JP2012031660A - Connection structure of reinforcing bar and connection method of reinforcing bar - Google Patents

Connection structure of reinforcing bar and connection method of reinforcing bar Download PDF

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JP2012031660A
JP2012031660A JP2010172883A JP2010172883A JP2012031660A JP 2012031660 A JP2012031660 A JP 2012031660A JP 2010172883 A JP2010172883 A JP 2010172883A JP 2010172883 A JP2010172883 A JP 2010172883A JP 2012031660 A JP2012031660 A JP 2012031660A
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reinforcing bar
fitting
reinforcing
rebar
outer peripheral
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JP5567930B2 (en
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Fujio Yamazaki
富士夫 山崎
Norio Matsubara
則夫 松原
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Fuji Bolt Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of reinforcing bars and a connection method of reinforcing bars, in which reinforcing bars are connected by simple work and also connected such that displacement is hardly caused.SOLUTION: A connecting fitting 3 is made of a formed metal plate and connects reinforcing bars 1, 2 having a substantially circular cross-section which are overlapped and crossed each other approximately in a cross shape. The connecting fitting 3 has a fitting groove 31A formed on an inner side of a clamp part 31 of an inverted U-shape in cross section arcuately bent along the outer peripheral surface of the reinforcing bar 1 and a pair of claw parts 34 each formed by folding back each end of the extension parts extending from both ends of the clamp part 31. The reinforcing bars 1, 2 are firmly caught by the clamp part 31 and the claw parts 34 of the connecting fitting 3 at an intersection part thereof, the reinforcing bar 1 is fitted in the fitting groove 31A, and the pair of claw parts 34 of the connecting fitting 3 are caulked to the outer periphery of the reinforcing bar 2, thereby connecting the reinforcing bars 1, 2.

Description

本発明は、鉄筋の組み立てにおいて、交差する鉄筋を連結する技術に関する。   The present invention relates to a technique for connecting intersecting reinforcing bars in assembling reinforcing bars.

床スラブ、支柱、あるいは梁等の鉄筋コンクリートを建造するときには、鉄筋を所定の間隔を隔てて配筋し、この配筋の周囲を型枠で囲ってコンクリートを打設する。ここで、鉄筋を配設したり、コンクリートを打設したりする際には、配筋した鉄筋の位置がずれないように鉄筋同士を、鉄筋が交差する部分で連結しておく。従来、この鉄筋同士の連結は、交差する鉄筋に針金を巻きつける結束や、鉄筋同士の溶接によって行われてきた。   When building reinforced concrete such as floor slabs, columns, or beams, reinforcing bars are arranged at a predetermined interval, and concrete is placed by surrounding the reinforcing bars with a formwork. Here, when arranging reinforcing bars or placing concrete, the reinforcing bars are connected to each other at a portion where the reinforcing bars intersect so that the positions of the reinforcing bars are not shifted. Conventionally, the connection between the reinforcing bars has been performed by binding a wire around the reinforcing reinforcing bars or welding the reinforcing bars.

しかしながら、結束による連結では結束が緩むおそれがあるし、溶接による場合では適用可能な鉄筋の種類に制約がある上、アンダーカットを生じて鉄筋の強度を損なうおそれがあった。また、いずれによる場合でも、手間や時間がかかっていた。   However, there is a risk that the binding may be loosened in the connection by binding, and in the case of welding, there are limitations on the types of reinforcing bars that can be applied, and there is a risk that the undercut may occur and the strength of the reinforcing bars may be impaired. In any case, it takes time and effort.

この点、特許文献1では、一対の鉄筋等の棒状体を略十字状に交差させて配筋するにあたり、その交差状態を保持して互いに結束させるための結束具であって、前記交差する各棒状体の外周面に沿ってラウンドし、それら外周面に弾性的に挟持可能で、しかも各棒状体をその内部に嵌合させるための嵌合口が形成された少なくとも一対の円弧板状のクランプ板部と、これら一対のクランプ板部を連結する連結板部とを備えた鉄筋等の棒状体の結束具が提案されている。
特許文献2では、鉄筋と繋ぎ鉄筋とを交差状態で固定するためのジョイントクリップを準備しておき、鉄筋コンクリート躯体を施工するに際して、複数の鉄筋を一方向に向けて平行に並べ、これに交差させて繋ぎ鉄筋を、ジョイントクリップを使用して固定することにより一方向メッシュを製作した後、この一方向メッシュを利用して柱又は梁の配筋を行って鉄筋コンクリート躯体を構築する鉄筋コンクリート躯体の施工方法が提案されている。
特許文献3では、基板の一方の鉄筋を嵌める第1嵌合溝が形成され、他方の面に他方の鉄筋を嵌める第2嵌合溝が形成され、両嵌合溝の少なくとも一方の内周面に、鉄筋の凸部と係合することで鉄筋の軸線方向の位置ずれを防止する突起が設けられている鉄筋クリップが提案されている。
特許文献4では、交差する二つの鉄筋を固定するための鉄筋固定用冶具であって、弾力性のある合成樹脂材料からなり一方の鉄筋を強制的にはめ込んでクランプするためのはめ込み用のスリットが形成されたC字形状の第1クランプ部材と、弾力性のある合成樹脂材料からなり他方の鉄筋を強制的にはめ込んでクランプするためのはめ込み用のスリットが形成されたC字形状の第2句ランプ部材とを具え、前記第1及び第2クランプ部材が前記二つの鉄筋の交差状態に応じた交差角度をもって固着されている鉄筋固定用冶具が提案されている。
In this regard, Patent Document 1 is a binding tool for holding a cross-shaped rod-shaped body such as a pair of reinforcing bars so that the bars are bound to each other while maintaining the crossed state. At least a pair of arc plate-shaped clamp plates that are rounded along the outer peripheral surface of the rod-shaped body and can be elastically sandwiched between the outer peripheral surfaces, and in which fitting holes for fitting each rod-shaped body are formed therein A binding tool for a rod-like body such as a reinforcing bar has been proposed that includes a portion and a connecting plate portion that connects the pair of clamp plate portions.
In Patent Document 2, a joint clip for fixing a reinforcing bar and a connecting reinforcing bar in an intersecting state is prepared, and when constructing a reinforced concrete frame, a plurality of reinforcing bars are arranged in parallel in one direction and intersected with each other. Reinforced concrete frame construction method in which a one-way mesh is manufactured by fixing joint bars using joint clips, and then a column or beam is arranged using this one-way mesh to construct a reinforced concrete frame Has been proposed.
In Patent Document 3, a first fitting groove for fitting one reinforcing bar of the substrate is formed, a second fitting groove for fitting the other reinforcing bar is formed on the other surface, and at least one inner peripheral surface of both fitting grooves. In addition, there has been proposed a reinforcing bar clip provided with a protrusion that engages with a convex portion of the reinforcing bar to prevent the positional deviation of the reinforcing bar in the axial direction.
In Patent Document 4, a rebar fixing jig for fixing two crossing reinforcing bars, which is made of an elastic synthetic resin material, has a slit for fitting to forcibly fit and clamp one of the reinforcing bars. C-shaped first phrase formed of a C-shaped first clamp member and a slit made for fitting to clamp the other reinforcing bar by forcefully fitting the other reinforcing bar There has been proposed a reinforcing bar fixing jig including a ramp member, in which the first and second clamp members are fixed at an intersecting angle corresponding to the intersecting state of the two reinforcing bars.

特開平06−193200号公報Japanese Patent Laid-Open No. 06-193200 特開平09−158399号公報JP 09-158399 A 特開平11−36518号公報Japanese Patent Laid-Open No. 11-36518 特開平11−229559号公報Japanese Patent Laid-Open No. 11-229559

上記特許文献記載の技術では、金具が、断面円形の一対の鉄筋のいずれに対しても周方向において隙間なく当接しているため、鉄筋が金具内部で回転するなどして、位置ズレを生じやすい。このようなことは、金具を鉄筋に取り付ける際にも起こりやすく、取付作業がやりにくい場合がある。
また、鉄筋を金具に取り付ける際、予め規格化された嵌合溝等に鉄筋を嵌合させる方法では、鉄筋の寸法に応じて異なる金具を用意しなければならないし、鉄筋を嵌合させる際に嵌合溝が拡がるように歪んで嵌め込みが弱くなるおそれがある。
さらにいずれの金具も、一対の鉄筋のいずれに対しても、真っ直ぐな鉄筋の外周形状に応じて曲折した内周面を鉄筋の外周面にあてがう構造からなる。そのため、一の鉄筋に、別の鉄筋を巻き付けるように曲折させて交差させた場合に、この部分で鉄筋を連結しようとしても、曲折させた鉄筋にはうまく対応できなかった。
In the technique described in the above-mentioned patent document, since the metal fitting is in contact with any of the pair of reinforcing bars having a circular cross section without any gap in the circumferential direction, the rebar is likely to be misaligned by rotating inside the metal fitting. . Such a thing is easy to occur also when attaching a metal fitting to a reinforcing bar, and attachment work may be difficult.
In addition, when attaching a reinforcing bar to a metal fitting, the method of fitting the reinforcing bar into a standardized fitting groove or the like must prepare different metal fittings according to the size of the reinforcing bar. The fitting groove may be distorted so as to expand, and the fitting may be weakened.
Further, each of the metal fittings has a structure in which the inner peripheral surface bent according to the outer peripheral shape of the straight reinforcing bar is applied to the outer peripheral surface of the reinforcing bar with respect to any of the pair of reinforcing bars. For this reason, when one reinforcing bar is bent so that another reinforcing bar is wound and intersected, even if an attempt is made to connect the reinforcing bars at this portion, the bent reinforcing bars cannot be handled well.

