JP2011226144A - Joint metal fitting for segment - Google Patents

Joint metal fitting for segment Download PDF

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JP2011226144A
JP2011226144A JP2010096651A JP2010096651A JP2011226144A JP 2011226144 A JP2011226144 A JP 2011226144A JP 2010096651 A JP2010096651 A JP 2010096651A JP 2010096651 A JP2010096651 A JP 2010096651A JP 2011226144 A JP2011226144 A JP 2011226144A
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metal fitting
joint
screw portion
fitting body
anchor
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JP5432049B2 (en
JP2011226144A5 (en
Inventor
Daiki Yoneda
大樹 米田
Masashi Funahashi
政司 舟橋
Tatsuya Yasumitsu
立也 安光
Katsuharu Miyata
勝治 宮田
Takuto Kira
拓人 吉良
Yoshihiko Matsui
芳彦 松井
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Maeda Corp
Unytite Corp
Fujimi Koken Co Ltd
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Maeda Corp
Unytite Corp
Fujimi Koken Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a joint metal fitting having a reduced time and labor for work to produce and lower cost to produce.SOLUTION: A joint metal fitting 1 is provided in a jointing end face 11 of a concrete segment 10, the joint metal fitting 1 being for jointing the concrete segments 10 to each other. The joint metal fitting 1 includes a metal fitting body 2 in plate shape, which has a bolt insertion hole 4, and a plurality of anchor bars 3 to be fixed to the metal fitting body 2. A plurality of female screws 5 are provided extending in the thickness direction of the metal fitting body 2 in the metal fitting body 2, and a male screw 6 to be screwed to the female screw 5 is provided in the end of the anchor bar 3.

Description

本発明は、コンクリートセグメント同士を接合する継手金具に関する。   The present invention relates to a joint fitting for joining concrete segments together.

隣り合うコンクリートセグメントを互いに接合する際には、各コンクリートセグメントの接合端面に埋め込まれた継手金具同士を互いに向かい合わせ、これをボルト、ナット等の緊結具で緊結することにより行う。   When adjoining concrete segments are joined to each other, the fittings embedded in the joining end surfaces of the concrete segments are faced to each other and are fastened with fastening tools such as bolts and nuts.

このようなコンクリートセグメントの接合に用いられる継手金具は、平板状の継手板に板状のブラケットが直角に溶接され、かかるブラケットの面に対してアンカー筋の側面が溶接されることによって製造される。かかる構造の継手金具においては、ブラケットを介することでアンカー筋の溶接に対して十分な脚長を確保し、部材間の接続強度を高めている（例えば、特許文献１）。   A joint fitting used for joining such a concrete segment is manufactured by welding a plate-like bracket to a flat joint plate at a right angle and welding the side surface of the anchor bar to the surface of the bracket. . In the joint fitting having such a structure, a leg length sufficient for welding of the anchor bars is ensured through the bracket, and the connection strength between the members is increased (for example, Patent Document 1).

特開２００１−３２９７９４号公報JP 2001-329794 A

しかしながら、上記のような継手金具は、継手板、ブラケット及びアンカー筋の各部材を互いに溶接して製造するものであり、製造作業において作業手間がかかる上、製造コストが高いという問題がある。   However, the joint fitting as described above is manufactured by welding the members of the joint plate, the bracket, and the anchor bar to each other, and there is a problem that the manufacturing work is troublesome and the manufacturing cost is high.

そこで本発明は、製造作業において作業手間が少なく、且つ製造コストの低い継手金具を提供することを目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a joint fitting that requires less work in manufacturing operations and is low in manufacturing cost.

以上の課題を解決するため、本発明の一態様によれば、
コンクリートセグメントの接合端面に設けられ、コンクリートセグメント同士を接合させる継手金具であって、
ボルト挿通孔を有する平板状の金具本体と、
前記金具本体に取り付けられる複数のアンカー筋と、を備え、
前記金具本体には、前記金具本体の厚さ方向に延びる雌ネジ部が複数設けられ、
前記アンカー筋の端部には、前記雌ネジ部に螺合する雄ネジ部が設けられていることを特徴とする継手金具が提供される。 In order to solve the above problems, according to one aspect of the present invention,
It is a joint fitting that is provided on the joint end surface of the concrete segment and joins the concrete segments together,
A flat metal fitting body having bolt insertion holes;
A plurality of anchor bars attached to the metal fitting body,
The metal fitting body is provided with a plurality of female screw portions extending in the thickness direction of the metal fitting body,
A joint fitting is provided in which an end portion of the anchor bar is provided with a male screw portion that is screwed into the female screw portion.

