JP2019065678A - Shear reinforcement steel bar - Google Patents
Shear reinforcement steel bar Download PDFInfo
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- JP2019065678A JP2019065678A JP2017195320A JP2017195320A JP2019065678A JP 2019065678 A JP2019065678 A JP 2019065678A JP 2017195320 A JP2017195320 A JP 2017195320A JP 2017195320 A JP2017195320 A JP 2017195320A JP 2019065678 A JP2019065678 A JP 2019065678A
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- main
- bar
- bars
- distribution
- shear reinforcing
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- 229910001294 Reinforcing steel Inorganic materials 0.000 title abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 210000003205 muscle Anatomy 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 abstract description 13
- 239000004567 concrete Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
Description
本発明は、主筋又は配力筋間を連結するせん断補強鉄筋に関するものである。 The present invention relates to a shear reinforcing bar connecting between main bars or distribution bars.
鉄筋コンクリート構造では、コンクリート内に主筋（軸方向鉄筋）や配力筋（軸方向鉄筋と直角の向きの鉄筋）を配筋すると共に、必要に応じて強度を増大するため主筋や配力筋と交差する方向に主筋等の間を連結するせん断補強鉄筋を配筋する必要がある。従来のせん断補強鉄筋において、特許文献１に示すように、鋼棒の端部に掛止板を固定し、前記主筋又は配力筋に掛止するものがあった。 In a reinforced concrete structure, main bars (axial rebars) and distribution bars (rebars oriented perpendicular to the axial rebars) are arranged in the concrete, and the strength is increased as necessary to cross the main bars and distribution bars It is necessary to arrange shear reinforcement bars connecting between the main bars etc. in the direction of In the conventional shear reinforcing bars, as shown in Patent Document 1, there is a structure in which a hooking plate is fixed to an end of a steel rod and hooked to the main bar or the distribution bar.
しかしながら、前記のようなせん断補強鉄筋において、コンクリート打設時に振動やコンクリートに押されることによって跳ね上がって主筋又は配力筋から外れてしまう虞があるため、主筋又は配力筋とせん断補強鉄筋を例えば針金等で結束する必要があり、結束作業の手間を要し、施工効率が悪くなる問題があった。 However, in the above-described shear reinforcing bars, there is a possibility that they may jump up and be separated from the main bars or the distribution bars by being pushed by vibration or concrete at the time of placing concrete. There is a problem that it is necessary to bind with a wire or the like, which takes time and effort for the binding operation, and the construction efficiency is deteriorated.
本発明は前記実情を鑑みたものであり、主筋又は配力筋間の連結強度が高まり、なおかつ作業性においても施工効率が飛躍的に向上するせん断補強鉄筋を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shear reinforcing bar in which connection strength between main bars or distribution bars is enhanced and construction efficiency is dramatically improved also in workability.
本発明のせん断補強鉄筋は、並設した二本の主筋又は配力筋間を連結するせん断補強鉄筋において、鋼棒と、掛止板と、突起状の外れ止め部材を備え、掛止板は、鋼棒の少なくとも一端に前記主筋又は配力筋に掛止するために固定され、前記掛止板における、主筋又は配力筋の固定される位置の下方には、主筋又は配力筋の外れ止め部材を設けることを特徴とする。 The shear reinforcing bar according to the present invention is a shear reinforcing bar connecting two main bars or distribution bars arranged side by side, which comprises a steel rod, a hooking plate, and a projection-like locking member, and the hooking plate And at least one end of the steel rod is fixed to be engaged with the main bar or the distribution bar, and below the fixed position of the main bar or the distribution bar in the locking plate, the main bar or the distribution bar It is characterized by providing a stop member.
前記の構成に加えて請求項２に記載の通り、前記外れ止め部材が、円柱形の棒材または球体からなることを特徴とする。 According to a second aspect of the present invention, in addition to the above-mentioned configuration, the anti-slip member is formed of a cylindrical rod or sphere.