そこで本発明は、簡単な作業で鉄筋を連結することができると共に、位置ズレの起こりにくい鉄筋の連結構造、及び鉄筋の連結工法を提供することを目的とする。
また、一定の範囲であれば、鉄筋の寸法によらず適応可能な連結金具による鉄筋の連結構造、及び鉄筋の連結工法を提供することを目的とする。
Therefore, an object of the present invention is to provide a reinforcing bar connecting structure and a reinforcing bar connecting method that can connect the reinforcing bars with a simple operation and are less likely to be displaced.
Moreover, if it is a fixed range, it aims at providing the connection structure of the reinforcing bar by the connecting metal fitting applicable regardless of the dimension of a reinforcing bar, and the connecting method of a reinforcing bar.

上記目的を達成するため、本発明の一の観点に係る鉄筋の連結構造は、一枚の金属板を成形してなり、略十字状に重ねて交差させた断面略円形の第一の鉄筋と第二の鉄筋とを連結する金具であって、当該第一の鉄筋の外周面に沿って弧状に折曲した断面逆U字状のクランプ部の内側に形成された嵌合溝と、当該クランプ部の両端から夫々延出した延出部の両端部において、折り返して形成された一対の鉤爪部と、を有する連結金具により、上記第一の鉄筋と第二の鉄筋とを連結させる鉄筋の連結構造であって、上記第一の鉄筋と第二の鉄筋は、夫々が交差する部分において、上記クランプ部と上記鉤爪部とにより挟み込まれており、上記第一の鉄筋が、上記嵌合溝に嵌め込まれ、上記連結金具の一対の鉤爪部が、上記第二の鉄筋の外周面にかしめ付けられて、当該第二の鉄筋の外周面に食い込んでいることを特徴とする。   In order to achieve the above object, a reinforcing bar connection structure according to one aspect of the present invention includes a first reinforcing bar having a substantially circular cross section formed by molding a single metal plate and intersecting each other in a substantially cross shape. A fitting for connecting the second rebar, a fitting groove formed inside a clamp portion having an inverted U-shaped cross section bent in an arc along the outer peripheral surface of the first rebar, and the clamp Reinforcing bar connection that connects the first reinforcing bar and the second reinforcing bar by a connecting metal fitting having a pair of claws formed at both ends of the extending part that extends from both ends of the part. In the structure, the first reinforcing bar and the second reinforcing bar are sandwiched between the clamp part and the claw part at a portion where each intersects, and the first reinforcing bar is inserted into the fitting groove. The pair of claws of the coupling metal fittings are connected to the outer peripheral surface of the second reinforcing bar. Attached order, characterized in that bite into the outer peripheral surface of the second reinforcing bar.

また、上記クランプ部の両端部から上記鉤爪部にかけて延出する延出部には夫々、上記第二の鉄筋を嵌入させるための切欠部が形成されているものとしてもよい。   Moreover, it is good also as a notch part for inserting said 2nd reinforcing bar in the extension part extended from the both ends of the said clamp part to the said claw part, respectively.

また、上記第一の鉄筋は上記第二の鉄筋に比して長径であるものとしてもよい。   Further, the first reinforcing bar may have a longer diameter than the second reinforcing bar.

また、上記第一の鉄筋及び第二の鉄筋は、異形鉄筋であるものとしてもよい。   The first reinforcing bar and the second reinforcing bar may be deformed reinforcing bars.

また、上記第二の鉄筋は、上記第一の鉄筋と交差する箇所において、上記第一の鉄筋を内側にして屈曲しており、上記第一の鉄筋と上記第二の鉄筋が交差する部分において、上記連結金具の一対の鉤爪部が、上記第二の鉄筋が屈曲する箇所を間にして、上記第二の鉄筋の外周面にかしめ付けられているものとしてもよい。   In addition, the second reinforcing bar is bent at the location where the first reinforcing bar crosses the first reinforcing bar, and the first reinforcing bar and the second reinforcing bar intersect at a portion where the first reinforcing bar crosses the first reinforcing bar. The pair of claw portions of the coupling fitting may be caulked to the outer peripheral surface of the second reinforcing bar with the second reinforcing bar bent in between.

また、本発明の別の観点に係る鉄筋の連結工法は、一枚の金属板を成形してなり、略十字状に重ねて交差させた断面略円形の第一の鉄筋と第二の鉄筋とを連結する金具であって、当該第一の鉄筋の外周面に沿って弧状に折曲した断面逆U字状のクランプ部の内側に形成された嵌合溝と、当該クランプ部の両端から夫々延出した延出部の両端部において、折り返して形成された一対の鉤爪部と、を有する連結金具により、上記第一の鉄筋と第二の鉄筋を、夫々が交差する部分において、上記クランプ部と上記鉤爪部とにより挟み込み、上記第一の鉄筋と第二の鉄筋とを連結させる鉄筋の連結工法であって、上記第一の鉄筋を、上記嵌合溝に嵌め込む工程と、上記連結金具の一対の鉤爪部を、上記第二の鉄筋の外周面にかしめ付けて、当該第二の鉄筋の外周面に食い込ませる工程と、を有することを特徴とする。   In addition, the reinforcing bar connecting method according to another aspect of the present invention is a first reinforcing bar and a second reinforcing bar which are formed by molding a single metal plate and overlap each other in a substantially cross shape. Fitting grooves formed on the inside of a clamp portion having an inverted U-shaped cross section bent in an arc along the outer peripheral surface of the first reinforcing bar, and both ends of the clamp portion, respectively. The clamp part at the portion where the first reinforcing bar and the second reinforcing bar cross each other by a connecting metal fitting having a pair of claws formed at both ends of the extended part. A reinforcing bar connecting method for connecting the first reinforcing bar and the second reinforcing bar, the step of fitting the first reinforcing bar into the fitting groove, and the connecting fitting. Caulking the pair of claws to the outer peripheral surface of the second reinforcing bar, And having a step of cutting into the outer peripheral surface of the muscle, the.

また、上記クランプ部の外周面形状に即した凹部が形成され、当該凹部に上記クランプ部が嵌め込まれた上記連結金具を押圧する第一のダイスと、平坦な押圧面を有し、当該押圧面に上記鉤爪部が当接させられた上記連結金具を押圧する第二のダイスと、当該第一のダイスと当該第二のダイスとの間に挟み込んだ連結金具に押圧力をかける圧着機構とを有し、上記鉤爪部を上記第二の鉄筋にかしめ付けるための圧着器を用いて行われ、上記第一の鉄筋が上記嵌合溝に嵌め込まれたクランプ部を上記第一のダイスの凹部に嵌め込む工程、をさらに有し、上記連結金具の鉤爪部を、上記第二の鉄筋の外周面にかしめ付ける工程が、上記鉤爪部に上記第二のダイスの押圧面を当接させた上、上記圧着機構によって、上記第一のダイスと上記第二のダイスとで、上記第一の鉄筋と上記第二の鉄筋とが嵌め込まれた連結金具を押圧することにより行われるものとしてもよい。   Further, a recess conforming to the shape of the outer peripheral surface of the clamp part is formed, the first die for pressing the connecting metal fitting in which the clamp part is fitted in the recess, and a flat pressing surface, the pressing surface A second die that presses the connection fitting with which the claw portion is brought into contact, and a pressure-bonding mechanism that applies a pressing force to the connection fitting sandwiched between the first die and the second die. A clamping part in which the first reinforcing bar is fitted in the fitting groove is formed in the concave part of the first die, and the crimping part is used to crimp the claw part to the second reinforcing bar. The step of caulking the claw portion of the connecting metal fitting to the outer peripheral surface of the second rebar, after the pressing surface of the second die is brought into contact with the claw portion, By the crimping mechanism, the first die and the second die are Scan in a, or as being performed by pressing the connecting metal fitting the first reinforcing bar and the said second reinforcing bars is fitted.

本発明によれば、簡単な作業で鉄筋を連結することができると共に、位置ズレが起こりにくい状態に鉄筋を連結することができる。
また、一定の範囲であれば、鉄筋の寸法によらず鉄筋同士の連結が可能である。
ADVANTAGE OF THE INVENTION According to this invention, while being able to connect a reinforcing bar by simple operation | work, it can connect a reinforcing bar in the state which a position shift does not occur easily.
Moreover, if it is a fixed range, it will be possible to connect the reinforcing bars regardless of the dimensions of the reinforcing bars.

