JP4303083B2

JP4303083B2 - Reinforced concrete construction spacer

Info

Publication number: JP4303083B2
Application number: JP2003360193A
Authority: JP
Inventors: 能行小谷
Original assignee: アートスペース株式会社
Priority date: 2002-11-19
Filing date: 2003-10-21
Publication date: 2009-07-29
Anticipated expiration: 2023-10-21
Also published as: JP2004183470A

Description

本発明は、鉄筋コンクリートによる構造物を施工時に、鉄筋籠の鉄筋と型枠板との間隔を一定に保持するために、鉄筋に挟持・掛止して使用されるスペーサーに関するものである。 The present invention relates to a spacer that is used by being sandwiched and hooked to a reinforcing bar in order to maintain a constant interval between the reinforcing bar and the formwork plate during construction of a reinforced concrete structure.

コンクリートにより高速道路の橋桁、側壁、建物のスラブ等を施工する場合に、コンクリートが施工用型枠内へ流し込まれた際、その重量・圧力でその補強用の鉄筋が曲がったり移動したりすると、構造物は充分な強度を有さなくなると共に、鉄筋が構造物から露出することになる。 When constructing highway bridge girders, side walls, building slabs, etc. with concrete, when the concrete is poured into the formwork for construction, if the reinforcing bars bend or move with its weight and pressure, The structure will not have sufficient strength and the reinforcing bars will be exposed from the structure.

そのため、コンクリートが施工用型枠内へ流し込まれた際にも、その重量・圧力でその補強用鉄筋が曲がったり移動したりしないように鉄筋を支持し、型枠板との間を一定に保持する必要がある。そこで、鉄筋を支持するために介装させる鉄筋コンクリート施工用スペーサーが用いられている。この鉄筋コンクリート施工用スペーサーとしては、従来より各種のものが提案されているが、例えば次のようなものがある。 Therefore, even when concrete is poured into the construction formwork, the reinforcing bars are supported by the weight and pressure so that they do not bend or move, and the space between them is kept constant. There is a need to. Therefore, a reinforced concrete construction spacer is used to support the reinforcing bars. Various types of spacers for constructing reinforced concrete have been proposed in the past. For example, there are the following.

特開平６−１４６７９号公報これは、コンクリートまたはモルタル製で、側方から見て台形状即ち上部が裁断された四角錐形のスペーサーの上面部に、鉄筋載置用の凹溝を形成したものである。JP, 6-14679, A This is made of concrete or mortar and has a trapezoidal shape when viewed from the side, that is, a concave portion for placing a reinforcing bar on the upper surface of a quadrangular pyramid shaped spacer. It is.

特開平６−１６５５６号公報これは、コンクリートまたはモルタル製のスペーサー本体部と、弾性を有する金属板製で中央部に断面がほぼ倒立Ω状部をもつ鉄筋支持プレート部とからなり、該プレート部を上記スペーサー本体部に中央部でわずかな間隔が空くように、両肩部で嵌合させたものである。JP, 6-16556, A This consists of a spacer body part made of concrete or mortar, and a reinforcing bar support plate part made of an elastic metal plate and having a substantially inverted Ω-shaped section at the center. Is fitted to both the shoulders so that a slight gap is left at the center of the spacer body.

特開２０００−１４５０２１号公報これは、コンクリートまたはモルタル製のスペーサー本体部と、弾性を有する金属線製の鉄筋支持アームとからなり、該鉄筋支持アームの中央部をスペーサー本体部上面に埋め込み固定し、その両側部が鉄筋の長手方向と非直交状に互いに逆方向へ延長させるとともに、さらにその両側部を鉄筋の長手方向と直交状で、かつ鉄筋の外周面を相対方向から挟み付けるようにフック状に折り曲げたものである。JP, 2000-145021, A This consists of a spacer body made of concrete or mortar and a reinforcing bar support arm made of metal wire having elasticity, and the central part of the reinforcing bar support arm is embedded and fixed on the upper surface of the spacer body. Hook so that both sides extend in the opposite direction non-orthogonally with the longitudinal direction of the reinforcing bar, and both sides are perpendicular to the longitudinal direction of the reinforcing bar, and the outer peripheral surface of the reinforcing bar is sandwiched from the relative direction It is bent into a shape.

ところが、上記従来の鉄筋コンクリート施工用スペーサーには、次のような問題点があった。
まず上記特許文献１のものは、スペーサーの上面部に鉄筋載置用の凹溝を形成しただけであるから、該スペーサーを型枠板の水平面に載置して使用する場合は、凹溝内に係合させた横鉄筋との間で位置ズレは比較的少ない。しかしこのスペーサーは、鉄筋を単に凹溝内に係合させているだけであるから、垂直面や傾斜面をもつ型枠板における鉄筋との間では、該スペーサーは簡単に位置ズレしたり外れてしまって使えない。別種のスペーサーを用意する必要があり、あるいは縦鉄筋を横鉄筋に針金で強く巻いて掛止する手間を要することになる。 However, the conventional spacer for reinforced concrete construction has the following problems.
First, since the above-mentioned Patent Document 1 only has a groove for placing a reinforcing bar on the upper surface of the spacer, when the spacer is placed on the horizontal surface of the mold plate, There is relatively little misalignment between the horizontal reinforcing bars engaged with the. However, since this spacer merely engages the reinforcing bar in the concave groove, the spacer can be easily displaced or disengaged with the reinforcing bar in the form plate having the vertical surface or the inclined surface. I cannot use it. It is necessary to prepare a different type of spacer, or it takes time and effort to wind the vertical reinforcing bar around the horizontal reinforcing bar with a wire.

上記特許文献２のものは、鉄筋支持プレート部が弾性を有する金属板製で断面がほぼ倒立Ω状部をもつため、取付け作業時に鉄筋をその倒立Ω状部内へ開口部から嵌め入れればよく、作業は簡単である。また該スペーサーを型枠板の水平面に載置して使用するだけであるなら、倒立Ω状部内へ嵌め入れた横鉄筋との間で移動や位置ズレは比較的少ない。 In the above-mentioned Patent Document 2, since the reinforcing bar support plate is made of a metal plate having elasticity and the cross section has an approximately inverted Ω-shaped part, the reinforcing bar may be inserted into the inverted Ω-shaped part from the opening during the mounting operation. The work is simple. Further, if the spacer is only used by being placed on the horizontal surface of the mold plate, there is relatively little movement and displacement between the horizontal reinforcing bars fitted into the inverted Ω-shaped portion.

しかしそのほぼ倒立Ω状部は、狭い開口部により嵌め入れた鉄筋が抜け出すことは防止できるが、内部の鉄筋を単に両側板部間で両側方からのバネ力で挟んでいるだけであるからその挟持力は弱く、コンクリートの流し込み等の外力が加わると、このスぺーサーは簡単に外周方向に回って横を向いたり、鉄筋の長手方向に沿って滑って位置ズレしてしまった。特に縦鉄筋や傾斜鉄筋に対しては下方へ降下し易く、コンクリートの流し込み等の外力が加わると、必ずと言ってよい程に回って横を向いたり、鉄筋の長手方向へ滑って位置ズレしてしまったりする。 However, the almost inverted Ω-shaped part can prevent the rebar inserted by the narrow opening from coming out, but the internal rebar is simply sandwiched between both side plate parts by the spring force from both sides. The clamping force was weak, and when an external force such as concrete pouring was applied, this spacer easily turned to the outer periphery and turned sideways, or slid along the longitudinal direction of the reinforcing bar. Especially for vertical and inclined rebars, it is easy to descend downwards, and when an external force such as concrete pouring is applied, it will turn to the extent that it can be said, or it will slip in the longitudinal direction of the rebar. I will.