上記継手金具において、好ましくは、前記雌ネジ部及び前記雄ネジ部はテーパー状に形成されている。
上記継手金具において、好ましくは、前記雄ネジ部の基端部には、塑性硬化処理が施されている。
上記継手金具において、好ましくは、前記雄ネジ部の長さは、前記アンカー筋の直径の１．０〜１．３倍である。
上記継手金具において、好ましくは、前記金具本体の板厚は、前記アンカー筋の直径の１．０〜１．５倍である。 In the joint fitting, preferably, the female screw portion and the male screw portion are formed in a tapered shape.
In the joint fitting, preferably, the base end portion of the male screw portion is subjected to plastic hardening treatment.
In the joint fitting, preferably, the length of the male screw portion is 1.0 to 1.3 times the diameter of the anchor muscle.
In the joint fitting, preferably, the thickness of the fitting main body is 1.0 to 1.5 times the diameter of the anchor bar.

本発明によれば、部材同士をネジで固定しているため、溶接作業を行う必要がなく作業手間がかからない。また、溶接作業が不要であることに加えて部材点数が少ないため、製造コストを低く抑えることができる。   According to the present invention, since the members are fixed to each other with screws, it is not necessary to perform a welding operation and labor is not required. Moreover, since the number of members is small in addition to the need for welding work, the manufacturing cost can be kept low.

継手金具の正面斜視図である。It is a front perspective view of a coupling metal fitting. 継手金具の背面斜視図である。It is a back perspective view of a coupling metal fitting. 継手金具の分解上面図であり、一部断面を示す図である。It is an exploded top view of a joint metal fitting, and is a figure showing a partial section. 継手金具を用いたコンクリートセグメントの斜視図である。It is a perspective view of a concrete segment using a joint metal fitting.

以下に、本発明を実施するための形態について図面を用いて説明する。ただし、以下に述べる実施形態には、本発明を実施するために技術的に好ましい種々の限定が付されているが、発明の範囲を以下の実施形態及び図示例に限定するものではない。   EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

図１は本実施形態に係る継手金具１の正面斜視図であり、図２は継手金具１の背面斜視図であり、図３は継手金具１の分解上面図であってその一部を断面で図示している。本実施形態に係る継手金具１は、図１〜図３に示すように、金具本体２と、該金具本体２の一方の面に取り付けられた４本のアンカー筋３と、を備える。   FIG. 1 is a front perspective view of a joint fitting 1 according to the present embodiment, FIG. 2 is a rear perspective view of the joint fitting 1, and FIG. 3 is an exploded top view of the joint fitting 1 with a part thereof in cross section. It is shown. As shown in FIGS. 1 to 3, the joint fitting 1 according to the present embodiment includes a fitting body 2 and four anchor bars 3 attached to one surface of the fitting body 2.

金具本体２は、矩形平面状に形成された金属板であり、その中央部には板厚方向に貫通する円形のボルト挿通孔４が形成されている。また図１及び図３に示すように、金具本体２のボルト挿通孔４の周囲には、板厚方向に貫通する４つの雌ネジ部５が形成され、各雌ネジ部５は背面側から正面側にかけて径が小さくなるテーパー状に形成されている。なお、金具本体２は矩形状でなくともよく、雌ネジ部５は金具本体２を貫通していなくてもよい。   The metal fitting body 2 is a metal plate formed in a rectangular flat shape, and a circular bolt insertion hole 4 penetrating in the plate thickness direction is formed in the central portion thereof. As shown in FIGS. 1 and 3, four female screw portions 5 penetrating in the plate thickness direction are formed around the bolt insertion hole 4 of the metal fitting body 2, and each female screw portion 5 is front-facing from the back side. It is formed in a tapered shape whose diameter decreases toward the side. The metal fitting body 2 may not be rectangular, and the female screw portion 5 may not penetrate the metal fitting body 2.

