JP7324507B2 - Concrete products and their connecting fittings - Google Patents

Concrete products and their connecting fittings Download PDF

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JP7324507B2
JP7324507B2 JP2020062364A JP2020062364A JP7324507B2 JP 7324507 B2 JP7324507 B2 JP 7324507B2 JP 2020062364 A JP2020062364 A JP 2020062364A JP 2020062364 A JP2020062364 A JP 2020062364A JP 7324507 B2 JP7324507 B2 JP 7324507B2
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源基 勝野
悟 坂井
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昭和コンクリート工業株式会社
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Description

本発明は、擁壁用ブロック等のコンクリート製品及びその連結金具に関するものである。 TECHNICAL FIELD The present invention relates to a concrete product such as a retaining wall block and a connecting fitting therefor.

擁壁用ブロック等のコンクリート製品の連結金具として、連結ボルトを通す本体部と、本体部に結合されてコンクリートに埋め込まれることで連結金具の抜けを防止するアンカー部とを含む連結金具が広く用いられている。 As connecting metal fittings for concrete products such as blocks for retaining walls, connecting metal fittings are widely used that include a main body through which connecting bolts are passed and anchor parts that are combined with the main body and embedded in concrete to prevent the connecting metal fittings from coming off. It is

特許文献1には、鋳鉄製の金具本体の両端部に接合面を設け、接合面にアンカー筋を溶接してなる継手金具が開示されている。アンカー筋がコンクリートに埋め込まれることで、継手金具の抜けを防止する。 Patent Literature 1 discloses a metal joint formed by providing joint surfaces at both end portions of a metal fitting body made of cast iron and welding anchor bars to the joint surfaces. By embedding the anchor bar in the concrete, the fitting is prevented from coming off.

特許文献2には、鋼製の帯板材によるヨーク部と、ヨーク部の両端に溶接した異形鉄筋によるアンカー部とからなる接続部材が開示されている。ヨーク部は、2枚のプレート部を、空所を囲むようにプレス加工して、一体化し、長円状の空所を接続ボルトの差し込み口(ルーズホール)としたものである。該一体化により接続部材の断面係数が向上し、ルーズホールにより部材同士の位置ずれを吸収できるとされている。 Patent Literature 2 discloses a connection member comprising a yoke portion made of a steel strip material and anchor portions made of deformed reinforcing bars welded to both ends of the yoke portion. The yoke portion is formed by pressing two plate portions so as to surround a space and integrating them, and the oval space serves as an insertion port (loose hole) for a connecting bolt. It is said that the integration improves the section modulus of the connection member, and the loose hole can absorb the positional deviation between the members.

これら特許文献1,2のように、本体部にアンカー部(異形鉄筋)を溶接したものは、本体部とアンカー部とが分離しないように、アンカー部の両脇を線状に溶接する必要があるため溶接作業に非常に手間がかかり、コストが高くなるという問題がある。 As in these Patent Documents 1 and 2, in which the anchor portion (deformed reinforcing bar) is welded to the main body portion, it is necessary to linearly weld both sides of the anchor portion so that the main portion and the anchor portion are not separated. Therefore, there is a problem that the welding work is very troublesome and the cost is high.

特許文献3には、基部及び両袖片を有するコ字状で、基部にボルト孔が穿たれ、両袖片に凹凸部が形成されかつアンカー棒の挿通穴が穿たれてなる接続用金物が開示されている。凹凸部と、挿通されたアンカー棒が、金具の抜けを防止する。 In Patent Document 3, there is provided a connecting hardware having a U-shape having a base and both sleeves, a bolt hole being drilled in the base, uneven portions being formed in both sleeves, and insertion holes for anchor rods being drilled. disclosed. The uneven part and the anchor rod inserted prevent the fitting from coming off.

特許文献4には、フランジ部と、フランジ部の縁からアール部を介して起立した補強リブ部と、補強リブ部から延出した二本のアーム部とが、鋳造又は曲げ加工により一体形成されてなる接合金具が記載されている。 In Patent Document 4, a flange portion, a reinforcing rib portion erected from the edge of the flange portion via a rounded portion, and two arm portions extending from the reinforcing rib portion are integrally formed by casting or bending. A joint fitting is described.

これら特許文献3,4のように、本体部とアンカー部とが一体形成されたものは、溶接の手間がかからず、コストが低くなるという利点がある。しかし、これらの本体部は、耐力性能が不足する可能性がある。 As in these Patent Documents 3 and 4, the body portion and the anchor portion are integrally formed, and there is an advantage that the welding work is not required and the cost is low. However, these bodies may lack load-bearing performance.