さらに上記特許文献３のものは、弾性を有する金属線製の鉄筋支持アームが、その両側部を鉄筋の長手方向と非直交状に互いに逆方向へ延長し、更にその両側部を鉄筋の長手方向と直交状で、かつ鉄筋の外周面を相対方向から挟み付けるようにフック状に折り曲げてある。そのため、この鉄筋支持アームに鉄筋に嵌め込まれると、各フック状部が弾圧的に鉄筋の外周面に食い込むようになり、横鉄筋でも縦鉄筋でも長手方向へ滑って位置ズレしたり、空周りしたりすることはない。 Further, in the above-mentioned Patent Document 3, the reinforcing bar support arm made of metal wire having elasticity extends in the opposite direction to the longitudinal direction of the reinforcing bar in the opposite direction to the longitudinal direction of the reinforcing bar, and further in the longitudinal direction of the reinforcing bar. The outer peripheral surface of the reinforcing bar is bent in a hook shape so as to be sandwiched from the relative direction. For this reason, when the reinforcing bar is fitted into the reinforcing bar support arm, each hook-shaped part elastically bites into the outer peripheral surface of the reinforcing bar, and either the horizontal reinforcing bar or the vertical reinforcing bar slides in the longitudinal direction and is displaced or idle. There is nothing to do.

しかし、該支持アームを鉄筋に嵌め込む際には、係止用の両フック状部の先端を鉄筋の長手方向に対して斜め状に鉄筋の外周面に当てがい、その状態でスペーサー本体部を捩じる（回す）ことにより、両フック状部を鉄筋の外周面に差し込み係止させるという操作が必要になる。またその際には両フック状部を、残る片手の指先により背中方向から順次に押し込んで、上記の捩じり回転操作を助勢する手間も要する。 However, when the support arm is fitted into the reinforcing bar, the tips of both hook-shaped portions for locking are applied to the outer peripheral surface of the reinforcing bar obliquely with respect to the longitudinal direction of the reinforcing bar, and in this state, the spacer main body is attached to the reinforcing bar. By twisting (turning), an operation of inserting and locking both hook-shaped portions into the outer peripheral surface of the reinforcing bar becomes necessary. Further, at that time, both the hook-shaped portions are sequentially pushed in from the back direction with the fingertips of the other hand, and it takes time and effort to assist the torsional rotation operation.

しかも、この支持アーム付きスペンサー本体部を、鉄筋と型枠の板との間に差し入れた状態で捩じるという作業は、鉄筋と型枠板との間隔が狭い場合には容易でなく、作業性がきわめて悪く、多数個のスペーサーを取り付けるにはかなりの時間がかかってしまう。 Moreover, the work of twisting the spencer main body with the support arm in a state of being inserted between the reinforcing bar and the formwork plate is not easy when the distance between the reinforcing bar and the formwork plate is narrow. It is very poor and it takes a lot of time to install a large number of spacers.

本発明は、上記従来の鉄筋コンクリート施工用スペーサーがもつ問題点の解消を課題としたものである。即ち、本発明の目的は、製造が容易で製造コストが高くならぬことは勿論のこと、鉄筋と型枠板との間が狭くとも鉄筋への嵌め込み作業が容易・迅速に行えて作業性が良いと共に、横鉄筋でも縦鉄筋でも一旦鉄筋に取り付けた後は、長手方向へ滑ることが無くて位置ズレを生じず、かつ鉄筋の外周方向へ回ることも無くてスペーサーが横を向くことも防止した、鉄筋コンクリート施工用スペーサーを提供することにある。 An object of the present invention is to solve the problems of the conventional spacer for reinforced concrete construction. In other words, the object of the present invention is that the manufacturing is easy and the manufacturing cost does not increase, and even if the space between the reinforcing bar and the formwork plate is narrow, the fitting work to the reinforcing bar can be performed easily and quickly and the workability is improved. In addition to being good, both horizontal bars and vertical bars, once attached to the bar, will not slip in the longitudinal direction and will not be displaced, and will not rotate in the outer circumferential direction of the bar, preventing the spacer from turning sideways. An object of the present invention is to provide a reinforced concrete construction spacer.

請求項１及び請求項２に記載の各発明は、
コンクリートまたはモルタル製のスペーサー本体部１に、バネ性をもつ金属板製の鉄筋挟持用部２を、中央基部３近傍の足片部４を埋め込んで一体化したものであり、
スペーサー本体部１から突出した鉄筋挟持用部２の両側板部５を、ここで挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状に形成し、
開口部７寄りの両側板部５から少なくとも各１本の爪片８を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設すると共に、中央基部３寄りからも少なくとも各１本の爪片９を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設し、
鉄筋１０の長手方向から見て先端部が対向状の両爪片８，９間の間隔Ｓを、ここで挟持する鉄筋１０の外径Ｄより少し小さめに形成した鉄筋コンクリート施工用スペーサーＡである。
さらに、請求項１に係る発明は、鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部を切り起こして形成したものである。
また、請求項２に係る発明は、鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部に予め側方へ突出形成した爪片用の小三角片１９を折り曲げて形成したものである。 Each invention of claim 1 and claim 2,
The spacer main body 1 made of concrete or mortar is integrated with a reinforcing plate holding part 2 made of a metal plate having spring properties by embedding a foot piece part 4 in the vicinity of the central base part 3,
The both side plate portions 5 of the reinforcing bar clamping portion 2 protruding from the spacer body 1 are formed in an inverted Ω shape when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched here,
At least one claw piece 8 protrudes from the side plate portions 5 near the opening 7 toward the substantially center of the inverted Ω-shaped portion 6 and at least one claw piece also from the center base 3 side. 9 is projected toward almost the center of the inverted Ω-shaped portion 6 ,
This is a reinforced concrete construction spacer A in which the distance S between the claws 8 and 9 whose tip portions are opposed to each other when viewed from the longitudinal direction of the reinforcing bar 10 is formed slightly smaller than the outer diameter D of the reinforcing bar 10 sandwiched here .
Further, according to the first aspect of the present invention, each of the two claw pieces 9 formed near the central base 3 of the side plate portions 5 of the reinforcing bar clamping portion 2 is formed by cutting and raising both side edges.
Further, the invention according to claim 2 is a claw piece in which each of the two claw pieces 9 formed near the central base 3 of the both side plate parts 5 of the reinforcing bar clamping part 2 is formed to protrude laterally in advance on both side edges. The small triangular piece 19 for use is bent and formed.