アンカー筋３は異径鉄筋であり、図３に示すように、その一端部には雄ネジ部６が形成されている。４本のアンカー筋３の雄ネジ部６が金具本体２に形成された４つの雌ネジ部５にそれぞれ背面側から螺合することで、アンカー筋３が金具本体２に取り付けられている。なお、金具本体２に取り付けられるアンカー筋３の本数は４本に限られるものではなく、１〜３本であってもよいし５本以上であってもよい。また、その場合にはアンカー筋３の本数と同数の雌ネジ部５が金具本体２に形成されているものとする。   The anchor bars 3 are different diameter reinforcing bars, and a male screw part 6 is formed at one end thereof as shown in FIG. The anchor threads 3 are attached to the metal fitting body 2 by screwing the male screw portions 6 of the four anchor muscles 3 into the four female screw portions 5 formed on the metal fitting body 2 from the back side. The number of anchor bars 3 attached to the metal fitting body 2 is not limited to four, and may be 1 to 3, or 5 or more. In this case, it is assumed that the same number of female thread portions 5 as the number of anchor bars 3 are formed in the metal fitting body 2.

図３に示すように、アンカー筋３の雄ネジ部６は先端に向けて先細るテーパー状に形成されており、その傾斜角度は金具本体２の雌ネジ部５の傾斜角度に応じて形成されている。そして、雄ネジ部６の基端部７には塑性硬化処理が施されている。具体的には、基端部７を挟み込むように治具を取り付け、治具をプレス機で挟み付けて圧力をかけることにより行う。このように、アンカー筋３のうち基端部７のみに塑性硬化処理を施し、雄ネジ部６をテーパー状に形成することにより、金具本体２とアンカー筋３との間における応力の伝達が円滑なものとなり、雄ネジ部６が弱点とならずにアンカー筋３を強固に固定することができる。
なお、塑性硬化処理に用いるプレス機は一般的に普及している公知のプレス機を用いることができる。また、雄ネジ部６は、基端部７の塑性硬化処理後に旋盤等の公知の切削機を用いて形成する。 As shown in FIG. 3, the male threaded portion 6 of the anchor bar 3 is formed in a tapered shape that tapers toward the tip, and the inclination angle thereof is formed in accordance with the inclination angle of the female threaded portion 5 of the metal fitting body 2. ing. The base end portion 7 of the male screw portion 6 is subjected to plastic hardening treatment. Specifically, a jig is attached so as to sandwich the base end portion 7, and the jig is sandwiched by a press to apply pressure. As described above, only the base end portion 7 of the anchor bar 3 is subjected to plastic hardening, and the male screw part 6 is formed in a tapered shape, so that the transmission of stress between the metal fitting body 2 and the anchor bar 3 is smooth. Thus, the anchor thread 3 can be firmly fixed without the male screw portion 6 becoming a weak point.
In addition, the press machine used for a plastic hardening process can use the publicly known well-known press machine. The male screw portion 6 is formed by using a known cutting machine such as a lathe after the base end portion 7 is plastic-cured.

好ましくは、金具本体２の板厚がアンカー筋３の直径の１．０倍〜１．５倍に設定され、アンカー筋３の雄ネジ部６の長さがアンカー筋３の直径の１．０〜１．３倍に設定されている。
金具本体２の板厚及び雄ネジ部６の長さが上記範囲に設定されていることにより、金具本体２とアンカー筋３との接続部の機械的性質が安定し、接続部の引っ張り強さがアンカー筋３の引っ張り強さを上回る構造となる。なお、金具本体２の板厚は、大きくすればするほど接続部の強度が高まるが、板厚を大きくすると製造コストも向上するためアンカー筋３の直径の１．５倍を上限としている。 Preferably, the plate thickness of the metal fitting body 2 is set to 1.0 to 1.5 times the diameter of the anchor bar 3, and the length of the male screw portion 6 of the anchor bar 3 is 1.0 of the diameter of the anchor bar 3. It is set to -1.3 times.
By setting the plate thickness of the metal fitting body 2 and the length of the male screw portion 6 within the above ranges, the mechanical properties of the connection portion between the metal fitting body 2 and the anchor bar 3 are stabilized, and the tensile strength of the connection portion is increased. However, the structure exceeds the tensile strength of the anchor muscle 3. As the plate thickness of the metal fitting body 2 is increased, the strength of the connection portion is increased. However, since the manufacturing cost is improved when the plate thickness is increased, the upper limit is 1.5 times the diameter of the anchor bar 3.