特開2005-320807号公報JP-A-2005-320807 特開2013-181297号公報JP 2013-181297 A 実開平5-38042号公報Japanese Utility Model Laid-Open No. 5-38042 特開平10-280526号公報JP-A-10-280526

そこで、本発明の目的は、製造時の溶接作業を減らし、コストを削減できるとともに、耐力性能に優れたコンクリート製品の連結金具を得ることにある。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a connecting fitting for concrete products which can reduce the welding work in the manufacturing process, reduce the cost, and has excellent load-bearing performance.

[1]連結金具
ボルト差込穴が形成された矩形状の接合板部と、接合板部の第1対辺から曲がって接合板部の背方向へ延出する二つのアンカー板部とからなる、一枚の鋼板よりなる本体プレートと、
接合板部を補強するための、帯状鋼板がW形に湾曲した二枚の補強プレートとを含み、
二枚の補強プレートは、W形の湾曲部が2つある側どうしを合わせることにより帯長方向中央部にボルト挿通穴が形成され且つ帯長方向両端部に離間部が形成された状態で、帯幅方向が接合板部の背方向となり且つ帯長方向が接合板部の第2対辺方向となり且つボルト挿通穴がボルト差込穴に合致するように接合板部の背面に当てられ、該背面にそれぞれ溶接部により固定されていることを特徴とするコンクリート製品の連結金具。
[1] Connection metal fitting Consists of a rectangular joining plate part with a bolt insertion hole and two anchor plate parts that bend from the first opposite side of the joining plate part and extend in the back direction of the joining plate part, a body plate made of a single steel plate;
Including two reinforcing plates in which the strip-shaped steel plate is curved in a W shape for reinforcing the joint plate part,
The two reinforcing plates have a bolt insertion hole formed in the center in the longitudinal direction of the belt and separated portions formed in both ends in the longitudinal direction of the belt by aligning the sides having two W-shaped curved portions. The band width direction is the back direction of the joint plate portion, the band length direction is the direction of the second opposite side of the joint plate portion, and the bolt insertion holes are brought into contact with the rear surface of the joint plate portion so that the bolt insertion holes are aligned. A connecting fitting for a concrete product, characterized in that it is fixed to each by a welded portion.

<作用>
接合板部とアンカー板部が一枚の鋼板製なので、溶接作業が減り、コストが削減される。
接合板部の剛性が、二枚の補強プレートにより補強されて高まり、耐力性能に優れる。特に、二枚の補強プレートはW形の湾曲部が2つある側どうしを合わせた形にするので、接合板部の全域が四隅まで補強される。また、補強プレートの帯幅方向が接合板部の背方向となっているので、コンクリート製品から引き抜かれる力に対して強くなる。
また、補強プレートはW形に湾曲しているので、コンクリートとの付着面積が広がって付着力が大きくなる。特に、二枚の補強プレートはW形の湾曲部が2つある側どうしを合わせた形にするので、帯長方向両端部の離間部にコンクリートが入り込んで付着面積が広がる点が特徴である。
<Action>
Since the joint plate portion and the anchor plate portion are made of one sheet of steel plate, the welding work is reduced and the cost is reduced.
The rigidity of the joint plate portion is enhanced by being reinforced by the two reinforcing plates, resulting in excellent load-bearing performance. In particular, since the two reinforcing plates are formed so that the two sides of the W-shaped curved portions are joined together, the entire joining plate portion is reinforced up to the four corners. Moreover, since the band width direction of the reinforcing plate is the back direction of the joint plate portion, it is strong against the force pulled out from the concrete product.
In addition, since the reinforcing plate is curved in a W shape, the adhesion area to the concrete is widened and the adhesion strength is increased. In particular, since the two reinforcing plates are formed so that the two W-shaped curved portions are joined to each other, concrete enters the spaced portions at both ends in the lengthwise direction of the belt, increasing the adhesion area.

ここで、二枚の補強プレートの帯長方向両端縁と二つのアンカー板部との間に、コンクリート流入用隙間が設けられていることが好ましい。 Here, it is preferable that a gap for concrete inflow is provided between both edges in the belt length direction of the two reinforcing plates and the two anchor plate portions.

溶接部の形状としては、特に限定されず、点状、線状等を例示できるが、二枚の補強プレートの帯長方向両端付近を固定する点状溶接部が好ましい。 The shape of the welded portion is not particularly limited, and may be a dotted shape, a linear shape, or the like, but preferably a dotted welded portion that fixes the vicinity of both ends in the longitudinal direction of the two reinforcing plates.

ボルト差込穴とボルト挿通穴の正面視形状としては、特に限定されず、円形、長円形等を例示できるが、長円形が好ましい。 The shape of the bolt insertion hole and the bolt insertion hole when viewed from the front is not particularly limited, and may be circular, elliptical, or the like, but elliptical is preferable.