本発明の実施形態に係る鉄筋の連結構造を示す外観斜視図である。It is an appearance perspective view showing the connection structure of the reinforcing bar concerning the embodiment of the present invention. 本実施形態に係る鉄筋の連結構造を示す(a)平面図、(b)正面図、(c)側断面図である。It is the (a) top view, (b) front view, and (c) side sectional view showing the connection structure of the reinforcing bar concerning this embodiment. 本実施形態に係る鉄筋の連結構造において、鉄筋を連結する連結金具を示す外観斜視図である。It is an external appearance perspective view which shows the connection metal fitting which connects a reinforcing bar in the reinforcing bar connection structure which concerns on this embodiment. 本発明の別の実施形態に係る鉄筋の連結工法において、連結金具に鉄筋を嵌合させる工程を示す外観斜視図であって、(a)一の鉄筋を嵌合させる様子、(b)他の鉄筋を嵌合させる様子、(c)両方の鉄筋を嵌合させた様子を示す。In the reinforcing bar connecting method according to another embodiment of the present invention, it is an external perspective view showing a process of fitting a reinforcing bar to a connecting fitting, (a) a state of fitting one reinforcing bar, (b) other A state of fitting rebars, (c) a state of fitting both rebars. 本発明の別の実施形態に係る鉄筋の連結工法において、連結金具に鉄筋を嵌合させる工程を示す外観斜視図であって、(a)一の鉄筋を嵌合させる様子、(b)他の鉄筋を嵌合させる様子、(c)両方の鉄筋を嵌合させた様子を示す。In the reinforcing bar connecting method according to another embodiment of the present invention, it is an external perspective view showing a process of fitting a reinforcing bar to a connecting fitting, (a) a state of fitting one reinforcing bar, (b) other A state of fitting rebars, (c) a state of fitting both rebars. 本実施形態に係る鉄筋の連結工法において、連結金具の鉤爪部を鉄筋にかしめ付ける工程を示す正面断面図であって、(a)かしめ付ける前、(b)かしめ付けた後を示す。FIG. 4 is a front cross-sectional view showing a step of caulking the claw portion of the connecting metal fitting to the reinforcing bar in the method of connecting reinforcing bars according to the present embodiment, showing (a) before caulking and (b) after caulking. 本実施形態に係る鉄筋の連結工法において、連結金具の鉤爪部を鉄筋にかしめ付ける際に用いる圧着器を示す外観斜視図であって、(a)全体、(b)固定ダイスを示す。It is an external appearance perspective view which shows the crimping machine used when caulking a claw part of a connecting metal fitting to a reinforcing bar in the connecting method of a reinforcing bar concerning this embodiment, and shows (a) whole and (b) fixed dies. 本実施形態に係る鉄筋の連結工法において、連結金具の鉤爪部を鉄筋にかしめ付ける際に、圧着器を連結金具にあてがう様子を示す外観斜視図である。FIG. 6 is an external perspective view showing a state in which a crimping device is applied to a connecting metal fitting when the claws of the connecting metal fitting are caulked to the reinforcing bar in the reinforcing bar connecting method according to the present embodiment. 本実施形態に係る鉄筋の連結工法において、圧着器により連結金具の鉤爪部が鉄筋にかしめ付けられる様子を示す正面断面図であって、(a)かしめ付ける前、(b)かしめ付けた後を示す。In the reinforcing bar connecting method according to the present embodiment, a front cross-sectional view showing a state in which the claws of the connecting metal fittings are squeezed to the reinforcing bars by a crimping device, (a) before staking, (b) after staking Show. 本発明の別の実施形態に係る鉄筋の連結構造を示す外観斜視図である。It is an external appearance perspective view which shows the connection structure of the reinforcing bar which concerns on another embodiment of this invention. 本実施形態に係る鉄筋の連結構造を示す正面断面図である。It is front sectional drawing which shows the connection structure of the reinforcing bar which concerns on this embodiment. 本実施形態に係る鉄筋の連結構造を形成するための連結工法において、圧着器により連結金具の鉤爪部が鉄筋にかしめ付けられる様子を示す正面図であって、(a)かしめ付ける前、(b)かしめ付けた後を示す。In the connection method for forming the connection structure of the reinforcing bar which concerns on this embodiment, it is a front view which shows a mode that the claw part of a connection metal fitting is crimped to a reinforcing bar with a crimping | crimping machine, Comprising: (a) Before crimping, (b ) Shows after caulking. 本発明の別の実施形態に係る鉄筋の連結構造を示す正面断面図である。It is front sectional drawing which shows the connection structure of the reinforcing bar which concerns on another embodiment of this invention. 本実施形態に係る鉄筋の連結構造において、鉄筋を連結する連結金具を示す外観斜視図である。It is an external appearance perspective view which shows the connection metal fitting which connects a reinforcing bar in the reinforcing bar connection structure which concerns on this embodiment. 本実施形態に係る鉄筋の連結工法において、連結金具の鉤爪部を鉄筋にかしめ付ける工程を示す正面断面図であって、(a)かしめ付ける前、(b)かしめ付けた後を示す。FIG. 4 is a front cross-sectional view showing a step of caulking the claw portion of the connecting metal fitting to the reinforcing bar in the method of connecting reinforcing bars according to the present embodiment, showing (a) before caulking and (b) after caulking. 本発明の別の実施形態に係る鉄筋の連結構造を示す外観斜視図である。It is an external appearance perspective view which shows the connection structure of the reinforcing bar which concerns on another embodiment of this invention. 本実施形態に係る鉄筋の連結工法において、連結金具の鉤爪部を鉄筋にかしめ付ける工程を示す正面断面図であって、(a)かしめ付ける前、(b)かしめ付けた後を示す。FIG. 4 is a front cross-sectional view showing a step of caulking the claw portion of the connecting metal fitting to the reinforcing bar in the method of connecting reinforcing bars according to the present embodiment, showing (a) before caulking and (b) after caulking. 本発明の別の実施形態に係る鉄筋の連結構造を示す外観斜視図である。It is an external appearance perspective view which shows the connection structure of the reinforcing bar which concerns on another embodiment of this invention. 本実施形態に係る鉄筋の連結構造において、鉄筋を連結する連結金具を示す外観斜視図である。It is an external appearance perspective view which shows the connection metal fitting which connects a reinforcing bar in the reinforcing bar connection structure which concerns on this embodiment.

次に、本発明の実施形態に係る鉄筋の連結構造、及び当該構造を形成するための連結工法について、図を参照して説明する。
図1、図2は、本実施形態に係る鉄筋の連結構造を示している。
十字状に交差する鉄筋1、2は、鉄筋1が嵌め込まれる嵌合溝31Aと、鉄筋2にかしめ付けられる鉤爪部34とを備えた連結金具3により、一体的に連結されている。
Next, a connecting structure of reinforcing bars according to an embodiment of the present invention and a connecting method for forming the structure will be described with reference to the drawings.
1 and 2 show a connecting structure of reinforcing bars according to the present embodiment.
The reinforcing bars 1 and 2 crossing in a cross shape are integrally connected by a connecting metal fitting 3 provided with a fitting groove 31A into which the reinforcing bar 1 is fitted and a claw portion 34 that is caulked to the reinforcing bar 2.

鉄筋1、2はいずれも断面が略円形状の異形鉄筋である。
この鉄筋1、2の外周面上には、コンクリートやモルタルの付着性を高め、引き抜き力に抵抗する力を増すための凹凸状のリブ11、12、21、22が形成されている。
ここで、リブ11、12、21、22のうち、リブ11、21は夫々鉄筋1、2の軸線方向に沿って延びており、リブ12、22は夫々鉄筋1、2の周方向に沿って延びている。
Each of the reinforcing bars 1 and 2 is a deformed reinforcing bar having a substantially circular cross section.
On the outer peripheral surfaces of the reinforcing bars 1 and 2, concave and convex ribs 11, 12, 21, and 22 are formed to increase the adhesion of concrete and mortar and increase the force resisting the pulling force.
Here, of the ribs 11, 12, 21, 22, the ribs 11, 21 extend along the axial direction of the reinforcing bars 1, 2, respectively, and the ribs 12, 22 extend along the circumferential direction of the reinforcing bars 1, 2, respectively. It extends.

また、本例における鉄筋1には、鉄筋2に比して断面の直径が長いもの(太いもの)が用いられている。他方、鉄筋2には、鉄筋1に比して断面の直径が短いもの(細いもの)が用いられている。
具体的に想定される場面では、鉄筋1は梁主筋や柱主筋を、鉄筋2はこの梁主筋や柱主筋に巻きつけられるスターラップ(あばら筋)やフープ(帯筋)を構成する。
In addition, as the reinforcing bar 1 in this example, one having a longer cross-sectional diameter (thick) than the reinforcing bar 2 is used. On the other hand, as the reinforcing bar 2, a reinforcing bar having a shorter cross-sectional diameter than that of the reinforcing bar 1 is used.
In a specific scenario, the reinforcing bar 1 constitutes a beam main bar and a column main bar, and the reinforcing bar 2 constitutes a stirrup (bark) and a hoop (band) that are wound around the beam main bar and the column main bar.

