolt 9 and the wedge 10 is pulled up from the second through hole 5 into the through hole 3. The wedge 10 pulled up by the fastening action of the bolt and nut is pulled in between the steel bars P as shown in FIG.

次いで、ナット６にこれを締め付ける締め付け工具（図示せず）を装着し、ナット６をボルト９に強く締結していく。この締結操作によってさらに引き上げられて棒鋼Ｐ間の隙間Ｇに引き込まれた楔１０は、棒鋼Ｐに係合しつつ、接合用金物２との間で棒鋼Ｐを拘束していく。またこの過程で、ナット６も接合用金物２にしっかりと定着されていく。   Next, a tightening tool (not shown) for tightening the nut 6 is attached to the nut 6, and the nut 6 is strongly tightened to the bolt 9. The wedge 10 further pulled up by this fastening operation and drawn into the gap G between the steel bars P engages with the steel bars P and restrains the steel bars P with the joining hardware 2. In this process, the nut 6 is also firmly fixed to the joining hardware 2.

その後、更に締め付け工具でナット６をボルト９に螺合させていき、接合強度を高めていく。そして、締め付け工具による締め付け力が、薄肉部１２が破断するように設定した設定トルクに達すると、図３（ｄ）に示すように、薄肉部１２が破断し、接合作業が完了する。これにより、楔１０と棒鋼Ｐとが適切に係合した状態で、楔１０と接合用金物２との間で当該棒鋼Ｐを拘束して接合することができる。   Thereafter, the nut 6 is further screwed into the bolt 9 with a tightening tool to increase the joining strength. When the tightening force of the tightening tool reaches a set torque set so that the thin portion 12 is broken, the thin portion 12 is broken as shown in FIG. 3D, and the joining operation is completed. Thereby, in the state which the wedge 10 and the steel bar P were engaged appropriately, the said steel bar P can be restrained and joined between the wedge 10 and the metal fitting 2 for joining.

第二実施形態にあっては、薄肉部１２が破断して、ボルト９およびナット６が接合用金物２および接合用締結体８から分離することによって、接合完了を確認することができ、締結トルクを別途管理することなく、高い品質で安定した接合性能を得ることができる。   In the second embodiment, when the thin portion 12 is broken and the bolt 9 and the nut 6 are separated from the metal fitting 2 and the fastening body 8 for joining, it is possible to confirm the completion of joining, and the fastening torque. It is possible to obtain high quality and stable joining performance without separately managing.

また、第二実施形態では、破断部となる薄肉部１２を楔１０とボルト９の間に形成したので、ボルト９およびナット６を接合用金物２から分離させることができ、接合用金物２回りの突起物を殆どなくすことができる。従って、棒鋼接合装置１をコンクリート中に埋設する際に、被り厚が厚くなることを防止することができる。また、破断個所となる薄肉部１２の断面寸法は、ボルト９の外径や第１通孔４の内径よりももちろん小さいので、当該第１通孔４や第２通孔５を介して接合用金物２内部にモルタル分等が入り込む余地があり、埋設した場合の継手強度の向上を期待することができる。   Further, in the second embodiment, since the thin portion 12 serving as the fracture portion is formed between the wedge 10 and the bolt 9, the bolt 9 and the nut 6 can be separated from the joining hardware 2, Most of the protrusions can be eliminated. Therefore, when the steel bar joining apparatus 1 is embedded in concrete, it is possible to prevent the covering thickness from increasing. Moreover, since the cross-sectional dimension of the thin part 12 used as a fracture | rupture part is smaller than the outer diameter of the volt | bolt 9, and the internal diameter of the 1st through-hole 4, it is for joining via the said 1st through-hole 4 or the 2nd through-hole 5. There is room for the mortar or the like to enter inside the hardware 2, and an improvement in joint strength when buried can be expected.

上記実施形態にあっては、棒鋼Ｐと称して説明したが、棒鋼Ｐとしては、異形鉄筋や全ネジボルト、セパレータ等に使用される丸鋼などであってもよく、また適用用途としても、主筋やせん断補強筋、スラブ筋などの構造用棒鋼の接続や仮設用棒鋼の接続など、特に限定されることはない。   In the above embodiment, the steel bar P has been described. However, the steel bar P may be a deformed reinforcing bar, a round screw used for a whole screw bolt, a separator, or the like. There is no particular limitation, such as connection of structural steel bars such as reinforcing bars, shear reinforcement bars, and slab bars, and connection of temporary steel bars.

また、本実施形態にかかる棒鋼接合装置１を２つ用い、これら２つの接合装置１を添え筋の両端に取り付けるとともに、各接合装置１に、添え筋の相手としてそれぞれ棒鋼を取り付ける形態で、添え筋を介して棒鋼を接合する使用法にも適用することができる。   In addition, two steel bar joining devices 1 according to the present embodiment are used, and these two joining devices 1 are attached to both ends of the supplementary bar, and a bar steel is attached to each joining device 1 as a counterpart of the supplementary bar. It is applicable also to the usage which joins steel bar via a reinforcement.

接合する棒鋼Ｐが丸鋼の場合には、貫通穴３内面に凹凸などの粗面を形成し、異形の場合には、貫通穴３の内面を平滑にすることが好ましく、これにより継手性能を向上することができる。   When the steel bar P to be joined is a round steel, it is preferable to form a rough surface such as irregularities on the inner surface of the through hole 3, and to smooth the inner surface of the through hole 3 in the case of irregular shapes, thereby improving the joint performance. Can be improved.