二つのアンカー板部の延出中間部に、前記鋼板の一部が曲がってなる中間部リブが設けられていることが好ましい。 It is preferable that an intermediate rib formed by bending a part of the steel plate is provided at an extending intermediate portion of the two anchor plate portions.

二つのアンカー板部の延出端部に、前記鋼板の一部が曲がってなる端部リブが設けられていることが好ましい。 It is preferable that end ribs formed by bending a part of the steel plate are provided at the extending end portions of the two anchor plate portions.

二つのアンカー板部の延出中間部に、貫通穴が設けられていることが好ましい。 It is preferable that a through-hole is provided in the extending intermediate portion of the two anchor plate portions.

[2]コンクリート製品
上記[1]に記載の連結金具が取り付けられたコンクリート製品であって、接合板部の正面がコンクリート製品の接合端面に現れ、二つのアンカー板部がコンクリート製品に埋設され、二枚の補強プレートの離間部にコンクリートが入り込んでいることを特徴とするコンクリート製品。
[2] Concrete product A concrete product to which the connecting fitting according to [1] above is attached, wherein the front surface of the joining plate portion appears at the joining end surface of the concrete product, and the two anchor plate portions are embedded in the concrete product, A concrete product characterized by having concrete in the gap between two reinforcing plates.

ここで、コンクリート製品は縦壁部と底版部とを含む擁壁用ブロックであり、接合端面は縦壁部の側端面であり、アンカー板部の板幅方向が縦壁部の前後方向となるように配置されている態様を例示できる。縦壁部にはその前後方向にせん断力がかかりやすいため、アンカー板部の板幅方向が縦壁部の前後方向であれば、断面係数が大きくなる向きであり、連結金具の剛性が高くなる。 Here, the concrete product is a retaining wall block including a vertical wall portion and a bottom slab portion, the joint end surface is the side end surface of the vertical wall portion, and the plate width direction of the anchor plate portion is the front-rear direction of the vertical wall portion. An embodiment arranged in such a manner can be exemplified. Since shear force is likely to be applied to the vertical wall in the front-rear direction, if the plate width direction of the anchor plate is in the front-rear direction of the vertical wall, the section modulus increases, and the rigidity of the connecting fitting increases. .

本発明によれば、製造時の溶接作業を減らし、コストを削減できるとともに、耐力性能に優れたコンクリート製品の連結金具を得ることができる。 ADVANTAGE OF THE INVENTION According to this invention, the welding work at the time of manufacture can be reduced, the cost can be reduced, and the connecting metal fitting of concrete products with excellent bearing capacity can be obtained.

図1は実施例の連結金具を示し、(a)は正面側から見た斜視図、(b)は背面側から見た斜視図である。FIG. 1 shows a connecting fitting of an embodiment, (a) is a perspective view seen from the front side, and (b) is a perspective view seen from the rear side. 図2は同連結金具を示し、(a)は側面図、(b)は背面図である。FIG. 2 shows the same connecting fitting, (a) is a side view, and (b) is a rear view. 図3は同連結金具が取り付けられた擁壁用ブロックの連結状態を示す斜視図である。FIG. 3 is a perspective view showing a connected state of retaining wall blocks to which the connecting fittings are attached. 図4は同ブロックの部分側面図である。FIG. 4 is a partial side view of the same block. 図5は同ブロックの背面を示し、(a)は連結時の部分背面図、(b)は連結後の部分背面図である。FIG. 5 shows the back of the same block, where (a) is a partial rear view when connected, and (b) is a partial rear view after connection. 図6は図5のVI-VI断面図である。FIG. 6 is a sectional view taken along line VI-VI of FIG.

1.連結金具
矩形状の接合板部には、第1対辺が二つの短辺であり第2対辺が二つの長辺である長方形状の態様と、第1対辺が二つの長辺であり第2対辺が二つの短辺である長方形状の態様と、四辺同一長の正方形状の態様とが含まれる。
アンカー板部には、その鋼板からなる形状部位(中間部リブ、端部リブ等)が形成されていてもよいが、該鋼板以外の鋼材からなる部材は溶接されていないことが好ましい。
1. Connecting fitting The rectangular joining plate portion has a rectangular aspect in which the first opposite side is two short sides and the second opposite side is two long sides, and the first opposite side is two long sides and the second opposite side rectangular shape having two short sides, and square shape having four sides of the same length.
The anchor plate portion may be formed with a shaped portion (intermediate rib, end rib, etc.) made of the steel plate, but it is preferable that members made of steel materials other than the steel plate are not welded.