請求項３に記載の発明は、The invention according to claim 3
コンクリートまたはモルタル製のスペーサー本体部１に、バネ性をもつ金属板製の鉄筋挟持用部２を、中央基部３近傍の足片部４を埋め込んで一体化したものであり、  The spacer main body 1 made of concrete or mortar is integrated with a reinforcing plate holding part 2 made of a metal plate having spring properties by embedding a foot piece part 4 in the vicinity of the central base part 3,
スペーサー本体部１から突出した鉄筋挟持用部２の両側板部５を、ここで挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状で、かつその開口部７寄りのほぼ半分を斜め直線状部分１７に形成し、  The both side plates 5 of the reinforcing bar holding portion 2 protruding from the spacer main body 1 are in an inverted Ω shape when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched here, and almost half of the side near the opening 7 is an oblique straight line. Formed in part 17,
開口部７寄りの両側板部５から少なくとも各１本の爪片８を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設すると共に、中央基部３寄りからも少なくとも各１本の爪片９を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設し、  At least one claw piece 8 protrudes from the side plate portions 5 near the opening 7 toward the substantially center of the inverted Ω-shaped portion 6 and at least one claw piece also from the center base 3 side. 9 is projected toward almost the center of the inverted Ω-shaped portion 6,
かつ、鉄筋１０の長手方向から見て先端部が対向状の両爪片８，９間の間隔Ｓを、ここで挟持する鉄筋１０の外径Ｄより少し小さめに形成した鉄筋コンクリート施工用スペーサーＡである。  In addition, a reinforced concrete construction spacer A is formed in which the distance S between the claw pieces 8 and 9 whose tip portions are opposed to each other when viewed from the longitudinal direction of the reinforcing bar 10 is slightly smaller than the outer diameter D of the reinforcing bar 10 sandwiched here. is there.

上述した各発明において、上記スペーサー本体部１から突出した鉄筋挟持用部２は、両側板部５に各窓孔１２を形状すると共に、各窓孔１２でその両内側縁を繋ぐように横板部１８を形成しておくことが望ましい。また、請求項３に係る発明において、鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部を切り起こして形成することは望ましい。また、請求項３に係る発明において、鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部に予め側方へ形成した爪片用の小三角片１９を折り曲げて形成することは望ましい。In each of the above-described inventions, the reinforcing bar holding portion 2 protruding from the spacer main body 1 forms the window holes 12 in the side plate portions 5 and the horizontal plates so as to connect the inner edges of the window holes 12. It is desirable to form the portion 18 in advance. Moreover, in the invention which concerns on Claim 3, it is desirable to form each two nail | claw piece 9 formed near the center base 3 of the both-sides board part 5 of the reinforcing bar clamping part 2 by raising both side edges. Moreover, in the invention which concerns on Claim 3, the two nail | claw piece 9 formed from the center base part 3 vicinity of the both-sides board part 5 of the reinforcing-bar clamping part 2 was used for the nail | claw piece previously formed in the side on both sides. It is desirable that the small triangular piece 19 is bent.

上記構成の本発明に係る鉄筋コンクリート施工用スペーサーＡによれば、製造が容易で製造コストが高くならず、鉄筋と型枠板との間が狭くても鉄筋への嵌め込み作業を容易・迅速に行えると共に、横鉄筋でも縦鉄筋でも一旦鉄筋に取り付けた後は強固に掛止・挟持できて、長手方向や外周方向へ滑って位置ズレや横向きになったりすることを無くせる。 According to the reinforced concrete construction spacer A according to the present invention having the above-described configuration, the manufacturing is easy and the manufacturing cost is not high, and even if the space between the reinforcing bar and the formwork plate is narrow, the fitting operation to the reinforcing bar can be performed easily and quickly. At the same time, both horizontal and vertical reinforcing bars can be firmly hooked and clamped once attached to the reinforcing bars, and can be prevented from slipping in the longitudinal direction or the outer peripheral direction and being displaced or turned sideways.

即ち、従来のこの種のスペーサーでは、鉄筋への取付け作業に手間がかかったり、コンクリートを流し込んだ際に、縦鉄筋に取り付けた場合は勿論のこと、横鉄筋の場合でも圧力や振動で鉄筋から簡単に外れ、スペーサーの役割を果たさなくなったりした。また取付け作業は簡単であるが、コンクリートを流し込んだ際に、横鉄筋に取付けた場合は鉄筋の周方向へ回動して横を向いたり、縦鉄筋へ取付けた場合は鉄筋の長手方向へ簡単に滑ったりした。さらに一旦鉄筋に取付けた後は容易に動かないが、取付け時の作業性がきわめて悪かったりした。 In other words, with this type of conventional spacer, it takes time to install the rebar, or when the concrete is poured into the vertical rebar, not to mention the case where it is attached to the vertical rebar. It came off easily and could no longer function as a spacer. Also, the installation work is easy, but when concrete is poured, if it is attached to a horizontal rebar, it rotates in the circumferential direction of the rebar and turns sideways, or if it is attached to a vertical rebar, it is easy to move in the longitudinal direction of the rebar. I slipped. Furthermore, once attached to the reinforcing bar, it did not move easily, but the workability during installation was extremely poor.

これに対して、本発明に係るスペーサーＡでは、上記のような構成としたことにより、次の効果が生じる。
イ）本発明のスペーサーＡの製造には、バネ性を有する鋼板をプレス加工して予め湾曲した鉄筋挟持用部２を形成しておき、その足片部４をスペーサー本体成形用型枠内へ入れてモルタルまたはコンクリートを流し込むことで、両者が一体化したものが出来上がる。そのため、製造が容易であると共に、製造コストも従来のものと同様に安価である。 On the other hand, in the spacer A according to the present invention, the following effects are produced by the above configuration.
B) In manufacturing the spacer A of the present invention, a spring-clamped steel plate is pressed to form a curved reinforcing bar clamping portion 2 in advance, and the foot piece 4 is put into a spacer body forming mold. By putting mortar or concrete into it, you can create an integrated product. Therefore, it is easy to manufacture and the manufacturing cost is low as in the conventional case.

ロ）本発明のスペーサーＡの取付け作業時には、横鉄筋へ取付ける場合には、該横鉄筋を持ち上げて底部の型枠板上に本発明のスペーサーＡを載置し、上方へ開いた開口部７に鉄筋を乗せて、該鉄筋を手で押し下げまたは足で踏み込むだけでよい。これで該鉄筋はバネ力に抗して開口部７から、鉄筋の長手方向から見てほぼ倒立Ω状部６内の各爪片８，９の先端部間へ係合され、バネ力で挟持・掛止されることになるから、取付け作業を容易・迅速に行なうことができる。 B) When attaching the spacer A of the present invention to the horizontal reinforcing bar, the horizontal reinforcing bar is lifted, the spacer A of the present invention is placed on the bottom formwork plate, and the opening 7 is opened upward. It is only necessary to put a reinforcing bar on the foot and push it down by hand or step on it with your foot. The reinforcing bars are thus engaged from the opening 7 against the spring force between the tips of the claw pieces 8 and 9 in the inverted Ω-shaped part 6 when viewed from the longitudinal direction of the reinforcing bar, and are sandwiched by the spring force.・ Because it will be hooked, installation work can be done easily and quickly.