連結金具3は、十字状に交差させた鉄筋1、2を連結させる金具であって、鋼やステンレスといった合金などからなる一枚の金属板を成形加工してなる。
この連結金具3について、連結に用いられる前の状態を図3に示す。
連結に用いられる前の状態において、連結金具3は、断面逆U字形状に屈曲して形成されたクランプ部31と、このクランプ部31の両端部から下方に延び出た延出部32とからなる。
The connecting metal fitting 3 is a metal fitting for connecting the reinforcing bars 1 and 2 crossed in a cross shape, and is formed by molding a single metal plate made of an alloy such as steel or stainless steel.
FIG. 3 shows a state before the connection fitting 3 is used for connection.
In a state before being used for connection, the connection fitting 3 is composed of a clamp part 31 formed by bending in an inverted U-shaped cross section, and an extension part 32 extending downward from both ends of the clamp part 31. Become.

クランプ部31は、鉄筋1の外周形状に即して断面略逆U字形状に屈曲している。クランプ部31がこのように屈曲していることで、その内側には、鉄筋1を嵌め込むための嵌合溝31Aが形成されている。   The clamp portion 31 is bent into a substantially inverted U-shaped cross section in accordance with the outer peripheral shape of the reinforcing bar 1. Since the clamp part 31 is bent in this way, a fitting groove 31A for fitting the reinforcing bar 1 is formed inside thereof.

クランプ部31の両端部から下方に延出した一対の延出部32には夫々、鉄筋2を嵌め込むために切り欠かれた切欠部33が形成されている。
この切欠部33は、奥から入口に向かって広く切り欠かれており、鉄筋2を嵌入させ易くなっている。
また、奥の部分は入口部分よりも深く、また、鉄筋2の外周形状に即して弧状に切り欠かれている。これにより、鉄筋2を切欠部33に嵌入させた状態において、鉄筋2がこの切欠部33から転がり出にくく、鉤爪部34によるかしめ付けの作業等を行いやすい。
A pair of extending portions 32 extending downward from both end portions of the clamp portion 31 are formed with notched portions 33 that are notched for fitting the reinforcing bars 2.
The notch 33 is notched widely from the back toward the entrance, and the rebar 2 can be easily inserted.
Further, the back portion is deeper than the entrance portion, and is cut out in an arc shape in accordance with the outer peripheral shape of the reinforcing bar 2. As a result, in a state where the reinforcing bar 2 is fitted into the notch 33, the reinforcing bar 2 is unlikely to roll out from the notch 33, and it is easy to perform a caulking operation by the claw portion 34 or the like.

さらに、延出部32の端部には、外側に向かって折り返された鉤爪部34が形成されている。この鉤爪部34は、鉄筋2にかしめ付けられる前は、図3に示されるように、外側に向かって略直角に折曲した形状で提供される。一方、鉄筋1と鉄筋2とを連結する際には、図2(b)に示されるように、さらに外側へ折り返され、切欠部33に嵌め込まれた鉄筋2にかしめ付けられる。
また、鉤爪部34は、鉄筋1、2の表面に形成されたリブ11、12、21、22による凹部、あるいは鉄筋1、2自体に食い込み、位置ズレが起きにくいようになっている。
Further, a claw portion 34 that is folded back toward the outside is formed at the end of the extension portion 32. As shown in FIG. 3, the claws 34 are provided in a shape bent substantially at right angles toward the outside before being caulked to the rebar 2. On the other hand, when connecting the reinforcing bar 1 and the reinforcing bar 2, as shown in FIG. 2B, the reinforcing bar 1 is further folded outward and crimped to the reinforcing bar 2 fitted into the notch 33.
Further, the claw portion 34 bites into the recesses formed by the ribs 11, 12, 21, 22 formed on the surfaces of the reinforcing bars 1, 2, or the reinforcing bars 1, 2 itself, and is not likely to be displaced.

以上の構成を有する連結金具3による鉄筋1、2の連結構造を鉄筋2の軸線方向でみると、図2(c)に示されるように、クランプ部31が鉄筋1を押さえつけている部分と、鉄筋1と鉄筋2とが交差する部分と、鉄筋2が鉤爪部34によってかしめ付けられている部分が、略一直線上に並ぶ。
これにより、鉄筋1と鉄筋2が交差する部分が上下から押さえつけられ、鉄筋1と鉄筋2が強固に連結されている。
When the connecting structure of the reinforcing bars 1 and 2 by the connecting fitting 3 having the above configuration is viewed in the axial direction of the reinforcing bar 2, as shown in FIG. 2C, a portion where the clamp part 31 presses the reinforcing bar 1; A portion where the reinforcing bar 1 and the reinforcing bar 2 intersect with each other and a portion where the reinforcing bar 2 is caulked by the claw portion 34 are arranged in a substantially straight line.
Thereby, the part where the reinforcing bar 1 and the reinforcing bar 2 intersect is pressed down from above and below, and the reinforcing bar 1 and the reinforcing bar 2 are firmly connected.

続いて、本実施形態に係る鉄筋の連結工法について図を参照して説明する。本実施形態に係る鉄筋の連結工法は、連結金具3を用いて鉄筋1、2を連結することにより、既述した鉄筋1、2の連結構造を提供する。
まず、鉄筋1、2を連結金具3に嵌め込む工程について説明する。
この工程の一例では、図4(a)に示されるように、予め所定の位置で鉄筋1、2を交差させておく。そして、当該鉄筋1、2が交差する箇所から僅かに離れた箇所において、連結金具3の嵌合溝31Aに鉄筋1を嵌め込む。この際、切欠部33が、鉄筋1、2が交差する部分に向くように嵌め込む。
それから図4(b)に示されるように、鉄筋1上において、連結金具3を鉄筋1の軸線方向に沿って摺動させる。
これにより、図4(c)に示されるように、切欠部33に鉄筋2が嵌まり込み、鉄筋1、2が連結金具3に嵌め込まれた状態となる。
Subsequently, a reinforcing bar connecting method according to the present embodiment will be described with reference to the drawings. The reinforcing bar connecting method according to the present embodiment provides the above-described connecting structure of the reinforcing bars 1 and 2 by connecting the reinforcing bars 1 and 2 using the connecting fitting 3.
First, the process of fitting the reinforcing bars 1 and 2 into the connection fitting 3 will be described.
In an example of this step, as shown in FIG. 4A, the reinforcing bars 1 and 2 are crossed in advance at predetermined positions. Then, the reinforcing bar 1 is fitted into the fitting groove 31 </ b> A of the connecting fitting 3 at a location slightly away from the location where the reinforcing bars 1 and 2 intersect. At this time, the notch 33 is fitted so as to face the portion where the reinforcing bars 1 and 2 intersect.
Then, as shown in FIG. 4B, the connecting fitting 3 is slid along the axial direction of the reinforcing bar 1 on the reinforcing bar 1.
As a result, as shown in FIG. 4C, the reinforcing bar 2 is fitted into the notch 33, and the reinforcing bars 1 and 2 are fitted into the connection fitting 3.

また、鉄筋1、2を連結金具3に嵌め込む工程は他の例によることもできる。
この例ではまず、図5(a)に示されるように、鉄筋1、2を交差させる箇所において、連結金具3の嵌合溝31Aに鉄筋1を嵌め込む。
それから、図5(b)に示されるように、連結金具3の切欠部33に鉄筋2を嵌め込む。
これにより、図5(c)に示されるように、連結金具3によって鉄筋1と鉄筋2とが十字状に交差し、鉄筋1、2が連結金具3に嵌め込まれた状態となる。
Moreover, the process of fitting the reinforcing bars 1 and 2 into the connection fitting 3 can be performed according to another example.
In this example, first, as shown in FIG. 5A, the reinforcing bar 1 is fitted into the fitting groove 31 </ b> A of the connecting fitting 3 at a location where the reinforcing bars 1 and 2 intersect.
Then, as shown in FIG. 5 (b), the rebar 2 is fitted into the notch 33 of the connection fitting 3.
As a result, as shown in FIG. 5C, the reinforcing bar 1 and the reinforcing bar 2 cross in a cross shape by the connecting fitting 3, and the reinforcing bars 1 and 2 are fitted into the connecting fitting 3.

次に、図6(a)に示されるように、連結金具3の鉤爪部34を外側に屈曲させ、鉄筋2に鉤爪部34をかしめ付ける。
これにより、図6(b)に示されるように、十字状に交差する部分においてクランプ部31と鉤爪部34により挟み込まれた鉄筋1と鉄筋2は、上方からクランプ部31によって押さえつけられると共に、下方から鉤爪部34によってかしめ付けられ、固定的に連結される。
Next, as shown in FIG. 6A, the claw portion 34 of the connecting fitting 3 is bent outward, and the claw portion 34 is caulked to the reinforcing bar 2.
As a result, as shown in FIG. 6B, the reinforcing bar 1 and the reinforcing bar 2 sandwiched between the clamp part 31 and the claw part 34 at the crossing portion are pressed by the clamp part 31 from above and downward. And are fixedly connected by the claw portion 34.