2.コンクリート製品
コンクリート製品としては、特に限定されないが、擁壁用ブロック、暗渠用ブロック、側溝用ブロック、コンクリートセグメント等を例示できる。
2. Concrete Products Examples of concrete products include, but are not limited to, retaining wall blocks, culvert blocks, gutter blocks, concrete segments, and the like.

本発明の実施例について図面を参照して説明する。なお、実施例の各部の構造、材料、形状及び寸法は例示であり、発明の趣旨から逸脱しない範囲で適宜変更できる。 An embodiment of the present invention will be described with reference to the drawings. The structure, material, shape and dimensions of each part in the embodiment are examples, and can be changed as appropriate without departing from the gist of the invention.

[連結金具]
本実施例の連結金具1は、図1及び図2に示すように、ボルト差込穴4が形成された矩形状の接合板部3と、接合板部3の第1対辺から曲がって接合板部3の背方向へ延出する二つのアンカー板部5,5とからなる、一枚の鋼板よりなる本体プレート2と、接合板部3を補強するための、帯状鋼板がW形に湾曲した二枚の補強プレート6,6とを含む。
[Connecting metal fittings]
As shown in FIGS. 1 and 2, the connecting fitting 1 of this embodiment includes a rectangular joint plate portion 3 having a bolt insertion hole 4 formed therein, and a joint plate portion 3 bent from the first opposite side of the joint plate portion 3 to form a joint plate. A body plate 2 made of a single steel plate, which consists of two anchor plate portions 5, 5 extending in the back direction of the portion 3, and a belt-shaped steel plate curved in a W shape for reinforcing the joint plate portion 3. It includes two reinforcing plates 6,6.

本体プレート2の鋼板は厚さ3~6mmである。接合板部3は、第1対辺が短辺40~60mm、第2対辺が長辺70~90mmの長方形をなしている。各アンカー板部5は、接合板部3に対して直角に曲げられ、第1対辺の長さ以下の幅(例えば30~50mm)で、接合板部3の背方向へ130~180mm延出して、帯状をなしている。 The steel plate of the body plate 2 has a thickness of 3-6 mm. The joint plate portion 3 has a rectangular shape with a short side of 40 to 60 mm on the first opposite side and a long side of 70 to 90 mm on the second opposite side. Each anchor plate portion 5 is bent at right angles to the joint plate portion 3, and extends 130 to 180 mm in the back direction of the joint plate portion 3 with a width (for example, 30 to 50 mm) equal to or less than the length of the first opposite side. , is band-shaped.

各補強プレート6の帯状鋼板は、厚さ3~6mm、帯幅20~50mm(好ましくは30~40mm)で、帯長はW形に湾曲した後のW形の一端から他端までが接合板部3の第2対辺よりもやや短い。 The strip-shaped steel plate of each reinforcing plate 6 has a thickness of 3 to 6 mm, a strip width of 20 to 50 mm (preferably 30 to 40 mm), and a strip length from one end to the other end of the W shape after bending into the W shape. It is slightly shorter than the second opposite side of the portion 3 .

二枚の補強プレート6,6は、W形の湾曲部が2つある側どうしを合わせることにより帯長方向中央部にボルト挿通穴7が形成され且つ帯長方向両端部に離間部8,8が形成された状態で、帯幅方向が接合板部3の背方向となり且つ帯長方向が接合板部3の第2対辺方向となり且つボルト挿通穴7がボルト差込穴4に合致するように接合板部3の背面に当てられ、該背面にそれぞれ溶接部9により固定されている。ボルト差込穴4とボルト挿通穴7は、正面視で長円形である。離間部8,8は、V状に端ほど広がるものである。溶接部9は、二枚の補強プレート6,6の帯長方向両端付近を固定する点状溶接部である。 The two reinforcing plates 6, 6 are formed with a bolt insertion hole 7 in the central portion in the longitudinal direction of the band and separated portions 8, 8 at both ends in the longitudinal direction of the band by joining the sides having two W-shaped curved portions. is formed, the band width direction is the back direction of the joint plate portion 3, the band length direction is the second opposite side direction of the joint plate portion 3, and the bolt insertion hole 7 is aligned with the bolt insertion hole 4 It is applied to the rear surface of the joint plate portion 3 and fixed to the rear surface by the welding portion 9 respectively. The bolt insertion hole 4 and the bolt insertion hole 7 are oval in front view. The spacing portions 8, 8 are V-shaped and widen toward the ends. The welded portion 9 is a spot welded portion that fixes the two reinforcing plates 6, 6 in the vicinity of both ends in the belt length direction.