また縦鉄筋へ取付ける場合は、縦鉄筋の側方から本発明のスペーサーＡの鉄筋挟持用部２の開口部７を当てがい、スペーサー本体部１を縦鉄筋側へ押圧すればよい。これで該鉄筋挟持用部２は、上記と同様にバネ力に抗して開いて開口部７から縦鉄筋に套合し、ほぼ倒立Ω状部６内で各爪片８，９の先端部がバネ力で該縦鉄筋の外周面を挟持・掛止することになるから、やはり取付け作業を容易・迅速に行うことができる。 Moreover, when attaching to a vertical reinforcing bar, the opening part 7 of the reinforcing bar clamping part 2 of the spacer A of the present invention may be applied from the side of the vertical reinforcing bar to press the spacer main body 1 to the vertical reinforcing bar side. As described above, the reinforcing bar clamping portion 2 opens against the spring force and engages with the vertical reinforcing bar from the opening 7, so that the tip end portions of the claw pieces 8 and 9 are almost in the inverted Ω-shaped portion 6. Since the outer peripheral surface of the vertical reinforcing bar is clamped and latched by the spring force, the mounting operation can be easily and quickly performed.

ハ）本発明のスペーサーＡを鉄筋へ一旦取付けた後の取付け後は、上記のようにバネ力をもつ鉄筋挟持用部２が、ほぼ倒立Ω状部６内で開口部７寄りからの爪片８と、中央基部３寄りからの爪片９との各先端部で、鉄筋の外周面を強固に掛止し挟持している。 C) After the spacer A of the present invention is once attached to the reinforcing bar, the reinforcing bar holding portion 2 having the spring force as described above is a claw piece from the vicinity of the opening 7 in the inverted Ω-shaped portion 6. The outer peripheral surface of the reinforcing bar is firmly hooked and pinched at the respective tip portions of 8 and the claw piece 9 from the center base 3 side.

そのため、コンクリート流し込み時の圧力等により、本発明の鉄筋挟持用部２の開口部７から鉄筋が抜け出す方向への力が作用しても、該鉄筋は開口部７寄りからほぼ中央寄りへ向いた爪片８によって掛止されているから、鉄筋が鉄筋挟持用部２から抜け出すこと、換言すれば本発明のスペーサーＡが鉄筋から外れることは阻止されている。 Therefore, even if a force in the direction in which the reinforcing bar is pulled out from the opening 7 of the reinforcing bar clamping part 2 of the present invention is applied due to the pressure at the time of pouring the concrete, the reinforcing bar is directed toward the center from the opening 7 side. Since the hook is hooked by the claw piece 8, it is prevented that the reinforcing bar comes out of the reinforcing bar clamping portion 2, in other words, the spacer A of the present invention is not released from the reinforcing bar.

ニ）また本発明のスペーサーＡは、鉄筋挟持用部２の開口部７寄りからの爪片８と、中央基部３寄りからの爪片９との各先端部間で、四方から鉄筋の外周面を掛止・挟持した状態にあるので、コンクリート流し込み時にもこれら爪片８，９の先端部が鉄筋外周面の環状凸条部で掛止され、本発明のスペーサーＡが鉄筋の長手方向へ滑って位置ズレすることも防止されている。 D) Further, the spacer A of the present invention is an outer peripheral surface of the reinforcing bar from the four sides between the tips of the claw piece 8 near the opening 7 and the claw piece 9 near the central base 3. Since the claw pieces 8 and 9 are hooked by the annular ridges on the outer peripheral surface of the reinforcing bar, the spacer A of the present invention slides in the longitudinal direction of the reinforcing bar. It is also possible to prevent misalignment.

ホ）さらに、コンクリート流し込み時に本発明のスペーサーＡを鉄筋の外周方向へ回動させるような力が作用しても、同様に鉄筋挟持用部２の開口部７寄りからの爪片８と、中央基部９寄りからの爪片９の先端部間で四方から鉄筋の外周面を掛止・挟持されていることにより、本発明のスペーサーＡは外周方向へ回動して横を向いてしまうことがなく、型枠板と鉄筋とは一定間隔が維持され常に所定のかぶり寸法を保持できる。 E) Further, even when a force that rotates the spacer A of the present invention toward the outer periphery of the reinforcing bar acts when pouring the concrete, the nail piece 8 from the vicinity of the opening 7 of the reinforcing bar holding portion 2 and the center Since the outer peripheral surface of the reinforcing bar is hooked and clamped from the four sides between the tips of the claw pieces 9 from the base 9 side, the spacer A of the present invention may turn in the outer peripheral direction and turn sideways. In other words, the mold plate and the reinforcing bar are kept at a constant distance and can always maintain a predetermined cover size.

ヘ）また鉄筋挟持用部２の両側板部５は、ほぼ倒立Ω状でかつその開口部７寄りほぼ半分を斜め直線状部分１７に形成してあるものでは、ほぼ倒立Ω状部分の両側からのバネ力の挟持・掛止に加えて、その開口部７寄りほぼ半分の両側斜め直線状部分１７が、中央基部３寄りのほぼ半円形状部分との境界である屈曲状部１６を支点として斜め内側方向へのバネ力を作用させる。そのため、挟持される鉄筋を、中心基部３寄りの両爪片９側へ一層強く押し付けることになり、スペーサーＡと鉄筋との間の挟持・掛止をより強固なものにできる。 F) In the case where the both side plates 5 of the reinforcing bar holding portion 2 are substantially inverted Ω-shaped and have almost half of the opening 7 near the opening 7 formed in the diagonally linear portion 17, from both sides of the inverted Ω-shaped portion. In addition to the clamping / holding of the spring force, the slanted linear part 17 on both sides near the opening 7 has a bent part 16 as a fulcrum that is a boundary with a substantially semicircular part near the central base 3. A spring force is applied in an obliquely inward direction. For this reason, the sandwiched reinforcing bars are pressed more strongly against both the claw pieces 9 near the center base 3, and the clamping / holding between the spacer A and the reinforcing bars can be made stronger.

ト）加えて、鉄筋挟持用部２の両側板部５に各窓孔１２を形状すると共に、各窓孔１２でその両内側縁を繋ぐように横板部１８を形成したものでは、コンクリートを流し込んだ際に窓孔１２からも通過するのでコンクリートの影が生じないし、またその窓孔１２の両内側を繋ぐように横板部１８を形成したものでは、窓孔１２を形成したことによるバネ性や強度の問題を解消できる。 In addition, in the case where each window hole 12 is formed in the both side plate parts 5 of the reinforcing bar clamping part 2 and the horizontal plate part 18 is formed so as to connect both inner edges of each window hole 12, concrete is used. Since it also passes through the window hole 12 when poured, the shadow of the concrete does not occur, and in the case where the horizontal plate portion 18 is formed so as to connect both the insides of the window hole 12, the spring due to the formation of the window hole 12 Can solve the problem of property and strength.

リ）しかも、筋挟持用部２の両側板部５の中央基部３寄りから形成した各１本の爪片９を、両側縁部に側方へ向けて予め形成した爪片用の小三角片１９を折り曲げて形成したものでは、両側板部５の側縁部に切り込みが形成されないので、やはりバネ性や強度の問題を解消することができる。 In addition, a small triangular piece for a nail piece that is formed in advance on the side edges of each nail piece 9 that is formed near the central base 3 of both side plate parts 5 of the muscle clamping part 2. In the case of forming 19 by bending, the notch is not formed in the side edge portions of the both side plate portions 5, so that the problems of springiness and strength can be solved.