ここで、鉤爪部34によるかしめ付けに用いるのに好適な圧着器4を図7に示す。
図7(a)に示されるように、圧着器4は、鉄筋1、2が嵌め込まれた連結金具3を上下から挟み込んで押圧力を加え、鉤爪部34を屈曲させて鉄筋2にかしめ付ける工具である。
この圧着器4は、鉄筋1、2が嵌め込まれた連結金具3を上下から挟み込むコの字形状の圧着部41を具え、内部には、圧着部41により挟み込んだ連結金具3に押圧力を加えるための油圧式圧着器構を備えている。
Here, a crimping device 4 suitable for use in caulking by the claw portion 34 is shown in FIG.
As shown in FIG. 7 (a), the crimper 4 is a tool that clamps the rebar 2 by bending the claw portion 34 by sandwiching the connecting fitting 3 into which the rebars 1 and 2 are fitted from above and below and applying a pressing force. It is.
The crimping device 4 includes a U-shaped crimping portion 41 that sandwiches the connecting fitting 3 in which the reinforcing bars 1 and 2 are fitted from above and below, and applies a pressing force to the connecting fitting 3 sandwiched by the crimping portion 41 inside. It is equipped with a hydraulic crimping mechanism.

圧着部41には、鉄筋1、2が嵌合溝31A又は切欠部33に嵌め込まれた連結金具3を上方から押圧する固定ダイス41aと、下方から押圧する可動ダイス41bが設けられている。
固定ダイス41aは、図7(b)に示されるように、向かい合う一対の側面部が楕円形状に膨らんだ略直方体形状からなる。この固定ダイス41aには、クランプ部31の形状に即して、側面部が断面逆U字状に貫通して開口すると共に下面側に開口した凹部411が形成されている。
この固定ダイス41aは、圧着部41において、水平方向に自在に回転させることができ、圧着部41に挟み込まれた連結金具3のクランプ部31の向きに応じて、凹部411の向きを合わせることができる。
The crimping portion 41 is provided with a fixed die 41a that presses the connecting metal fitting 3 in which the reinforcing bars 1 and 2 are fitted in the fitting groove 31A or the cutout portion 33 from above and a movable die 41b that presses from below.
As shown in FIG. 7B, the fixed die 41a has a substantially rectangular parallelepiped shape in which a pair of side surfaces facing each other swell in an elliptical shape. In accordance with the shape of the clamp portion 31, the fixed die 41a is formed with a concave portion 411 having a side surface portion penetrating and opening in an inverted U-shaped cross section and opening on the lower surface side.
The fixed die 41 a can be freely rotated in the horizontal direction at the crimping portion 41, and the direction of the concave portion 411 can be adjusted according to the orientation of the clamp portion 31 of the connection fitting 3 sandwiched between the crimping portions 41. it can.

可動ダイス41bは円柱形状からなる。
この可動ダイス41bは、少なくとも連結金具3の鉤爪部34に当接し、この鉤爪部34を押圧する押圧面412を構成する上面が平坦に構成されていればよい。
また、この可動ダイス41bは、油圧式圧着機構を構成するピストンの先端に嵌着されており、ピストンの動きに従って上下する。これにより、固定ダイス41aと可動ダイス41bの間隔を広げたり狭めたりすることができ、圧着部41に挟み込んだ連結金具3に上下から押圧力を加えることができる。
The movable die 41b has a cylindrical shape.
The movable die 41b only needs to be in contact with at least the claw portion 34 of the connection fitting 3, and the upper surface constituting the pressing surface 412 that presses the claw portion 34 may be flat.
The movable die 41b is fitted to the tip of the piston that constitutes the hydraulic pressure bonding mechanism, and moves up and down according to the movement of the piston. Thereby, the space | interval of the fixed die | dye 41a and the movable die | dye 41b can be expanded or narrowed, and pressing force can be applied to the connection metal fitting 3 pinched | interposed into the crimping | compression-bonding part 41 from the upper and lower sides.

油圧式圧着機構は、ピストンを収装したシリンダ、シリンダ内を摺動するピストン等を備え、シリンダ内に作動油を供給する油圧源と接続している。さらに、この油圧式圧着機構を構成するピストンの先端部には、可動ダイス41bが嵌着されており、油圧源から供給された作動油によってピストンを摺動させることで、可動ダイス41bを固定ダイス41a側に移動させることができる。   The hydraulic pressure bonding mechanism includes a cylinder that houses a piston, a piston that slides inside the cylinder, and the like, and is connected to a hydraulic pressure source that supplies hydraulic oil into the cylinder. Further, a movable die 41b is fitted to the tip of the piston constituting the hydraulic pressure bonding mechanism, and the movable die 41b is fixed to the fixed die by sliding the piston with hydraulic oil supplied from a hydraulic source. It can be moved to the 41a side.

この圧着器4を用いて、鉤爪部34によるかしめ付けを行う場合には、図8に示されるように、十字状に交差する鉄筋1と鉄筋2夫々に対して斜めとなる位置から、圧着部41に連結金具3を挟み込ませる。この際、固定ダイス41aを回転させ、クランプ部31の形状に合わせて凹部411をあてがう。   When caulking by the claw portion 34 using this crimping device 4, as shown in FIG. 8, the crimping portion is positioned from a position that is oblique with respect to the reinforcing bar 1 and the reinforcing bar 2 that intersect in a cross shape. The connecting fitting 3 is sandwiched between 41. At this time, the fixed die 41 a is rotated, and the concave portion 411 is applied according to the shape of the clamp portion 31.

それから、図9に示されるように、ピストンを摺動させることにより可動ダイス41bを固定ダイス41a側に移動させ、凹部411及び押圧面412を介して鉤爪部34に押圧力を加えると、鉤爪部34は外側に屈曲させられて、鉄筋2にかしめ付けられる。さらに、押圧力を加えることで、鉤爪部34を鉄筋2に食い込ませ、強固に連結することができる。   Then, as shown in FIG. 9, when the movable die 41 b is moved to the fixed die 41 a side by sliding the piston and a pressing force is applied to the claw portion 34 via the concave portion 411 and the pressing surface 412, the claw portion 34 is bent outward and is caulked to the reinforcing bar 2. Furthermore, by applying a pressing force, the claw portion 34 can be bitten into the rebar 2 and can be firmly connected.

なお、鉤爪部34を鉄筋2にかしめ付ける際、鉤爪部34が外側に屈曲し易いように、かしめ付けによって屈曲する部分(延出部32と鉤爪部34の境界部分)の外側に、鉤爪部34の長さ方向と平行な条溝を形成しておいてもよい。これにより鉤爪部34は、かしめ付けの際、外側へ屈曲するように誘導され、当該条溝に沿ってきれいに屈曲する。   In addition, when the claw portion 34 is caulked to the reinforcing bar 2, the claw portion is provided outside the portion bent by caulking (the boundary portion between the extended portion 32 and the claw portion 34) so that the claw portion 34 is easily bent outward. A groove that is parallel to the length direction of 34 may be formed. As a result, the claw portion 34 is guided to bend outward during caulking, and bends cleanly along the groove.

これにより、簡単な作業で鉄筋1、2を連結することができる。
また、リブ11、12、21、22によって形成される鉄筋1、2の表面の凹部に鉤爪部34が食い込むため、連結した鉄筋1、2の位置ズレが起こりにくい。
また、鉤爪部43によるかしめ付けによって鉄筋1、2を連結することから、所定の範囲内であれば、鉄筋1、2の寸法によらず鉄筋1、2同士の連結が可能である。
Thereby, the rebars 1 and 2 can be connected by a simple operation.
Moreover, since the claw part 34 bites into the concave portion on the surface of the reinforcing bars 1 and 2 formed by the ribs 11, 12, 21, and 22, positional displacement of the connected reinforcing bars 1 and 2 is unlikely to occur.
Further, since the reinforcing bars 1 and 2 are connected by caulking by the claw portion 43, the reinforcing bars 1 and 2 can be connected to each other regardless of the dimensions of the reinforcing bars 1 and 2 within a predetermined range.

以上の構成からなる連結金具3によれば、真っ直ぐな鉄筋1、2同士が十字状に交差する箇所のみならず、鉄筋2が屈曲した箇所においても、鉄筋1、2同士を連結させることができる。この場合の連結構造を図10及び図11に示す。   According to the connecting metal fitting 3 having the above configuration, the reinforcing bars 1 and 2 can be connected not only at a place where the straight reinforcing bars 1 and 2 intersect in a cross shape but also at a place where the reinforcing bar 2 is bent. . The connection structure in this case is shown in FIGS.

鉄筋2は鉄筋1の外周形状に沿って屈曲し、鉄筋1の外周上に巻きつけられている。
そして、鉄筋1、2が交差する箇所において、鉄筋1は、鉄筋2と反対側から、嵌合溝31Aに嵌め込まれている。
また、鉤爪部34は、鉄筋1、2が交差する箇所において、鉄筋2が屈曲する箇所を間にして、鉄筋1の反対側から鉄筋2の外周面にかしめ付けられている。
The reinforcing bar 2 is bent along the outer peripheral shape of the reinforcing bar 1 and is wound on the outer periphery of the reinforcing bar 1.
And in the location where the reinforcing bars 1 and 2 cross, the reinforcing bar 1 is fitted into the fitting groove 31A from the side opposite to the reinforcing bar 2.
In addition, the claw portion 34 is caulked to the outer peripheral surface of the reinforcing bar 2 from the opposite side of the reinforcing bar 1 with the reinforcing bar 2 being bent at the location where the reinforcing bars 1 and 2 intersect.