二枚の補強プレート6,6の帯長方向両端縁と二つのアンカー板部5,5との間に、隙間幅1~5mmのコンクリート流入用隙間10,10が設けられている。二枚の補強プレート6,6の帯長方向両端縁と二つのアンカー板部5,5とは、溶接されていない。 Concrete inflow gaps 10, 10 having a gap width of 1 to 5 mm are provided between both ends of the two reinforcing plates 6, 6 in the longitudinal direction and the two anchor plate portions 5, 5. As shown in FIG. Both ends of the two reinforcing plates 6, 6 in the belt length direction and the two anchor plate portions 5, 5 are not welded.

二つのアンカー板部5,5の延出中間部に、その一側縁から突出した前記鋼板の一部が曲がってなる中間部リブ11,11が設けられている。各中間部リブ11は、各アンカー板部5の外側方へ曲がり、各アンカー板部5の延出方向に延びている。 Intermediate ribs 11, 11 formed by bending a part of the steel plate protruding from one side edge thereof are provided in the extending intermediate portions of the two anchor plate portions 5, 5. As shown in FIG. Each intermediate rib 11 bends outward from each anchor plate portion 5 and extends in the extension direction of each anchor plate portion 5 .

二つのアンカー板部5,5の延出端部に、その端縁から突出した前記鋼板の一部が曲がってなる端部リブ12,12が設けられている。各端部リブ12は、各アンカー板部5の外側方へ曲がり、各アンカー板部5の幅方向に延びている。 End ribs 12, 12 are provided at the extending end portions of the two anchor plate portions 5, 5, and are formed by bending portions of the steel plate protruding from the edge thereof. Each end rib 12 bends outward from each anchor plate portion 5 and extends in the width direction of each anchor plate portion 5 .

二つのアンカー板部5,5の延出中間部に、1つ又は複数の貫通穴13が設けられている。 One or a plurality of through-holes 13 are provided in the extending intermediate portions of the two anchor plate portions 5,5.

[コンクリート製品(擁壁用ブロック)]
図3~図6に示すように、本実施例の連結金具1が取り付けられたコンクリート製品は、接合板部3の正面がコンクリート製品の接合端面に現れ、二つのアンカー板部5,5がコンクリート製品に埋設され、二枚の補強プレート6,6の離間部8,8にコンクリートが入り込んでいることを特徴とする。
[Concrete products (retaining wall blocks)]
As shown in FIGS. 3 to 6, in the concrete product to which the connecting fitting 1 of this embodiment is attached, the front surface of the joint plate portion 3 appears at the joint end face of the concrete product, and the two anchor plate portions 5, 5 are connected to the concrete. It is characterized in that it is embedded in the product and that concrete enters the spaced portions 8, 8 between the two reinforcing plates 6, 6. - 特許庁

ここで、コンクリート製品は、底版部21と縦壁部22とを含むL型の擁壁用ブロック20であり、縦壁部22の背面に膨出して一体形成された取付部23にガードレール30のポスト31が取り付けられるようになっている。隣り合う二つの擁壁用ブロック20は、接合端面24である縦壁部22の側端面を突き合わせて連結されるので、縦壁部22の側縁付近の上部と下部とに連結金具1が取り付けられ、隣り合う連結金具1,1がボルト15とナット16により結合され、隣り合うブロック20が連結される。 Here, the concrete product is an L-shaped retaining wall block 20 including a bottom plate portion 21 and a vertical wall portion 22, and a guardrail 30 is attached to a mounting portion 23 integrally formed on the rear surface of the vertical wall portion 22. A post 31 is adapted to be attached. Since the two adjacent retaining wall blocks 20 are connected by abutting the side end surfaces of the vertical wall portions 22, which are joint end surfaces 24, the connecting fittings 1 are attached to the upper and lower portions near the side edges of the vertical wall portions 22. Adjacent connecting fittings 1, 1 are connected by bolts 15 and nuts 16, and adjacent blocks 20 are connected.

連結金具1は、前述のとおり接合板部3の正面が接合端面24に現れ、二つのアンカー板部5,5が上下に並んで縦壁部22の横方向に延び、従ってアンカー板部5,5の板幅方向が縦壁部22の前後方向となるように配置されて、縦壁部22に埋設されている。中間部リブ11,11と端部リブ12,12もコンクリートに埋設され、貫通穴13にはコンクリートが入り込んでいる。 In the connecting fitting 1, the front surface of the joint plate portion 3 appears at the joint end face 24 as described above, and the two anchor plate portions 5, 5 are vertically aligned and extend in the horizontal direction of the vertical wall portion 22. 5 is arranged so that the plate width direction thereof is the front-rear direction of the vertical wall portion 22 and is embedded in the vertical wall portion 22 . The intermediate ribs 11, 11 and the end ribs 12, 12 are also embedded in concrete, and the through holes 13 are filled with concrete.