上記スペーサー本体部１から突出した鉄筋挟持用部２の両側板部５は、ここで挟持する鉄筋１０の長手方向から見て、ほぼ倒立Ω状でかつその開口部７寄りほぼ半分を斜め直線状部分１７に形成し、また上記スペーサー本体部１から突出した鉄筋挟持用部２は、両側板部５に各窓孔１２を形状すると共に、各窓孔１２でその両内側縁を繋ぐように横板部１８を形成しておき、かつ鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各１本の爪片９は、両側縁部に予め形成した爪片用の小三角片１９を折り曲げて形成しておくことが望ましい。 The both side plates 5 of the reinforcing bar sandwiching portion 2 protruding from the spacer main body 1 are substantially inverted Ω-shaped when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched here, and almost half of the half near the opening 7 is inclined linearly. Reinforcing bar sandwiching portion 2 formed in portion 17 and projecting from spacer main body 1 has side holes 5 formed on both side plate portions 5 and laterally connected to both inner edges at each window hole 12. Each of the claw pieces 9 formed with the plate portion 18 from the side of the central base portion 3 of the both-side plate portion 5 of the reinforcing bar clamping portion 2 is a small triangle for claw pieces formed in advance on both side edge portions. It is desirable to form the piece 19 by bending it.

コンクリートまたはモルタル製スペーサー本体部１の形状は、従来より各種のものがある。例えば支持される鉄筋の長手方向から見て、台形状のもの、逆台形状のもの、型枠板に当接する部分で丸みを持つもの、丸み部分が２つあるもの、平面的なもの、その他の形状がある（例えば上記特開２０００−１４５０２１号公報、特開２００１−１７３１５９号公報等参照）。また該スペーサー本体部１の大きさの内で、その高さ（カブリ寸法）Ｈは、通常は約２５ｍｍから１５０ｍｍ程度のものまで各種のサイズがある。 There are various conventional shapes of the spacer body 1 made of concrete or mortar. For example, when viewed from the longitudinal direction of the supported reinforcing bars, trapezoidal, inverted trapezoidal, rounded at the part abutting against the mold plate, two rounded, flat, etc. (See, for example, the above-mentioned Japanese Patent Laid-Open Nos. 2000-145021 and 2001-173159). Among the sizes of the spacer body 1, the height (fogging dimension) H is usually various from about 25 mm to about 150 mm.

上記鉄筋挟持用部２の大きさは、挟持する鉄筋１０を強制的に嵌合させる際にバネ性に抗して開口部７が開き、また鉄筋１０を各爪片８，９の先端部間で一旦挟持した後は、鉄筋１０が開口部７から抜け出したり、長手方向へ滑ったり、外周方向へ回動したりせぬように、換言すれば本発明に係るスペーサーＡが鉄筋１０から外れたり、長手方向へ位置ズレしたり、外周方向へ回って横を向いたりせぬように、鉄筋１０の外径Ｄをも考慮しながら、バネ性をもつ鋼板の厚み・その横幅・面積や、爪片８，９の幅・長さ等を決定する。 The size of the reinforcing bar clamping portion 2 is such that when the reinforcing bar 10 to be clamped is forcibly fitted, the opening 7 opens against the spring property, and the reinforcing bar 10 is located between the tips of the claw pieces 8 and 9. In other words, the spacer A according to the present invention is detached from the reinforcing bar 10 so that the reinforcing bar 10 does not slip out of the opening 7, slip in the longitudinal direction, or rotate in the outer peripheral direction. The thickness / width / area of the steel plate with spring properties, the nail, while taking into account the outer diameter D of the reinforcing bar 10 so as not to be displaced in the longitudinal direction or to turn to the outer circumference. The width and length of the pieces 8 and 9 are determined.

即ち、挟持する鉄筋１０はその外径Ｄが、例えば１３ｍｍ、１６ｍｍ、１９ｍｍ、２２ｍｍ、２５ｍｍ、２９ｍｍ、３２ｍｍ、３８ｍｍ等の各種があるので、それに対応して挟持する強度をもつように、鉄筋挟持用部２の鋼板の厚み、横幅等を決定しておく。また該筋挟持用部２は、特定の外径Ｄの鉄筋１０にだけ対応可能としてもよいが、それに限らない。例えば外径Ｄが１３ｍｍと１６ｍｍ用、１９ｍｍと２２ｍｍ用、２５ｍｍと２９ｍｍ用、３２ｍｍと３８ｍｍ用の如くに、２種以上の外径Ｄのものに兼用可能としてもよい。 That is, the reinforcing bar 10 to be sandwiched has various outer diameters D of, for example, 13 mm, 16 mm, 19 mm, 22 mm, 25 mm, 29 mm, 32 mm, and 38 mm. The thickness, width, etc. of the steel plate of the use part 2 are determined. The muscle clamping portion 2 may be compatible only with the reinforcing bar 10 having a specific outer diameter D, but is not limited thereto. For example, the outer diameter D may be combined with two or more kinds of outer diameters D such as 13 mm and 16 mm, 19 mm and 22 mm, 25 mm and 29 mm, and 32 mm and 38 mm.

鉄筋教示用部２の上記ほぼ倒立Ω状部分６の最大横幅は、鉄筋１０の外径Ｄよりも大きめに形成してあって、その開口部７寄りの両内側からほぼ倒立Ω状部分６のほぼ中央へ向けて、少なくとも各１本の鉄筋抜け止め兼掛止用爪片８が突設してある。また上記中央基部３寄りの両内側からもほぼ倒立Ω状部分６のほぼ中央へ向けて、各２本の鉄筋掛止用爪片９を突設してある（例えば上記図１，図３，図４等参照）。ここでほぼ中央とは、必ずしも正確に中央を向いていなくてもよいという意味である。 The maximum lateral width of the substantially inverted Ω-shaped portion 6 of the reinforcing bar teaching portion 2 is formed to be larger than the outer diameter D of the reinforcing bar 10, and the substantially inverted Ω-shaped portion 6 from both inner sides near the opening 7 is formed. At least one reinforcing bar retaining and latching claw piece 8 protrudes substantially toward the center. In addition, two rebar hooking claw pieces 9 are provided so as to project from both inner sides near the central base 3 toward substantially the center of the inverted Ω-shaped portion 6 (for example, FIGS. (See FIG. 4). Here, “substantially in the center” means that it does not necessarily have to face the center accurately.