図４は、本実施形態における継手金具１を設けたコンクリートセグメント１０の斜視図である。
コンクリートセグメント１０の各接合端面１１には継手金具１が予め埋め込まれ、接合端面１１から継手金具１の金具本体２が露出している。この金具本体２の正面側と接合端面１１は面一になっている。そして、コンクリートセグメント１０の内周面１２の周縁部分のうち継手金具１の近傍の位置に開口部１３が形成され、開口部１３から金具本体２の背面中央部が露出している。つまり開口部１３からボルト挿通孔４が露出しており、ボルト挿通孔４にボルトを挿通する作業を行うことが可能になっている。 FIG. 4 is a perspective view of the concrete segment 10 provided with the joint fitting 1 in the present embodiment.
The fitting 1 is embedded in each joint end face 11 of the concrete segment 10 in advance, and the fitting body 2 of the joint fitting 1 is exposed from the joint end face 11. The front surface side of the metal fitting body 2 and the joint end surface 11 are flush with each other. And the opening part 13 is formed in the position of the peripheral part of the internal peripheral surface 12 of the concrete segment 10 in the vicinity of the coupling metal fitting 1, and the back center part of the metal fitting main body 2 is exposed from the opening part 13. FIG. That is, the bolt insertion hole 4 is exposed from the opening 13, and the operation of inserting the bolt into the bolt insertion hole 4 can be performed.

このコンクリートセグメント１０同士の接合方法について説明すると、まず、２つのコンクリートセグメント１０をその接合端面１１同士が対向するように配置する。続いて接合端面１１から露出した金具本体２同士を当接させる。そして、開口部１３から露出した当該金具本体２同士の２つのボルト挿通孔４にボルトを挿通しナットで緊結する。これにより２つのコンクリートセグメント１０が接合される。
つまり、本実施形態の継手金具１によれば従来の継手金具を用いた場合と同様のコンクリートセグメントの接合作業を行うことができる。 The joining method of the concrete segments 10 will be described. First, the two concrete segments 10 are arranged so that the joining end faces 11 face each other. Subsequently, the metal fitting bodies 2 exposed from the joint end face 11 are brought into contact with each other. Then, a bolt is inserted into the two bolt insertion holes 4 of the metal fitting bodies 2 exposed from the opening 13 and fastened with a nut. Thereby, the two concrete segments 10 are joined.
That is, according to the joint metal fitting 1 of this embodiment, the same concrete segment joining operation as the case where the conventional joint metal fitting is used can be performed.

本実施形態の作用効果について説明する。
実施形態によれば、金具本体２に形成された雌ネジ部５に、アンカー筋３の先端に形成された雄ネジ部６を螺合することにより、溶接作業を行うことなく金具本体２に対してアンカー筋３を容易に取り付けることができる。溶接作業を行うことなくアンカー筋３を取り付けられるため、継手金具１の製造において作業手間がかからない上、製造コストを低く抑えることができる。また、アンカー筋３を溶接でなくネジで取り付けているため、完成品ごとのばらつきが生じにくく、一定の品質で継手金具１を製造できる。そして、アンカー筋３を金具本体２に対して直接取り付けていることにより、ブラケットを省略することができ、これにより製造コストを更に低く抑えることができる。 The effect of this embodiment is demonstrated.
According to the embodiment, the male screw portion 6 formed at the tip of the anchor bar 3 is screwed into the female screw portion 5 formed in the metal fitting body 2, so that the metal fitting body 2 can be attached to the metal fitting body 2 without performing a welding operation. Thus, the anchor muscle 3 can be easily attached. Since the anchor bars 3 can be attached without performing the welding operation, it is possible to reduce the manufacturing cost while not requiring labor in the manufacture of the joint fitting 1. Further, since the anchor bars 3 are attached not by welding but by screws, variations in the finished products are unlikely to occur, and the fitting 1 can be manufactured with a certain quality. And by attaching the anchor reinforcement 3 directly with respect to the metal fitting main body 2, a bracket can be abbreviate | omitted and, thereby, manufacturing cost can be held down further.