また、二枚の補強プレート6,6も縦壁部22に埋設され、離間部8,8にもコンクリートが入り込んでいるが、ボルト挿通穴7にはコンクリートが入り込んでいない。ボルト差込穴4にもコンクリートが入り込んでいない。 Further, the two reinforcing plates 6, 6 are also embedded in the vertical wall portion 22, and the spaced portions 8, 8 are filled with concrete, but the bolt insertion holes 7 are not filled with concrete. Concrete does not enter the bolt insertion hole 4 either.

そして、二つのアンカー板部5,5の対向する両内面に層状に被ったコンクリートと、補強プレート6,6の端面とで囲まれた、ボルト連結用の凹空所25が形成されている。 A recessed space 25 for bolt connection is formed surrounded by a layer of concrete covering the opposite inner surfaces of the two anchor plate portions 5, 5 and the end faces of the reinforcing plates 6, 6. As shown in FIG.

以上のように、擁壁用ブロック20に連結金具1を取り付けるには、コンクリート型枠(図示略)の所定箇所に連結金具1をセットするとともに、凹空所25となるべき箇所にコッター26(箱抜き用治具、図5(a)参照)をセットし、コンクリート型枠にコンクリートを流し込む。離間部8,8には、コッター26側からは該コッター26が蓋になってコンクリートが少しずつしか流入せず充填不足になる可能性があるが、コンクリート流入用隙間10,10からコンクリートが流入して確実に充填される(図6)。コンクリートが硬化した後、コッター26を抜き取ると、凹空所25が現れる。 As described above, in order to attach the connecting metal fitting 1 to the retaining wall block 20, the connecting metal fitting 1 is set at a predetermined position of the concrete formwork (not shown), and the cotter 26 ( A box removal jig (see Fig. 5(a)) is set, and concrete is poured into the concrete mold. From the cotter 26 side, the cotter 26 serves as a lid for the spaced portions 8, 8, and concrete may flow in only little by little, resulting in insufficient filling. to fill reliably (Fig. 6). After the concrete has hardened, the cotter 26 is removed to reveal the recessed cavity 25 .

次に、隣り合う擁壁用ブロック20を連結するには、突き合わせた両連結金具1のボルト差込穴4及びボルト挿通穴7に、一方の凹空所25からボルト15を通し、他方の凹空所25からナット16を螺合して、補強プレート6,6の端面に締め付ける。このとき、ボルト差込穴4及びボルト挿通穴7が長円形なので、突き合わせた連結金具1どうしの位置ずれがあってもそれを吸収し、ボルト15を通すことができる。締め付け後に、凹空所25をモルタル等の充填材27で埋めることが好ましい(図5(b))。 Next, in order to connect the adjacent retaining wall blocks 20, the bolts 15 are passed through the bolt insertion holes 4 and the bolt insertion holes 7 of the connecting fittings 1 that are aligned with each other from the concave spaces 25 on one side, A nut 16 is screwed from the space 25 and tightened to the end faces of the reinforcing plates 6,6. At this time, since the bolt insertion hole 4 and the bolt insertion hole 7 are elliptical, even if there is a positional deviation between the butted connecting fittings 1, it can be absorbed and the bolt 15 can be passed. After tightening, it is preferable to fill the concave space 25 with a filler 27 such as mortar (FIG. 5(b)).

<作用効果>
(ア)接合板部3とアンカー板部5,5が一枚の鋼板製なので、溶接作業が減り、コストが削減される。
(イ)接合板部3の剛性が、二枚の補強プレート6,6により補強されて高まり、耐力性能に優れる。特に、二枚の補強プレート6,6はW形の湾曲部が2つある側どうしを合わせた形にするので、接合板部3の全域が四隅まで補強される。また、補強プレート6の帯幅方向が接合板部3の背方向となっているので、コンクリート製品から引き抜かれる力に対して強くなる(図5(b))。
(ウ)また、補強プレート6,6はW形に湾曲しているので、コンクリートとの付着面積が広がって付着力が大きくなる。特に、二枚の補強プレート6,6はW形の湾曲部が2つある側どうしを合わせた形にするので、帯長方向両端部の離間部8,8にもコンクリートが入り込んで付着面積が広がる点が特徴である(図6)。
<Effect>
(a) Since the joining plate portion 3 and the anchor plate portions 5, 5 are made of one sheet of steel plate, the welding work is reduced and the cost is reduced.
(a) The rigidity of the joining plate portion 3 is increased by being reinforced by the two reinforcing plates 6, 6, and the load-bearing performance is excellent. In particular, since the two reinforcing plates 6, 6 are formed so that the two sides of the W-shaped curved portions are joined together, the entire area of the joining plate portion 3 is reinforced up to the four corners. Moreover, since the band width direction of the reinforcing plate 6 is the back direction of the joint plate portion 3, it is strong against the force pulled out from the concrete product (FIG. 5(b)).
(c) In addition, since the reinforcing plates 6, 6 are curved in a W shape, the adhesion area to the concrete is enlarged, and the adhesion strength is increased. In particular, since the two reinforcing plates 6, 6 are formed so that the two sides of the W-shaped curved portions are joined together, the concrete also enters the spaced portions 8, 8 at both ends in the longitudinal direction of the belt, and the adhesion area is reduced. It is characterized by its widening point (Fig. 6).