上記で、ほぼ倒立Ω状部分６のほぼ中央を間に対向状に突設した各爪片８，９は、その先端部間で鉄筋１０の外周面を挟持・掛止可能に、鉄筋１０の長手方向から見て、両爪片８，９の先端部間の間隔Ｓを、鉄筋１０の外径Ｄより少し小さくなるようにしてある。例えば鉄筋１０の外径Ｄが約１０ｍｍならばその間隔Ｓを約８ｍｍ程度としておけばよい。しかしそれに限らず、鉄筋挟持用部２が２種以上の外径Ｄの鉄筋１０に対応可能としたものでは、上記間隔Ｓは小径の方の鉄筋１０の外径Ｄよりも小さくしておけばよい。 As described above, the claw pieces 8 and 9 projecting from the substantially center of the inverted Ω-shaped portion 6 so as to face each other, so that the outer peripheral surface of the reinforcing bar 10 can be sandwiched and hooked between the tips thereof. When viewed from the longitudinal direction, the distance S between the tips of the two claw pieces 8 and 9 is made slightly smaller than the outer diameter D of the reinforcing bar 10. For example, if the outer diameter D of the reinforcing bar 10 is about 10 mm, the interval S may be set to about 8 mm. However, the present invention is not limited to this, and in the case where the reinforcing bar holding portion 2 can cope with two or more types of the reinforcing bars 10 having the outer diameter D, the interval S should be smaller than the outer diameter D of the reinforcing bar 10 having the smaller diameter. Good.

上記各爪片８，９を突設させる位置や数は、開口部７寄り両内側の爪片８を両側板部５の幅方向の中間位置から各１本とし、中央基部３寄りからの爪片９を両側板部５の幅方向の両外側縁から各２本とすればよいが（例えば上記図１，図３，図５参照）、それに限るものではない。 The positions and number of the protrusions 8 and 9 projecting from each other are such that the inner claw pieces 8 near the opening 7 are one each from the intermediate position in the width direction of both side plate parts 5, and the claw is located near the center base 3. The number of the pieces 9 may be two from the both outer edges in the width direction of the both side plate portions 5 (see, for example, FIGS. 1, 3 and 5 above), but is not limited thereto.

例えば、開口部７寄りからの爪片８は各２本以上としてもよいし、中央基部３寄りからの爪片９は両側板部５を窓孔１２の両内側縁から各２本を形成してもよい（例えば図９参照）。また図示は省略するが、中央基部３寄りからの爪片９を、両外側縁と両内側縁から各２本ずつとしたり、両側板部５の内・外側縁間の幅方向の中間位置に切り起こして形成してもよい。 For example, two or more claw pieces 8 near the opening 7 may be provided, and two claw pieces 9 near the central base 3 may be formed by forming two side plates 5 from both inner edges of the window hole 12. (See, for example, FIG. 9). Although not shown in the figure, two claw pieces 9 from the central base 3 side are provided at both the outer edge and the inner edge, or at the intermediate position in the width direction between the inner and outer edges of the side plates 5. It may be cut and raised.

挟持した鉄筋１０がぐらつかぬように両側板部５の横幅を大きくした場合に、バネ性が強くなり過ぎるようなら、両側板部５に窓孔１２を形成しておいてもよい（例えば図１，図３，図１０，図１１等参照）。この窓孔１２は、型枠内にコンクリートを流し込んだ際に影になる部分を無くす意味もある。 If the lateral width of the side plate portions 5 is increased so that the sandwiched reinforcing bars 10 do not wobble, if the spring property becomes too strong, window holes 12 may be formed in the side plate portions 5 (for example, FIG. 1). FIG. 3, FIG. 10, FIG. 11 etc.). This window hole 12 also has the meaning which eliminates the part which becomes a shadow when concrete is poured in a formwork.

なお、上記中央基部３寄りからの爪片９を、両側板部５の両側縁の切り起こしで形成したり、窓孔１２を形成することで、両側板部５のバネ性や強度が弱くなるような場合は、各窓孔１２の両側内縁を跨ぐように横板部１８を形成しておけばよい（図１０，図１１，図１２参照）。鉄筋挟持用部２には、例えばクロムメッキその他の防錆用の表面処理を施しておくことが望ましい。 In addition, the spring property and intensity | strength of the both-sides board part 5 become weak by forming the nail | claw piece 9 near the said center base 3 by cutting and raising the both-sides edge of the both-sides board part 5, or forming the window hole 12. In such a case, the horizontal plate portion 18 may be formed so as to straddle both inner edges of each window hole 12 (see FIGS. 10, 11, and 12). It is desirable that the reinforcing bar clamping portion 2 is subjected to, for example, chrome plating or other surface treatment for rust prevention.

図１ないし図９は、本発明に係る鉄筋コンクリート施工用スペーサーＡの第１の実施例を示すものであり、図１はその全体斜視図、図２は鉄筋１０へ取付け後の斜視図、図３は鉄筋挟持用部２だけの斜視図で、図４は図１を鉄筋の長手方向から見た側面図、図５は鉄筋挟持用部にプレス加工前の鋼板の斜視図である。 FIGS. 1 to 9 show a first embodiment of a reinforced concrete construction spacer A according to the present invention, FIG. 1 is an overall perspective view thereof, FIG. 2 is a perspective view after being attached to a reinforcing bar 10, and FIG. Fig. 4 is a perspective view of only the reinforcing bar holding portion 2, Fig. 4 is a side view of Fig. 1 as viewed from the longitudinal direction of the reinforcing bar, and Fig. 5 is a perspective view of a steel plate before pressing the reinforcing bar holding portion.

１はスペーサー本体部を示し、コンクリート製でもよいが、ここではモルタル製としてあり、その形状は支持される鉄筋の長手方向から見て逆台形状をしており、鉄筋挟持用部２を突設する内向き面１４が平面状で、型枠板１３に当接する外向き面１５が丸みを持つ形状に形成してある。しかし該スペーサー本体部１の形状は、これに限らず、公知のような他の形状としてもよいことは勿論である。スペーサー本体部１の大きさの内、カブリ寸法Ｈ即ち鉄筋１０の外側に充填され被されるコンクリートの厚みを決める寸法は、ここでは約５０ｍｍとしてある。 Reference numeral 1 denotes a spacer main body, which may be made of concrete, but here is made of mortar, and its shape is an inverted trapezoidal shape as viewed from the longitudinal direction of the supported reinforcing bar, and the reinforcing bar clamping part 2 is provided in a protruding manner. The inwardly facing surface 14 is flat and the outwardly facing surface 15 in contact with the formwork plate 13 is rounded. However, the shape of the spacer body 1 is not limited to this, and may be other known shapes. Of the size of the spacer main body 1, the fogging dimension H, that is, the dimension that determines the thickness of the concrete filled and covered outside the reinforcing bar 10 is about 50 mm here.

２は鉄筋挟持用部を示し、その中央基部３から延長した足片部４をスペーサー本体部１に埋め込んで、これと一体化してある。ここでは挟持する鉄筋１０の外径Ｄが約１３ｍｍと１６ｍｍに対応可能としたので、該鉄筋挟持用部２は厚さ約０．８ｍｍ、横幅約２０ｍｍ、長さ約７０ｍｍの横長状の鋼板を用いて、プレス加工により図５で示した形状に打ち抜くと共に、湾曲形成したものある。該鋼板には、両側板部５になった際に各側で窓孔１２となる窓孔用孔を形成してある Reference numeral 2 denotes a reinforcing bar holding portion, in which a foot piece portion 4 extended from the central base portion 3 is embedded in the spacer main body portion 1 and integrated therewith. Here, since the outer diameter D of the rebar 10 to be clamped can correspond to about 13 mm and 16 mm, the rebar holding part 2 is a horizontally long steel plate having a thickness of about 0.8 mm, a width of about 20 mm, and a length of about 70 mm. Used to be punched into the shape shown in FIG. 5 by pressing and curved. The steel plate is formed with a hole for a window hole that becomes a window hole 12 on each side when the side plate portions 5 are formed.