請求項１に記載の発明によれば、掛止板の下部に突起状の外れ止め部材を設けたことで、前記掛止板はいったん主筋又は配力筋に掛止すると、外れ止め部材が主筋又は配力筋に引っ掛かるので、従来工法のようにコンクリート打設時に、せん断補強鉄筋が振動やコンクリートに押されることによって跳ね上がって主筋から外れてしまうことがなくなる。その結果、主筋又は配力筋と掛止板の前記結束作業が不要となるので、作業性が向上するため、工期の短縮及びコストダウンが可能となる。 According to the first aspect of the present invention, by providing the protrusion-like detent member at the lower part of the retaining plate, the detent member serves as the main muscle once the retaining plate is latched to the main bar or the distribution bar. Alternatively, since the steel reinforcement bars are caught, it is possible to prevent the shear reinforcing bars from jumping up and coming off from the main bars by vibration or being pushed by the concrete at the time of putting concrete as in the conventional construction method. As a result, since the binding work of the main bars or the distribution bars and the retaining plate is not necessary, the workability is improved, and the construction period can be shortened and the cost can be reduced.
また、外れ止め部材が主筋又は配力筋に掛止していることにより、コンクリート打設後においてもせん断補強鉄筋が主筋又は配力筋から外れ難くなるので、施工後の配筋強度が増大し、より堅牢な構造物の構築への寄与が期待できる。 In addition, since the shear reinforcing bars are less likely to come off from the main bars or the distribution bars after concrete placement, as the detachment prevention member is hooked to the main bars or the distribution bars, the reinforcement strength after construction increases. It can be expected to contribute to the construction of more robust structures.
また、請求項２記載の発明によれば、前記請求項１に記載の効果に加えて、外れ止め部材を円柱形の棒材または球体で構成することにより、せん断補強鉄筋を主筋又は配力筋に取り付ける際に、外れ止め部材の形状が曲面状を有しているため、外れ止め部材が主筋又は配力筋に干渉することなく、掛止板がスムーズに定位置に固定される。そのため、取り付け作業が効率的となり、作業性が良くなる。 Further, according to the second aspect of the invention, in addition to the effect of the first aspect, the shear reinforcing bar can be a main rebar or a distribution rebar by forming the detent member with a cylindrical rod or sphere. Since the shape of the detent member has a curved shape when attached to the hook, the retaining plate is smoothly fixed in place without the detent member interfering with the main bars or the distribution bars. Therefore, the mounting work becomes efficient and the workability is improved.
以下、本発明の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described based on the drawings.
図１に示すように、本発明のせん断補強鉄筋は、鋼棒１と、掛止板２と、曲面状の形状を有する外れ止め部材３で構成される。 As shown in FIG. 1, the shear reinforcing bar of the present invention is constituted of a steel rod 1, a hooking plate 2 and a detent member 3 having a curved surface shape.
前記鋼棒１は、主筋４又は配力筋間を連結して補強するためのものであって、一端がフック状であり、他端には、主筋４又は配力筋にせん断補強鉄筋を掛止するための掛止板２が固定される。なお、他の実施例として、図２（ｂ）に示すように、鋼棒１の両端に掛止板２が固定されていてもよい。 The steel rod 1 is for connecting and reinforcing the main bars 4 or the distribution bars, and one end thereof is hook-shaped, and at the other end, a shear reinforcement bar is attached to the main bars 4 or the distribution bars. A locking plate 2 for locking is fixed. In addition, as shown in FIG.2 (b), the latching board 2 may be fixed to the both ends of the steel bar 1 as another Example.
鉄板からなる前記掛止板２は、図３に示すように、鋼棒１の一端または両端において、鋼棒１に対してほぼ垂直な方向に、摩擦圧接によって固定される。せん断補強鉄筋は、図２に示すように、掛止板２により、前記主筋４に掛止される。 The hooking plate 2 made of an iron plate is fixed by friction welding at one end or both ends of the steel rod 1 in a direction substantially perpendicular to the steel rod 1, as shown in FIG. As shown in FIG. 2, the shear reinforcing bars are hooked to the main bar 4 by the hooking plate 2.