(エ)コンクリート流入用隙間から、帯長方向両端部の離間部にコンクリートが入り込みやすく確実に充填される。
(オ)溶接部は、二枚の補強プレートの帯長方向両端付近を固定する点状溶接部であるから、溶接作業が減り、コストが削減される。
(カ)ボルト差込穴とボルト挿通穴が長円形であることから、ボルトに対してルーズホールであり、前記のとおり連結金具どうしの位置ずれを吸収できる。
(d) From the concrete inflow gap, the spaced portions at both ends in the longitudinal direction of the strip are easily filled with concrete, and are reliably filled.
(e) The welded portion is a spot welded portion that fixes the vicinity of both ends of the two reinforcing plates in the belt length direction, so that the welding work is reduced and the cost is reduced.
(f) Since the bolt insertion holes and the bolt insertion holes are elliptical, they are loose holes for the bolts, and as described above, misalignment between the connecting fittings can be absorbed.

(キ)中間部リブ11,11により、ガードレール30に衝突荷重がかかったとき等に縦壁部22に前後方向に生じるせん断力に対して、連結金具1が強くなる(図4)。
(ク)端部リブ12,12により、連結金具1がコンクリート製品(縦壁部22)から引き抜かれる力に対して強くなる(図5(b))。
(ケ)貫通穴13,13にコンクリートが入ることにより、コンクリートの付着力が大きくなる。
(g) Due to the intermediate ribs 11, 11, the connecting fitting 1 is strengthened against the shear force generated in the longitudinal direction on the vertical wall portion 22 when a collision load is applied to the guardrail 30 (Fig. 4).
(h) Due to the end ribs 12, 12, the connecting fitting 1 is strong against the force of being pulled out from the concrete product (vertical wall portion 22) (Fig. 5(b)).
(i) As concrete enters the through holes 13, 13, the adhesion of the concrete increases.

なお、本発明は前記実施例に限定されるものではなく、発明の趣旨から逸脱しない範囲で適宜変更して具体化することができる。 It should be noted that the present invention is not limited to the above-described embodiments, and can be embodied with appropriate modifications without departing from the gist of the invention.

1 連結金具
2 本体プレート
3 接合板部
4 ボルト差込穴
5 アンカー板部
6 補強プレート
7 ボルト挿通穴
8 離間部
9 溶接部
10 コンクリート流入用隙間
11 中間部リブ
12 端部リブ
13 貫通穴
15 ボルト
16 ナット
20 擁壁用ブロック
21 底版部
22 縦壁部
23 取付部
24 接合端面
25 凹空所
26 コッター
27 充填材
30 ガードレール
31 ポスト
REFERENCE SIGNS LIST 1 connecting metal fitting 2 main body plate 3 joining plate portion 4 bolt insertion hole 5 anchor plate portion 6 reinforcing plate 7 bolt insertion hole 8 separation portion 9 welding portion 10 gap for concrete inflow 11 middle portion rib 12 end portion rib 13 through hole 15 bolt 16 Nut 20 Retaining Wall Block 21 Bottom Plate Part 22 Vertical Wall Part 23 Mounting Part 24 Joint End Face 25 Concave Space 26 Cotter 27 Filler 30 Guard Rail 31 Post

Claims (9)