上記鉄筋挟持用部２の長手方向の中央部には、横幅方向へ平面状の中央基部３を形成してあり、その両側縁からはスペーサー本体部１内へ埋め込まれる長さ約１５ｍｍで鉤形の２本の足片部４を有している。 A flat central base 3 is formed in the widthwise direction at the central portion of the longitudinal direction of the reinforcing bar sandwiching portion 2, and has a bowl shape with a length of about 15 mm embedded in the spacer body 1 from both side edges thereof. The two leg pieces 4 are provided.

上記鉄筋挟持用部２は、上記スペーサー本体部１から両側板部５が突出しており、挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状に湾曲形成され、両側端が外側向きに開いた開口部７が形成されている。ほぼ倒立Ω状部分６の最大横幅はここでは約２０ｍｍになっている。 The rebar sandwiching portion 2 has both side plate portions 5 projecting from the spacer main body 1 and is curved in an inverted Ω shape when viewed from the longitudinal direction of the rebar 10 to be sandwiched, and both side ends open outward. An opening 7 is formed. The maximum width of the inverted Ω-shaped portion 6 is about 20 mm here.

またここでの上記ほぼ倒立Ω状部分は、図１，図３，図４，図８等で明らかなように、そこで挟持する鉄筋１０の長手方向から見て、中央基部３寄りをほぼ半円形状部分としてあるが、開口部７寄りのほぼ半分を斜め直線状部分１７に形成してある。 In addition, as shown in FIGS. 1, 3, 4 and 8, etc., the substantially inverted Ω-shaped portion here is substantially semicircular toward the center base 3 as viewed from the longitudinal direction of the reinforcing bar 10 sandwiched there. Although it is a shape portion, almost half of the opening portion 7 is formed in the oblique linear portion 17.

上記開口部７寄りの両側板部５からは、上記ほぼ倒立Ω状部分６のほぼ中央へ向けてここでは各１本の爪片８を突設すると共に、中央基部３寄りからも、ほぼ倒立Ω状部分６のほぼ中央へ向けてここでは各２本の爪片９を突設してある。 From both side plate portions 5 near the opening 7, one claw piece 8 protrudes toward the substantially center of the substantially inverted Ω-shaped portion 6, and is also almost inverted from the vicinity of the central base 3. Here, two claw pieces 9 are provided so as to project substantially toward the center of the Ω-shaped portion 6.

開口部７寄りからの各１本の爪片８は、ここでは両側板部５の幅方向の中間位置から突設してあり、また中央基部３寄りからの各２本の爪片９は、ここでは両側板部５の横幅方向の両外側縁部から突設してある。各爪片８，９はここではプレス加工による切り起こしで形成してある。 Each of the claw pieces 8 from the vicinity of the opening 7 protrudes from the intermediate position in the width direction of the side plate portions 5 here, and each of the two claw pieces 9 from the side of the central base 3 Here, it protrudes from the both outer side edge parts of the horizontal width direction of the both-sides board part 5. As shown in FIG. Each claw piece 8, 9 is formed by cutting and raising by pressing.

上記対向状の上記各爪片８，９は、各先端部で鉄筋１０の外周面に強く当接可能に、図４で示す如く挟持する鉄筋１０の長手方向から見た両先端部間の間隔Ｓを、鉄筋１０の外径Ｄより少し小さくなるように形成してある。 The opposed claw pieces 8 and 9 are spaced from each other as viewed from the longitudinal direction of the reinforcing bar 10 to be held as shown in FIG. S is formed to be slightly smaller than the outer diameter D of the reinforcing bar 10.

ここでは上記の如く、外径Ｄが約１３ｍｍと約１６ｍｍの鉄筋１０に対応可能としたので、対向状の各爪片８，９の先端部間の間隔Ｓを約１１ｍｍとしてあるが、鉄筋１０の外径Ｄが１３ｍｍのものに対しては約２．０ｍｍ、外径Ｄが１６ｍｍのものに対しては約５．０ｍｍ、小さくなるようにしておく。 Here, as described above, since the outer diameter D can correspond to the reinforcing bars 10 having the outer diameter D of about 13 mm and about 16 mm, the interval S between the tip portions of the opposing claw pieces 8 and 9 is set to about 11 mm. The outer diameter D is about 2.0 mm when the outer diameter D is 13 mm, and about 5.0 mm when the outer diameter D is 16 mm.

上記各鉄筋挟持用部２には、防錆用にここではクロムメッキを施してあり、また該鉄筋挟持用部２の両側板部５には、各々窓孔１２を形成してある。 The reinforcing bar clamping portions 2 are chrome-plated here for rust prevention, and the side plate portions 5 of the reinforcing bar clamping portions 2 are respectively formed with window holes 12.

上記スペーサーＡの製造は、上記ほぼ倒立Ω状に成形した鉄筋挟持用部２を、その中央基部３から延長した足片部４がスペーサー本体成形用の型枠内に没入した状態にして、モルタルを流し込み乾燥させることにより、足片部４がスペーサー本体部１に埋め込まれた一体物にする。 The spacer A is manufactured by placing the reinforcing bar clamping part 2 formed in the above inverted Ω shape into a state where the foot piece part 4 extended from the central base part 3 is immersed in the mold for forming the spacer body. The foot piece 4 is made into an integral body embedded in the spacer body 1 by pouring and drying.

次に、図１０ないし図１２は、本発明に係る鉄筋コンクリート施工用スペーサーＡの第２の実施例を示すものであるが、上記実施例との相違点を中心に説明する。図１０はその全体斜視図、図１１鉄筋挟持用部２だけの斜視図で、図１２は鉄筋挟持用部にプレス加工前の鋼板の斜視図である。 Next, FIG. 10 to FIG. 12 show a second embodiment of the reinforced concrete construction spacer A according to the present invention, and the difference from the above embodiment will be mainly described. 10 is a perspective view of the whole, FIG. 11 is a perspective view of only the reinforcing bar holding portion 2, and FIG. 12 is a perspective view of a steel plate before pressing the reinforcing bar holding portion.

１はスペーサー本体部を示し、上記と同様にここではモルタル製としてあり、その形状は支持される鉄筋の長手方向から見て逆台形状をしている。該スペーサー本体部１の大きさの内、カブリ寸法Ｈ即ち鉄筋１０の外側に充填され被されるコンクリートの厚みを決める寸法は、ここでも約５０ｍｍとしてある。 Reference numeral 1 denotes a spacer main body, which is made of mortar in the same manner as described above, and has a reverse trapezoidal shape when viewed from the longitudinal direction of the supported reinforcing bar. Of the size of the spacer body 1, the fogging dimension H, that is, the dimension that determines the thickness of the concrete filled and covered outside the reinforcing bar 10 is also about 50 mm.