また、雌ネジ部５及び雄ネジ部６がテーパー状に形成され、雄ネジ部６の基端部７に塑性硬化処理が施されていることにより、金具本体２とアンカー筋３との間における応力の伝達が円滑なものとなり、雄ネジ部６が弱点とならず金具本体２に対してアンカー筋３を強固に固定することができる。更に、金具本体２の板厚がアンカー筋３の直径の１．０倍〜１．５倍、アンカー筋３の雄ネジ部６の長さがアンカー筋３の直径の１．０〜１．３倍に設定されていることにより、金具本体２とアンカー筋３との接続部の機械的性質が安定し、接続部の引っ張り強さがアンカー筋３の引っ張り強さを上回る構造とすることができる。このように、アンカー筋３と金具本体２の接続部の強度が高くなっているため、従来の継手金具と同等の強度を発揮することができる。   Further, the female screw portion 5 and the male screw portion 6 are formed in a tapered shape, and the base end portion 7 of the male screw portion 6 is subjected to plastic hardening treatment, so that the space between the metal fitting body 2 and the anchor bar 3 is increased. The stress can be transmitted smoothly, and the anchor thread 3 can be firmly fixed to the metal fitting body 2 without the male screw portion 6 becoming a weak point. Further, the plate thickness of the metal fitting body 2 is 1.0 to 1.5 times the diameter of the anchor bar 3, and the length of the male screw portion 6 of the anchor bar 3 is 1.0 to 1.3 of the diameter of the anchor bar 3. By setting it twice, the mechanical property of the connection part of the metal fitting body 2 and the anchor bar 3 is stabilized, and the tensile strength of the connection part can exceed the tensile strength of the anchor bar 3. . Thus, since the strength of the connecting portion between the anchor bar 3 and the metal fitting body 2 is high, the strength equivalent to that of the conventional joint metal fitting can be exhibited.

なお、本発明に係る継手金具は、コンクリートセグメント以外のコンクリート構造物にも適用可能である。   The joint fitting according to the present invention can also be applied to a concrete structure other than a concrete segment.

１ 継手金具
２ 金具本体
３ アンカー筋
４ ボルト挿通孔
５ 雌ネジ部
６ 雄ネジ部
７ 基端部
１０ コンクリートセグメント
１１ 接合端面 DESCRIPTION OF SYMBOLS 1 Joint metal fitting 2 Metal fitting body 3 Anchor bar | burr 4 Bolt penetration hole 5 Female thread part 6 Male thread part 7 Base end part 10 Concrete segment 11 Joining end surface

Claims (5)

コンクリートセグメントの接合端面に設けられ、コンクリートセグメント同士を接合させる継手金具であって、
ボルト挿通孔を有する平板状の金具本体と、
前記金具本体に取り付けられる複数のアンカー筋と、を備え、
前記金具本体には、前記金具本体の厚さ方向に延びる雌ネジ部が複数設けられ、
前記アンカー筋の端部には、前記雌ネジ部に螺合する雄ネジ部が設けられていることを特徴とする継手金具。 It is a joint fitting that is provided on the joint end surface of the concrete segment and joins the concrete segments together,
A flat metal fitting body having bolt insertion holes;
A plurality of anchor bars attached to the metal fitting body,
The metal fitting body is provided with a plurality of female screw portions extending in the thickness direction of the metal fitting body,
A joint fitting, wherein an end portion of the anchor bar is provided with a male screw portion that is screwed into the female screw portion. 前記雌ネジ部及び前記雄ネジ部はテーパー状に形成されていることを特徴とする請求項１に記載の継手金具。   The joint fitting according to claim 1, wherein the female screw portion and the male screw portion are formed in a tapered shape. 前記雄ネジ部の基端部には、塑性硬化処理が施されていることを特徴とする請求項１又は２に記載の継手金具。   The joint fitting according to claim 1 or 2, wherein a plastic hardening treatment is applied to a base end portion of the male screw portion. 前記雄ネジ部の長さは、前記アンカー筋の直径の１．０〜１．３倍であることを特徴とする請求項１から３の何れか一項に記載の継手金具。   4. The fitting according to claim 1, wherein a length of the male screw portion is 1.0 to 1.3 times a diameter of the anchor bar. 5. 前記金具本体の板厚は、前記アンカー筋の直径の１．０〜１．５倍であることを特徴とする請求項１から４の何れか一項に記載の継手金具。   The thickness of the said metal fitting main body is 1.0 to 1.5 times the diameter of the said anchor reinforcement, The coupling metal fitting as described in any one of Claim 1 to 4 characterized by the above-mentioned.
JP2010096651A 2010-04-20 2010-04-20 Joint fittings for concrete structures Active JP5432049B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3028812U (en) * 1996-03-07 1996-09-13 近畿コンクリート工業株式会社 Segment fitting
JP2005194813A (en) * 2004-01-09 2005-07-21 Kubota Corp Connecting metal fitting for concrete segment
JP2009293267A (en) * 2008-06-05 2009-12-17 Maeda Corp Reinforcement anchoring structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3028812U (en) * 1996-03-07 1996-09-13 近畿コンクリート工業株式会社 Segment fitting
JP2005194813A (en) * 2004-01-09 2005-07-21 Kubota Corp Connecting metal fitting for concrete segment
JP2009293267A (en) * 2008-06-05 2009-12-17 Maeda Corp Reinforcement anchoring structure

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