ボルト差込穴(4)が形成された矩形状の接合板部(3)と、接合板部(3)の第1対辺から曲がって接合板部(3)の背方向へ延出する二つのアンカー板部(5,5)とからなる、一枚の鋼板よりなる本体プレート(2)と、
接合板部(3)を補強するための、帯状鋼板がW形に湾曲した二枚の補強プレート(6,6)とを含み、
二枚の補強プレート(6,6)は、W形の湾曲部が2つある側どうしを合わせることにより帯長方向中央部にボルト挿通穴(7)が形成され且つ帯長方向両端部に離間部(8,8)が形成された状態で、帯幅方向が接合板部(3)の背方向となり且つ帯長方向が接合板部(3)の第2対辺方向となり且つボルト挿通穴(7)がボルト差込穴(4)に合致するように接合板部(3)の背面に当てられ、該背面にそれぞれ溶接部(9)により固定されていることを特徴とするコンクリート製品の連結金具。
A rectangular joining plate portion (3) formed with a bolt insertion hole (4), and two joint plate portions (3) bent from the first opposite side of the joining plate portion (3) and extending in the back direction of the joining plate portion (3). a main body plate (2) made of a single steel plate and including anchor plate portions (5, 5);
and two reinforcing plates (6, 6) in which the strip-shaped steel plate is curved in a W shape for reinforcing the joint plate portion (3),
The two reinforcing plates (6, 6) are formed with a bolt insertion hole (7) in the central part in the longitudinal direction of the belt by joining the sides having two W-shaped curved parts, and are spaced apart at both ends in the longitudinal direction of the belt. With the portions (8, 8) formed, the band width direction is the back direction of the joint plate portion (3), the band length direction is the second opposite side direction of the joint plate portion (3), and the bolt insertion hole (7) ) is applied to the back of the joint plate (3) so as to match the bolt insertion hole (4), and is fixed to the back by the weld (9) respectively. .
二枚の補強プレート(6,6)の帯長方向両端縁と二つのアンカー板部(5,5)との間に、コンクリート流入用隙間(10,10)が設けられている請求項1記載のコンクリート製品の連結金具。 Claim 1, wherein gaps (10, 10) for concrete inflow are provided between both edges of the two reinforcing plates (6, 6) in the longitudinal direction and the two anchor plate portions (5, 5). metal fittings for concrete products. 溶接部(9)は、二枚の補強プレート(6,6)の帯長方向両端付近を固定する点状溶接部である請求項1又は2記載のコンクリート製品の連結金具。 3. A connecting fitting for concrete products according to claim 1 or 2, wherein the welding part (9) is a point-like welding part for fixing the two reinforcing plates (6, 6) in the vicinity of both ends in the belt length direction. ボルト差込穴(4)とボルト挿通穴(7)は、正面視で長円形である請求項1、2又は3記載のコンクリート製品の連結金具。 4. The connecting fitting for concrete products according to claim 1, 2 or 3, wherein the bolt insertion hole (4) and the bolt insertion hole (7) are oval in front view. 二つのアンカー板部(5,5)の延出中間部に、前記鋼板の一部が曲がってなる中間部リブ(11)が設けられている請求項1~4のいずれか一項に記載のコンクリート製品の連結金具。 5. The anchor plate part according to any one of claims 1 to 4, wherein an intermediate rib (11) formed by bending a part of said steel plate is provided at an extending intermediate part of the two anchor plate parts (5, 5). Connecting fittings for concrete products. 二つのアンカー板部(5,5)の延出端部に、前記鋼板の一部が曲がってなる端部リブ(12)が設けられている請求項1~5のいずれか一項に記載のコンクリート製品の連結金具。 6. The method according to any one of claims 1 to 5, wherein the extending ends of the two anchor plate portions (5, 5) are provided with end ribs (12) formed by bending a part of the steel plate. Connecting fittings for concrete products. 二つのアンカー板部(5,5)に、貫通穴(13)が設けられている請求項1~6のいずれか一項に記載のコンクリート製品の連結金具。 The connecting fitting for concrete products according to any one of claims 1 to 6, wherein the two anchor plate portions (5, 5) are provided with through holes (13). 請求項1~7のいずれか一項に記載の連結金具が取り付けられたコンクリート製品であって、接合板部(3)の正面がコンクリート製品(20)の接合端面(24)に現れ、二つのアンカー板部(5,5)がコンクリート製品(20)に埋設され、二枚の補強プレート(6,6)の離間部(8,8)にコンクリートが入り込んでいることを特徴とするコンクリート製品。 A concrete product to which the connecting fitting according to any one of claims 1 to 7 is attached, wherein the front surface of the joint plate portion (3) appears on the joint end surface (24) of the concrete product (20), and two A concrete product characterized in that anchor plate portions (5, 5) are embedded in the concrete product (20), and concrete is embedded in spaced portions (8, 8) between two reinforcing plates (6, 6). コンクリート製品(20)は縦壁部(22)と底版部(21)とを含む擁壁用ブロックであり、接合端面(24)は縦壁部(22)の側端面であり、アンカー板部(5,5)の板幅方向が縦壁部(22)の前後方向となるように配置されている請求項8記載のコンクリート製品。 The concrete product (20) is a retaining wall block including a vertical wall portion (22) and a bottom plate portion (21). 9. The concrete product according to claim 8, wherein the plate width direction of 5, 5) is arranged in the longitudinal direction of the vertical wall portion (22).
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