続いて、この場合の連結工法について図12を参照して説明する。
ここでも、既述した圧着器を好適に用いることができるが、可動ダイス41bに替えて、可動ダイス41cを用いる。
可動ダイス41cの全体形状は、可動ダイス41bと同様に、円柱形状からなるが、中央部に円柱形状、あるいは直方体形状ないし立方体形状にくり貫かれた凹部413が形成されている。また、凹部413を取り囲む外縁部分の表面は、鉤爪部34を押圧する押圧面414を構成する。
Next, the connection method in this case will be described with reference to FIG.
Here, the above-described crimping device can be preferably used, but the movable die 41c is used instead of the movable die 41b.
Similar to the movable die 41b, the overall shape of the movable die 41c is a columnar shape, but a concave portion 413 is formed in the center portion that is hollowed into a columnar shape or a rectangular parallelepiped shape or a cubic shape. Further, the surface of the outer edge portion surrounding the recess 413 constitutes a pressing surface 414 that presses the claw portion 34.

可動ダイス41cが取り付けられた圧着器4を用いて、鉤爪部34によるかしめ付けを行う場合には、まず、十字状に交差する鉄筋1、2夫々に対して斜めとなる位置から、圧着部41に連結金具3を挟み込ませる。
この際、図12(a)に示されるように、固定ダイス41aを回転させ、クランプ部31の形状に合わせて凹部411をあてがう。
また、鉄筋2の屈曲した箇所に可動ダイス41cの凹部413を向かい合わせる。
When caulking by the claw portion 34 is performed using the crimping device 4 to which the movable die 41c is attached, first, the crimping portion 41 is inclined from a position that is inclined with respect to the reinforcing bars 1 and 2 that intersect in a cross shape. The connecting fitting 3 is sandwiched between the two.
At this time, as shown in FIG. 12A, the fixed die 41 a is rotated, and the concave portion 411 is applied according to the shape of the clamp portion 31.
Further, the concave portion 413 of the movable die 41c is opposed to the bent portion of the reinforcing bar 2.

それから、ピストンを摺動させることにより可動ダイス41cを固定ダイス41a側に移動させ、凹部411及び押圧面414を介して鉤爪部34に押圧力を加えると、鉤爪部34は外側に屈曲させられて、鉄筋2にかしめ付けられる。
この際、鉄筋2の屈曲した部分は、可動ダイス41cの凹部413に収まり、鉤爪部43のかしめ付けの邪魔にならない。
Then, when the movable die 41c is moved to the fixed die 41a side by sliding the piston and a pressing force is applied to the claw portion 34 via the concave portion 411 and the pressing surface 414, the claw portion 34 is bent outward. It is caulked to the reinforcing bar 2.
At this time, the bent portion of the reinforcing bar 2 is accommodated in the concave portion 413 of the movable die 41 c and does not interfere with the caulking of the claw portion 43.

次に、本発明の別の実施形態に係る鉄筋の連結構造、及び当該構造を形成するための連結工法について、図13を参照して説明する。
十字状に交差する鉄筋1、2は、鉄筋1が嵌め込まれる嵌合溝51Aと、鉄筋2にかしめ付けられる鉤爪部54とを備えた連結金具5により、一体的に連結されている。
本実施形態においては、連結金具3による連結とは異なり、連結金具5の鉤爪部54が、内側に折り返して鉄筋2にかしめ付けられている。
Next, a connecting structure for reinforcing bars according to another embodiment of the present invention and a connecting method for forming the structure will be described with reference to FIG.
The reinforcing bars 1 and 2 crossing in a cross shape are integrally connected by a connecting metal fitting 5 provided with a fitting groove 51A into which the reinforcing bar 1 is fitted and a claw portion 54 to be caulked to the reinforcing bar 2.
In the present embodiment, unlike the connection by the connection fitting 3, the claw portion 54 of the connection fitting 5 is folded inward and caulked to the reinforcing bar 2.

ここで、連結金具5は連結金具3と同様、十字状に交差させた鉄筋1、2を連結させる金具であって、鋼やステンレスといった合金などからなる一枚の金属板を成形加工してなる。
また、この連結金具5について、連結に用いられる前の状態を図14に示す。
連結金具5は、嵌合溝51Aが形成されたクランプ部51と、切欠部53と鉤爪部54が形成された延出部52からなる。クランプ部51、嵌合溝51A、延出部52、及び切欠部53の構成は夫々、連結金具3のクランプ部31、嵌合溝31A、延出部32、及び切欠部33の構成と同様である。
Here, like the connection fitting 3, the connection fitting 5 is a fitting for connecting the reinforcing bars 1 and 2 crossed in a cross shape, and is formed by processing a single metal plate made of an alloy such as steel or stainless steel. .
Moreover, about this connection metal fitting 5, the state before being used for connection is shown in FIG.
The connecting fitting 5 includes a clamp part 51 in which a fitting groove 51A is formed, and an extending part 52 in which a notch part 53 and a claw part 54 are formed. The configurations of the clamp portion 51, the fitting groove 51A, the extension portion 52, and the notch portion 53 are the same as the configurations of the clamp portion 31, the fitting groove 31A, the extension portion 32, and the notch portion 33 of the connection fitting 3, respectively. is there.

一方、延出部52の端部に形成された鉤爪部54は、連結金具3と異なり、内側に向かって略直角に折り返した形状で提供される。
この鉤爪部54は、鉄筋1と鉄筋2とを連結する際には、図15に示されるように、さらに内側へ折り返され、切欠部52に嵌め込まれた鉄筋2にかしめ付けられる。
On the other hand, unlike the connection fitting 3, the claw portion 54 formed at the end of the extension portion 52 is provided in a shape folded back at a substantially right angle toward the inside.
When the reinforcing bar 1 and the reinforcing bar 2 are connected to each other, the claws 54 are folded back further inward and caulked to the reinforcing bar 2 fitted into the notch 52 as shown in FIG.

この連結金具5により、鉄筋1と鉄筋2とを連結する工程については、まず、既述した連結工程と同様に、連結金具の嵌合溝51A及び切欠部53に夫々、鉄筋1及び鉄筋2を嵌め込む。それから適宜、圧着器4を用い、連結金具5を挟み込んで押圧力を加え、鉤爪部54を内側に屈曲させて、鉤爪部54を鉄筋2にかしめ付ける。これにより、連結金具5の鉤爪部54が鉄筋2にかしめ付けられ、さらに押圧力を加えることで、鉤爪部54を鉄筋2に食い込ませることができる。   With respect to the step of connecting the reinforcing bar 1 and the reinforcing bar 2 with the connecting bracket 5, first, the reinforcing bar 1 and the reinforcing bar 2 are respectively inserted into the fitting groove 51A and the notch 53, respectively, in the same manner as the connecting step described above. Fit. Then, using the crimping device 4, the connecting metal fitting 5 is sandwiched and a pressing force is applied, the claw portion 54 is bent inward, and the claw portion 54 is caulked to the reinforcing bar 2. Thereby, the claw part 54 of the connection metal fitting 5 is caulked to the reinforcing bar 2, and the claw part 54 can be bitten into the reinforcing bar 2 by applying a pressing force.

なお、鉤爪部54を鉄筋2にかしめ付ける際、鉤爪部54が内側に屈曲し易いように、かしめ付けによって屈曲する部分(延出部52と鉤爪部54の境界部分)の内側に、鉤爪部54の長さ方向と平行な条溝を形成しておいてもよい。これにより鉤爪部54は、かしめ付けの際、内側へ屈曲するように誘導され、当該条溝に沿ってきれいに屈曲する。   In addition, when the claw portion 54 is caulked to the reinforcing bar 2, the claw portion is disposed inside the portion bent by caulking (the boundary portion between the extension portion 52 and the claw portion 54) so that the claw portion 54 is easily bent inward. 54 may be formed in parallel with the longitudinal direction. As a result, the claw portion 54 is guided to bend inward during caulking, and bends neatly along the groove.

さらに、以上の構成かなる連結金具5は、連結金具3と同様に、鉄筋2が屈曲した箇所においても、鉄筋1、2同士を連結させることができる。この場合の連結構造を図16に示す。   Furthermore, similarly to the connection fitting 3, the connection fitting 5 having the above configuration can connect the reinforcing bars 1 and 2 even at a location where the rebar 2 is bent. The connection structure in this case is shown in FIG.