前記掛止板２には、円柱形の棒材からなる前記外れ止め部材３が設けてある。前記外れ止め部材３は、図２に示すように、鋼棒１に対してほぼ直交する方向かつ、主筋４に対してほぼ平行となる方向において、主筋４の固定される位置（図３（ｂ）における主筋又は配力筋固定位置５）の下方に溶接してある。なお、外れ止め部材３の長さは、図２に示す掛止板２の全幅に渡るものでなくてもよく、掛止板２の幅の一部であってもよい。 The retaining plate 2 is provided with the detent member 3 formed of a cylindrical bar. As shown in FIG. 2, in the direction substantially orthogonal to the steel rod 1 and the direction substantially parallel to the main bar 4, the anti-slip member 3 is fixed to the main bar 4 (FIG. 3 (b It is welded to the lower part of the main bar or the distribution muscle fixing position 5) in. The length of the detent member 3 may not be the entire width of the retaining plate 2 shown in FIG. 2, and may be a part of the width of the retaining plate 2.
前記外れ止め部材３を備えることにより、従来の外れ止め部材３を持たない構成とは異なり、掛止板２がいったん主筋４に掛止した後に主筋４から外れ難くなる。このため、従来工法においてはコンクリート打設時に、せん断補強鉄筋が振動やコンクリートに押されることによって跳ね上がり主筋４から外れてしまうことを防ぐために必要であった、主筋４とせん断補強鉄筋を針金等で結束する工程が不要となる。その結果、施工が効率化され、工期を短縮できる。 By providing the anti-slip member 3, unlike the conventional configuration in which the anti-slip member 3 is not provided, it becomes difficult for the retaining plate 2 to be detached from the main bar 4 once it is latched on the main bar 4. For this reason, in the conventional construction method, at the time of putting concrete, it is necessary to prevent the shear reinforcing bar from jumping off from the main bar 4 by vibration or being pushed by the concrete at the time of placing concrete. The process of binding is not necessary. As a result, the construction can be streamlined and the construction period can be shortened.
加えて、前記外れ止め部材３が主筋４に掛止していることにより、コンクリート打設後においてもせん断補強鉄筋が主筋４から外れ難くなるので、施工後の配筋強度が増大し、より堅牢な構造物の構築への寄与が期待できる。 In addition, since the shear reinforcing bars do not easily come off from the main bar 4 even after concrete placement, as the detent member 3 is hooked to the main bar 4, the reinforcement strength after construction increases, which is more robust. It can be expected to contribute to the construction of various structures.
また、前記外れ止め部材３の形状を円柱形とすることで、外れ止め部材３の形状が曲面状を有しているため、掛止板２を主筋４へ取り付ける際に、外れ止め部材３が主筋４と干渉することなく滑るように主筋４を乗り越えるので、掛止板２がスムーズに定位置に固定される。そのため、施工が容易となり、作業性が良くなる。 In addition, since the shape of the detent member 3 has a curved shape by making the shape of the detent member 3 cylindrical, when the retaining plate 2 is attached to the main bar 4, the detent member 3 is Since the main bar 4 is slipped over so as not to interfere with the main bar 4, the retaining plate 2 is smoothly fixed in place. Therefore, the construction is easy and the workability is improved.
ここで、配筋済みの主筋４に対し、本発明のせん断補強鉄筋を取り付ける方法を述べる。 Here, a method of attaching the shear reinforcing bar of the present invention to the reamed main bar 4 will be described.
まず、せん断補強鉄筋の一端の形状がフック状である場合を、図２（ａ）を用いて説明する。初めに、並設された２本の主筋４のうち一方の主筋４に、フック部６を引っ掛ける。この時、せん断補強鉄筋の上下方向の向きは、外れ止め部材３が下側となるようにする。次に、他方の主筋４に対し、掛止板２を上方から被せるように配設する。その際、外れ止め部材３は、上から下へ滑るように主筋４を乗り越えるので、掛止板２はスムーズに定位置に至る。その結果、主筋４は図３（ｂ）に示す、主筋又は配力筋固定位置５に収まる。その後、配筋済みの主筋４およびせん断補強鉄筋に対して、コンクリートを打設する。 First, the case where the shape of one end of the shear reinforcing bar is hook-like will be described using FIG. 2 (a). First, the hook portion 6 is hooked on one of the two main bars 4 arranged side by side. At this time, the vertical direction of the shear reinforcing bar is set so that the detent member 3 is on the lower side. Next, the retaining plate 2 is disposed to cover the other main reinforcement 4 from above. At that time, since the detent member 3 passes over the main bar 4 so as to slide downward from above, the retaining plate 2 smoothly reaches the fixed position. As a result, the main muscle 4 fits in the main muscle or distribution muscle fixing position 5 shown in FIG. 3 (b). After that, concrete is placed on the rebar 4 and the shear reinforcing bars already arranged.