接合用締結体８の楔１０とボルト９は、直結して形成してもよいが、棒鋼Ｐの貫通穴３への挿入操作性を考慮して、貫通穴３の長径方向に沿う外形寸法を、ボルト９と楔１０の間で狭く形成することが好ましい。   The wedge 10 and the bolt 9 of the fastening body 8 for joining may be formed by direct connection, but considering the operability of inserting the steel bar P into the through hole 3, the outer dimension along the major axis direction of the through hole 3 is set. It is preferable to form a narrow space between the bolt 9 and the wedge 10.

本発明にかかる棒鋼接合装置の第一実施形態を説明する説明図である。It is explanatory drawing explaining 1st embodiment of the steel bar joining apparatus concerning this invention. 図１の棒鋼接合装置に適用される接合用締結体を説明する説明図である。It is explanatory drawing explaining the fastening body for joining applied to the steel bar joining apparatus of FIG. 本発明にかかる棒鋼接合装置の第二実施形態を説明する説明図である。It is explanatory drawing explaining 2nd embodiment of the steel bar joining apparatus concerning this invention. 図３の棒鋼接合装置に適用される接合用締結体を示す正面図である。It is a front view which shows the fastening body for joining applied to the steel bar joining apparatus of FIG.

符号の説明Explanation of symbols

１ 棒鋼接合装置
２ 接合用金物
３ 貫通穴
４ 第１通孔
５ 第２通孔
６ ナット
８ 接合用締結体
９ ボルト
１０ 楔
１１ トルク入力部
１２ 薄肉部
Ｇ 隙間
Ｐ 棒鋼 DESCRIPTION OF SYMBOLS 1 Bar steel joining apparatus 2 Metal fitting for joining 3 Through hole 4 1st through-hole 5 2nd through-hole 6 Nut 8 Fastening body for joining 9 Bolt 10 Wedge 11 Torque input part 12 Thin part G Gap P Steel bar

Claims (3)

２本の棒鋼が隙間を空けた並列状態で貫通される貫通穴が形成された接合用金物と、該接合用金物に、棒鋼間の隙間へ向かって棒鋼の貫通方向と直交する方向に貫通形成された通孔と、上記接合用金物に、上記通孔に合致させて設けられるナットと、該ナットに締結されるボルトが一端に形成され、他端に、ボルト・ナットの締結作用で棒鋼の隙間に引き込まれて当該棒鋼を上記接合用金物との間で拘束する楔が形成され、上記通孔を介して該接合用金物に装着される接合用締結体と、該接合用締結体の上記楔以外の箇所に形成され、設定した締結トルクで破断される破断部とを備えたことを特徴とする棒鋼接合装置。   A metal fitting for joining in which a through hole is formed in which two steel bars are penetrated in a parallel state with a gap between them, and the metal fitting for penetration is formed in a direction perpendicular to the penetration direction of the steel bar toward the gap between the steel bars And a nut provided to match the through hole, and a bolt fastened to the nut are formed at one end, and the other end of the steel bar is fastened by a bolt / nut fastening action. A wedge is formed that is drawn into the gap and restrains the steel bar with the bonding hardware, and is connected to the bonding hardware via the through hole, and the bonding fastener is A steel bar joining apparatus comprising: a breaking portion formed at a place other than the wedge and broken at a set fastening torque. 前記破断部が、前記ボルトに形成されるトルク入力部であることを特徴とする請求項１に記載の棒鋼接合装置。   The steel bar joining apparatus according to claim 1, wherein the fracture portion is a torque input portion formed on the bolt. 前記破断部が、前記楔と前記ボルトとの間に形成される薄肉部であることを特徴とする請求項１に記載の棒鋼接合装置。   The steel bar joining apparatus according to claim 1, wherein the fracture portion is a thin portion formed between the wedge and the bolt.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014055448A (en) * 2012-09-12 2014-03-27 Ihi Infrastructure Systems Co Ltd Method and device for connecting reinforcing bars
CN105089206A (en) * 2015-08-02 2015-11-25 长安大学 Steel bar connecting device for precast concrete component and steel bar connecting method for precast concrete component
CN106988487A (en) * 2016-01-20 2017-07-28 上海标仕建筑工程材料有限公司 Half grouting formula steel bar connector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5619617Y2 (en) * 1976-12-16 1981-05-11
JPS63193109U (en) * 1987-05-31 1988-12-13
JPH11223017A (en) * 1998-02-10 1999-08-17 Okabe Co Ltd Round bar jointing and fixing device
JP2001248623A (en) * 2000-03-03 2001-09-14 Mitsubishi Motors Corp Bolt tightening structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5619617Y2 (en) * 1976-12-16 1981-05-11
JPS63193109U (en) * 1987-05-31 1988-12-13
JPH11223017A (en) * 1998-02-10 1999-08-17 Okabe Co Ltd Round bar jointing and fixing device
JP2001248623A (en) * 2000-03-03 2001-09-14 Mitsubishi Motors Corp Bolt tightening structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014055448A (en) * 2012-09-12 2014-03-27 Ihi Infrastructure Systems Co Ltd Method and device for connecting reinforcing bars
CN105089206A (en) * 2015-08-02 2015-11-25 长安大学 Steel bar connecting device for precast concrete component and steel bar connecting method for precast concrete component
CN106988487A (en) * 2016-01-20 2017-07-28 上海标仕建筑工程材料有限公司 Half grouting formula steel bar connector

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