鉄筋2は鉄筋1の外周形状に沿って屈曲し、鉄筋1の外周上に巻きつけられている。
そして、鉄筋1、2が交差する箇所において、鉄筋1は、鉄筋2と反対側から、嵌合溝51Aに嵌め込まれている。
また、鉤爪部54は、鉄筋1、2が交差する箇所において、鉄筋2が屈曲する箇所を間にして、鉄筋1の反対側から鉄筋2の外周面にかしめ付けられている。かしめ付けにおいては、連結金具3の場合と異なり、鉤爪部54は内側に屈曲している。
The reinforcing bar 2 is bent along the outer peripheral shape of the reinforcing bar 1 and is wound on the outer periphery of the reinforcing bar 1.
And in the location where the reinforcing bars 1 and 2 intersect, the reinforcing bar 1 is fitted into the fitting groove 51A from the opposite side to the reinforcing bar 2.
Further, the claw portion 54 is caulked to the outer peripheral surface of the reinforcing bar 2 from the opposite side of the reinforcing bar 1 at a position where the reinforcing bars 1 and 2 cross each other at a position where the reinforcing bar 2 is bent. In the caulking, unlike the case of the connection fitting 3, the claw portion 54 is bent inward.

鉄筋1と、屈曲した鉄筋2とを連結する工程についても、連結金具3において既述したのと同様の工程によることができる。即ち、図17に示されるように、連結金具の嵌合溝51A及び切欠部53に夫々、鉄筋1及び鉄筋2を嵌め込む。それから、可動ダイス41cが取り付けられた圧着器4を適宜用いて、連結金具5を挟み込んで押圧力を加え、鉤爪部54を内側に屈曲させて、鉤爪部54を鉄筋2にかしめ付ける。これにより、連結金具5の鉤爪部54が鉄筋2にかしめ付けられ、さらに押圧力を加えることで、鉤爪部54を鉄筋2に食い込ませることができる。   The process of connecting the reinforcing bar 1 and the bent reinforcing bar 2 can also be performed by the same process as described in the connection fitting 3. That is, as shown in FIG. 17, the reinforcing bar 1 and the reinforcing bar 2 are fitted into the fitting groove 51 </ b> A and the notch 53, respectively. Then, using the crimper 4 to which the movable die 41 c is attached, the connecting metal fitting 5 is sandwiched and a pressing force is applied, the claw portion 54 is bent inward, and the claw portion 54 is caulked to the reinforcing bar 2. Thereby, the claw part 54 of the connection metal fitting 5 is caulked to the reinforcing bar 2, and the claw part 54 can be bitten into the reinforcing bar 2 by applying a pressing force.

また、さらに別の実施形態に係る鉄筋の連結構造を図18に示す。
この例では、十字状に交差する鉄筋1、2は、鉄筋1が嵌め込まれる嵌合溝61Aと、鉄筋2を挿通させる挿通孔63と、鉄筋2にかしめ付けられる鉤爪部64とを備えた連結金具6により、一体的に連結されている。
本実施形態においては、鉄筋2が切欠部33に嵌め込まれる、連結金具3による連結とは異なり、連結金具6に形成された挿通孔63に鉄筋2が挿通されている。
Moreover, the connection structure of the reinforcing bar which concerns on another embodiment is shown in FIG.
In this example, the reinforcing bars 1 and 2 intersecting in a cross shape are connected to each other with a fitting groove 61A into which the reinforcing bar 1 is fitted, an insertion hole 63 through which the reinforcing bar 2 is inserted, and a claw portion 64 that is caulked to the reinforcing bar 2. The metal fittings 6 are integrally connected.
In the present embodiment, the rebar 2 is inserted through the insertion hole 63 formed in the connection fitting 6, unlike the connection by the connection fitting 3 in which the rebar 2 is fitted into the notch 33.

ここで、連結金具6は連結金具3と同様、十字状に交差させた鉄筋1、2を連結させる金具であって、鋼やステンレスといった合金などからなる一枚の金属板を成形加工してなる。
また、この連結金具6について、連結に用いられる前の状態を図19に示す。
連結金具6は、嵌合溝61Aが形成されたクランプ部61と、挿通孔63と鉤爪部64が形成された延出部62とからなる。クランプ部61、嵌合溝61A、及び鉤爪部64の構成は夫々、連結金具3のクランプ部31、嵌合溝31A、及び鉤爪部34の構成と同様である。なお、鉤爪部64は、連結金具5の鉤爪部54のように、内側に折り返されたものであってもよい。
Here, like the connection fitting 3, the connection fitting 6 is a fitting for connecting the reinforcing bars 1 and 2 crossed in a cross shape, and is formed by molding a single metal plate made of an alloy such as steel or stainless steel. .
Moreover, about this connection metal fitting 6, the state before being used for connection is shown in FIG.
The connection fitting 6 includes a clamp part 61 in which a fitting groove 61A is formed, and an extension part 62 in which an insertion hole 63 and a claw part 64 are formed. The configurations of the clamp portion 61, the fitting groove 61A, and the claw portion 64 are the same as the configurations of the clamp portion 31, the fitting groove 31A, and the claw portion 34 of the connection fitting 3, respectively. The claw portion 64 may be folded back inside like the claw portion 54 of the connection fitting 5.

一方、延出部62には、連結金具3と異なり、鉄筋2を挿通させるための一対の挿通孔63が形成されている。この挿通孔63はその断面が、鉄筋2の直径よりも僅かに大きい円状に形成されている。   On the other hand, unlike the connection fitting 3, the extension portion 62 is formed with a pair of insertion holes 63 for inserting the reinforcing bars 2. The insertion hole 63 is formed in a circular shape whose cross section is slightly larger than the diameter of the reinforcing bar 2.

この連結金具6により、鉄筋1と鉄筋2とを連結する工程については、鉄筋1を嵌合溝61Aに嵌め込むと共に、鉄筋2を一対の挿通孔63に挿通させる。鉄筋1、2の取り付けの順番は、施工に応じて任意に選択することができる。
なお、鉤爪部64を鉄筋2にかしめ付ける工程は、連結金具3、5による連結工程において既述した工程と同様に行うことができる。
With respect to the step of connecting the reinforcing bar 1 and the reinforcing bar 2 with the connecting fitting 6, the reinforcing bar 1 is fitted into the fitting groove 61 </ b> A and the reinforcing bar 2 is inserted into the pair of insertion holes 63. The order of attaching the reinforcing bars 1 and 2 can be arbitrarily selected according to the construction.
In addition, the process of caulking the claw portion 64 to the reinforcing bar 2 can be performed in the same manner as the process described above in the connecting process using the connecting fittings 3 and 5.

以上の本実施形態に係る鉄筋の連結構造、及び鉄筋の連結工法によれば、簡単な作業で鉄筋1、2を連結することができる。また、かしめ付けによって鉄筋1、2を連結するため、一定の範囲の寸法であれば、鉄筋1、2の寸法によらず連結を行うことができる。また、鉄筋1、2の外周面上に形成されているリブ11、12、21、22による凹凸と、鉤爪部34、54とが係止し合って、位置ズレが起こりにくい状態に鉄筋1、2を連結することができる。さらに、鉄筋2を屈曲させて、鉄筋1に巻きつけた箇所であっても、連結金具3、5を用いて、鉄筋1、2を連結させることができる。   According to the reinforcing bar connecting structure and the reinforcing bar connecting method according to the above embodiment, the reinforcing bars 1 and 2 can be connected by a simple operation. In addition, since the reinforcing bars 1 and 2 are connected by caulking, the connecting can be performed regardless of the dimensions of the reinforcing bars 1 and 2 as long as the dimensions are within a certain range. Moreover, the unevenness | corrugation by the ribs 11, 12, 21, and 22 formed on the outer peripheral surface of the reinforcing bars 1 and 2 and the claw portions 34 and 54 are engaged with each other, and the reinforcing bars 1 and 2 are in a state in which misalignment hardly occurs. 2 can be linked. Furthermore, even if it is the location where the reinforcing bar 2 is bent and wound around the reinforcing bar 1, the reinforcing bars 1 and 2 can be connected using the connecting fittings 3 and 5.