なお、図２（ｂ）に示す、せん断補強鉄筋の両端に掛止板２を備える場合には、初めに一方の掛止板２を上記と同様に、主筋４に対してその上方から被せるように配設し、次に他方の掛止板２についても同様に、他方の主筋４に対して配設する。その後、コンクリートを上記と同様に打設する。 In addition, when providing the stop plate 2 in the both ends of a shear reinforcement bar shown in FIG.2 (b), it is made to cover one main stop plate 4 from the upper direction with respect to the main bar 4 similarly to the above similarly to the above. Then, the other retaining plate 2 is similarly disposed to the other main reinforcement 4. After that, cast concrete in the same manner as above.
本発明は、上記の実施形態に限定されない。例えば外れ止め部材３の形状は、円柱形に限定されるものではなく、図４に示すように球状のものを複数個、鋼棒１とほぼ直交する方向かつ、主筋４に対してほぼ平行となる方向において、直線上に連続して配設してもよい。また、鋼棒１の一端のみに掛止板２を設ける場合、鋼棒１の他端部の形状は、フック状に限定されず、他の形状であってもよい。 The present invention is not limited to the above embodiments. For example, the shape of the detent member 3 is not limited to a cylindrical shape, and a plurality of spherical members as shown in FIG. 4 are in a direction substantially orthogonal to the steel rod 1 and substantially parallel to the main bar 4 It may be arranged in a straight line in the direction Moreover, when providing the latching board 2 only in the end of the steel rod 1, the shape of the other end part of the steel rod 1 is not limited to a hook shape, Another shape may be sufficient.
１鋼棒
２掛止板
３外れ止め部材
４主筋
５主筋又は配力筋固定位置
６フック部
1 steel rod
2 stop board
3 Release prevention member
4 main lines
5 main muscle or distribution muscle fixed position
6 hook section
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017195320A JP2019065678A (en) | 2017-10-05 | 2017-10-05 | Shear reinforcement steel bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017195320A JP2019065678A (en) | 2017-10-05 | 2017-10-05 | Shear reinforcement steel bar |
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|---|---|
| JP2019065678A true JP2019065678A (en) | 2019-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017195320A Pending JP2019065678A (en) | 2017-10-05 | 2017-10-05 | Shear reinforcement steel bar |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10196120A (en) * | 1996-11-13 | 1998-07-28 | Taisei Corp | Shear reinforcing bar and its connection method |
| JP2002242369A (en) * | 2001-02-22 | 2002-08-28 | Kajima Corp | Reinforcement anchorage device, method for producing the same, and concrete structure |
| JP2004249643A (en) * | 2003-02-21 | 2004-09-09 | Kajima Corp | Fixing method of reinforcing bar, forming device of fixing part and reinforcing bar with fixing plate |
| JP2005042425A (en) * | 2003-07-23 | 2005-02-17 | Kajima Corp | Horizontal restraining reinforcement material for reinforced concrete structure |
| KR20060037112A (en) * | 2004-10-27 | 2006-05-03 | 제이에프이 코켄 가부시키가이샤 | Welding device, welding method and production method of a shear reinforcing bar |
-
2017
- 2017-10-05 JP JP2017195320A patent/JP2019065678A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10196120A (en) * | 1996-11-13 | 1998-07-28 | Taisei Corp | Shear reinforcing bar and its connection method |
| JP2002242369A (en) * | 2001-02-22 | 2002-08-28 | Kajima Corp | Reinforcement anchorage device, method for producing the same, and concrete structure |
| JP2004249643A (en) * | 2003-02-21 | 2004-09-09 | Kajima Corp | Fixing method of reinforcing bar, forming device of fixing part and reinforcing bar with fixing plate |
| JP2005042425A (en) * | 2003-07-23 | 2005-02-17 | Kajima Corp | Horizontal restraining reinforcement material for reinforced concrete structure |
| KR20060037112A (en) * | 2004-10-27 | 2006-05-03 | 제이에프이 코켄 가부시키가이샤 | Welding device, welding method and production method of a shear reinforcing bar |
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