1、2 鉄筋
11、12、21、22 リブ
3、5、6 連結金具
31、51、61 クランプ部
31A、51A、61A 嵌合溝
32、52、62 延出部
33、53 切欠部
34、54、64 鉤爪部
4 圧着器
41 圧着部
41a 固定ダイス
41b、41c 可動ダイス
411、413 凹部
412、414 押圧面
63 挿通孔
1, 2 Reinforcing bar 11, 12, 21, 22 Rib 3, 5, 6 Connecting bracket 31, 51, 61 Clamping part 31A, 51A, 61A Fitting groove 32, 52, 62 Extension part 33, 53 Notch part 34, 54 64 Claw portion 4 Crimping device 41 Crimping portion 41a Fixed die 41b, 41c Movable die 411, 413 Recessed portion 412, 414 Pressing surface 63 Insertion hole

Claims (7)

一枚の金属板を成形してなり、略十字状に重ねて交差させた断面略円形の第一の鉄筋と第二の鉄筋とを連結する金具であって、当該第一の鉄筋の外周面に沿って弧状に折曲した断面逆U字状のクランプ部の内側に形成された嵌合溝と、当該クランプ部の両端から夫々延出した延出部の両端部において、折り返して形成された一対の鉤爪部と、を有する連結金具により、
上記第一の鉄筋と第二の鉄筋とを連結させる鉄筋の連結構造であって、
上記第一の鉄筋と第二の鉄筋は、夫々が交差する部分において、上記クランプ部と上記鉤爪部とにより挟み込まれており、
上記第一の鉄筋が、上記嵌合溝に嵌め込まれ、
上記連結金具の一対の鉤爪部が、上記第二の鉄筋の外周面にかしめ付けられて、当該第二の鉄筋の外周面に食い込んでいる、
ことを特徴とする鉄筋の連結構造。
A metal fitting formed by molding a single metal plate and connecting a first reinforcing bar and a second reinforcing bar having a substantially circular cross section, which are overlapped in a substantially cross shape, and an outer peripheral surface of the first reinforcing bar Folded at both ends of the fitting groove formed on the inside of the clamp portion having an inverted U-shaped cross section bent in an arc shape and the extending portion respectively extending from both ends of the clamp portion. With a connecting bracket having a pair of claws,
Reinforcing bar connection structure connecting the first reinforcing bar and the second reinforcing bar,
The first rebar and the second rebar are sandwiched between the clamp part and the claw part at the part where each intersects,
The first rebar is fitted into the fitting groove,
A pair of claw portions of the connecting metal fitting is caulked to the outer peripheral surface of the second rebar, and bites into the outer peripheral surface of the second rebar,
Reinforcing bar connection structure.
上記クランプ部の両端部から上記鉤爪部にかけて延出する延出部には夫々、上記第二の鉄筋を嵌入させるための切欠部が形成されている、
請求項1記載の鉄筋の連結構造。
Each of the extending portions extending from both ends of the clamp portion to the claw portion is formed with a notch for inserting the second rebar,
The reinforcing bar connection structure according to claim 1.
上記第一の鉄筋は上記第二の鉄筋に比して長径である、
請求項1又は2記載の鉄筋の連結構造。
The first reinforcing bar has a longer diameter than the second reinforcing bar,
The reinforcing bar connection structure according to claim 1 or 2.
上記第一の鉄筋及び第二の鉄筋は、異形鉄筋である、
請求項1乃至3いずれかの項に記載の鉄筋の連結構造。
The first reinforcing bar and the second reinforcing bar are deformed reinforcing bars,
The reinforcing bar connection structure according to any one of claims 1 to 3.
上記第二の鉄筋は、上記第一の鉄筋と交差する箇所において、上記第一の鉄筋を内側にして屈曲しており、
上記第一の鉄筋と上記第二の鉄筋が交差する部分において、上記連結金具の一対の鉤爪部が、上記第二の鉄筋が屈曲する箇所を間にして、上記第二の鉄筋の外周面にかしめ付けられている、
請求項1乃至4いずれかの項に記載の鉄筋の連結構造。
The second rebar is bent with the first rebar inward at the location where it intersects the first rebar,
In the portion where the first reinforcing bar and the second reinforcing bar intersect, the pair of claw portions of the coupling metal is placed on the outer peripheral surface of the second reinforcing bar with the second bent reinforcing bar in between. Squeezed,
The reinforcing bar connection structure according to any one of claims 1 to 4.
一枚の金属板を成形してなり、略十字状に重ねて交差させた断面略円形の第一の鉄筋と第二の鉄筋とを連結する金具であって、当該第一の鉄筋の外周面に沿って弧状に折曲した断面逆U字状のクランプ部の内側に形成された嵌合溝と、当該クランプ部の両端から夫々延出した延出部の両端部において、折り返して形成された一対の鉤爪部と、を有する連結金具により、
上記第一の鉄筋と第二の鉄筋を、夫々が交差する部分において、上記クランプ部と上記鉤爪部とにより挟み込み、上記第一の鉄筋と第二の鉄筋とを連結させる鉄筋の連結工法であって、
上記第一の鉄筋を、上記嵌合溝に嵌め込む工程と、
上記連結金具の一対の鉤爪部を、上記第二の鉄筋の外周面にかしめ付けて、当該第二の鉄筋の外周面に食い込ませる工程と、を有する、
ことを特徴とする鉄筋の連結工法。
A metal fitting formed by molding a single metal plate and connecting a first reinforcing bar and a second reinforcing bar having a substantially circular cross section, which are overlapped in a substantially cross shape, and an outer peripheral surface of the first reinforcing bar Folded at both ends of the fitting groove formed on the inside of the clamp portion having an inverted U-shaped cross section bent in an arc shape and the extending portion respectively extending from both ends of the clamp portion. With a connecting bracket having a pair of claws,
This is a connecting method of reinforcing bars in which the first reinforcing bar and the second reinforcing bar are sandwiched between the clamp part and the claw part at a portion where the first reinforcing bar and the second reinforcing bar cross each other, and the first reinforcing bar and the second reinforcing bar are connected. And
A step of fitting the first reinforcing bar into the fitting groove;
A step of caulking the pair of claws of the connecting metal fitting to the outer peripheral surface of the second reinforcing bar, and biting into the outer peripheral surface of the second reinforcing bar,
Reinforcement connection method characterized by this.
上記クランプ部の外周面形状に即した凹部が形成され、当該凹部に上記クランプ部が嵌め込まれた上記連結金具を押圧する第一のダイスと、平坦な押圧面を有し、当該押圧面に上記鉤爪部が当接させられた上記連結金具を押圧する第二のダイスと、当該第一のダイスと当該第二のダイスとの間に挟み込んだ連結金具に押圧力をかける圧着機構とを有し、上記鉤爪部を上記第二の鉄筋にかしめ付けるための圧着器を用いて行われ、
上記第一の鉄筋が上記嵌合溝に嵌め込まれたクランプ部を上記第一のダイスの凹部に嵌め込む工程、をさらに有し、
上記連結金具の鉤爪部を、上記第二の鉄筋の外周面にかしめ付ける工程が、上記鉤爪部に上記第二のダイスの押圧面を当接させた上、上記圧着機構によって、上記第一のダイスと上記第二のダイスとで、上記第一の鉄筋と上記第二の鉄筋とが嵌め込まれた連結金具を押圧することにより行われる、
上記請求項6記載の鉄筋の連結工法。
A recess conforming to the shape of the outer peripheral surface of the clamp portion is formed, the first die for pressing the connecting metal fitting in which the clamp portion is fitted in the recess, and a flat pressing surface, and the pressing surface includes the above-mentioned A second die that presses the connection fitting against which the claw portion is brought into contact; and a pressure-bonding mechanism that applies a pressing force to the connection fitting sandwiched between the first die and the second die. , Performed using a crimping device for caulking the claw portion to the second rebar,
A step of fitting the clamp portion in which the first reinforcing bar is fitted into the fitting groove into the concave portion of the first die,
The step of caulking the claw portion of the connecting metal fitting to the outer peripheral surface of the second rebar causes the pressing surface of the second die to abut on the claw portion, and then the first crimping mechanism is used to With the die and the second die, it is performed by pressing the connecting fitting in which the first reinforcing bar and the second reinforcing bar are fitted,
The reinforcing bar connecting method according to claim 6.
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JP2014001589A (en) * 2012-06-20 2014-01-09 Daiwa House Industry Co Ltd Binding clip, reinforcement unit and method for manufacturing reinforcement unit
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JP2014001589A (en) * 2012-06-20 2014-01-09 Daiwa House Industry Co Ltd Binding clip, reinforcement unit and method for manufacturing reinforcement unit
JP2014125731A (en) * 2012-12-25 2014-07-07 Okabe Co Ltd Slope frame form, method of installing slope frame form and reinforcing-bar support for slope frame form
JP3188340U (en) * 2013-10-30 2014-01-16 愛知スチール株式会社 Rebar fixing bracket and fixing structure
WO2015147415A1 (en) * 2014-03-24 2015-10-01 지엘기술 주식회사 Inner tie hoop fixing structure of reinforced concrete vertical member using tie hoop fixing clip or tie hoop fixing member
KR20150110280A (en) * 2014-03-24 2015-10-02 지엘기술주식회사 Configuration structure of internal ties for reinforced concrete members subjected to axial force and moment using tie install clip or tie member
KR20150110420A (en) * 2014-03-24 2015-10-02 지엘기술주식회사 Fixing device of tie bar, One-touch type tie bar and Fixing structure of tie bar for reinforced concrete member
KR101600007B1 (en) * 2014-03-24 2016-03-04 지엘기술주식회사 Configuration structure of internal ties for reinforced concrete members subjected to axial force and moment using tie install clip or tie member
KR101627834B1 (en) 2014-03-24 2016-06-07 지엘기술주식회사 Fixing device of tie bar, One-touch type tie bar and reinforced concrete member with tie bar
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CN105781115B (en) * 2014-03-24 2018-03-16 Gl技术 株式会社 The inside stirrup fixed structure of bar-reinforced concrete member
CN109577533A (en) * 2019-01-21 2019-04-05 沈阳建筑大学 Improved concealed beam formula connects full prefabricated board structure, production and assembly method

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