２は鉄筋挟持用部を示し、その中央基部３から延長した足片部４をスペーサー本体部１に埋め込んで、これと一体化してある。ここでも挟持する鉄筋１０の外径Ｄが約１３ｍｍと１６ｍｍに対応可能としたので、該鉄筋挟持用部２は厚さ約０．８ｍｍ、横幅約２０ｍｍ、長さ約７０ｍｍの横長状の鋼板を用いて、プレス加工により図１２で示した形状に打ち抜くと共に湾曲形成したものある。 Reference numeral 2 denotes a reinforcing bar holding portion, in which a foot piece portion 4 extended from the central base portion 3 is embedded in the spacer main body portion 1 and integrated therewith. Since the outer diameter D of the reinforcing bar 10 to be clamped can be set to about 13 mm and 16 mm, the reinforcing bar clamping portion 2 is a horizontally long steel plate having a thickness of about 0.8 mm, a horizontal width of about 20 mm, and a length of about 70 mm. It is used to be punched into a shape shown in FIG.

上記鋼板には、ここでもほぼ倒立Ω状に湾曲して両側板部５になった際に各側で窓孔１２となる窓孔用孔を形成してあるが、各側で窓孔１２間を跨いで内側縁間を繋ぐように横板部１８を形成してある。また該鋼板の両側縁の外側には、爪片用の小三角片１９を４箇所形成してある。 The above steel plate is also formed with a hole for a window hole which becomes a window hole 12 on each side when it is curved into an inverted Ω shape to form both side plate parts 5. The horizontal plate portion 18 is formed so as to connect the inner edges across. Four small triangular pieces 19 for claw pieces are formed on the outer sides of both side edges of the steel plate.

上記鉄筋挟持用部２は、上記実施例と同様に、スペーサー本体部１から両側板部５が突出しており、挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状に湾曲形成され、両側端で外側向きに開いた開口部７が形成されている。ほぼ倒立Ω状部分６の最大横幅はここでは約２０ｍｍになっている。 As in the above embodiment, the reinforcing bar clamping portion 2 has both side plate portions 5 projecting from the spacer main body 1 and is formed in a curved shape in an inverted Ω shape when viewed from the longitudinal direction of the reinforcing bar 10 to be clamped. An opening 7 that is open outward is formed. The maximum width of the inverted Ω-shaped portion 6 is about 20 mm here.

ここでの上記ほぼ倒立Ω状部分も、図１１，図１２で明らかなように、そこで挟持する鉄筋１０の長手方向から見て、中央基部３寄りをほぼ半円形状部分として、開口部７寄りのほぼ半分を斜め直線状部分１７に形成してある。 As shown in FIGS. 11 and 12, the substantially inverted Ω-shaped portion here is also close to the opening 7, with the central base 3 side being a substantially semicircular portion when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched there. Is formed in the diagonally linear portion 17.

上記開口部７寄りの両側板部５からは、ここでも上記ほぼ倒立Ω状部分６のほぼ中央へ向けて各１本の爪片８を突設すると共に、中央基部３寄りからもほぼ倒立Ω状部分６のほぼ中央へ向けてここでは各２本の爪片９を突設してある。中央基部３寄りからの各２本の爪片９は、ここでは上記両側縁外側に側方へ向けて突設した爪片用の小三角片１９を折り曲げて形成したものである。 From both side plate portions 5 near the opening 7, one claw piece 8 protrudes from the both side plate portions 5 toward the substantially center of the substantially inverted Ω-shaped portion 6. Here, two claw pieces 9 are provided so as to project substantially toward the center of the shaped portion 6. Each of the two claw pieces 9 from the vicinity of the center base 3 is formed by bending a small triangular piece 19 for claw pieces protruding outward from the both side edges.

上記対向状の上記各爪片８，９は、ここでも各先端部で鉄筋１０の外周面に強く当接可能に、上記実施例と同様に挟持する鉄筋１０の長手方向から見た両先端部間の間隔Ｓを、鉄筋１０の外径Ｄより少し小さくなるように形成してある。即ち、この実施例でも外径Ｄが約１３ｍｍと約１６ｍｍの鉄筋１０に対応可能としたので、対向状の各爪片８，９の先端部間の間隔Ｓを約１１ｍｍとしておくが、鉄筋１０の外径Ｄが１３ｍｍのものに対しては約２．０ｍｍ、外径Ｄが１６ｍｍのものに対しては約５．０ｍｍ、小さくなるようにしておく。 The opposing claw pieces 8 and 9 are both tip portions viewed from the longitudinal direction of the reinforcing bar 10 sandwiched in the same manner as in the above embodiment so that the tip portions can be strongly contacted with the outer peripheral surface of the reinforcing bar 10 at the respective tip portions. The interval S between them is formed to be slightly smaller than the outer diameter D of the reinforcing bar 10. That is, in this embodiment, since the outer diameter D can correspond to the reinforcing bars 10 having the outer diameter D of about 13 mm and about 16 mm, the interval S between the tip portions of the opposing claw pieces 8 and 9 is set to about 11 mm. The outer diameter D is about 2.0 mm when the outer diameter D is 13 mm, and about 5.0 mm when the outer diameter D is 16 mm.

上記各鉄筋挟持用部２にも、防錆用にここではクロムメッキを施してあり、また該鉄筋挟持用部２の両側板部５には、各々窓孔１２を形成してある。 Each of the reinforcing bar holding portions 2 is also chrome-plated here for rust prevention, and each side plate portion 5 of the reinforcing bar holding portion 2 has a window hole 12 formed therein.

このスペーサーＡの製造も上記実施例と同様に、上ほぼ倒立Ω状に成形した鉄筋挟持用部２を、その中央基部３から延長した足片部４がスペーサー本体成形用の型枠内に没入した状態にして、モルタルを流し込み乾燥させることにより、足片部４がスペーサー本体部１に埋め込まれた一体物にしたものである。 The spacer A is manufactured in the same manner as in the above-described embodiment. The rebar clamping portion 2 formed in an inverted Ω shape is formed so that the foot piece portion 4 extending from the central base portion 3 is immersed in the mold for forming the spacer body. In this state, mortar is poured and dried, so that the foot piece 4 is integrated into the spacer main body 1.

上記スペーサーＡの使用状態は、第１および第２の実施例でほぼ同じであるから、第１の実施例のものによって説明する。
まず底部の型枠板１３と水平状の横鉄筋１０との間へ介装させる場合には、該横鉄筋１０を少し持ち上げて底部の型枠板１３上に、本発明のスペーサーＡを載置し、上方で開いた鉄筋挟持用部２の開口部７に、上方から鉄筋１０を乗せて該横鉄筋１０を手で押し下げるかまたは足で踏み込めばよい。 Since the usage state of the spacer A is substantially the same in the first and second embodiments, the spacer A will be described with reference to the first embodiment.
First, when interposing between the bottom formwork plate 13 and the horizontal horizontal rebar 10, the horizontal rebar 10 is slightly lifted and the spacer A of the present invention is placed on the bottom formwork plate 13. Then, the reinforcing bar 10 may be put on the opening 7 of the reinforcing bar holding part 2 opened from above and the horizontal reinforcing bar 10 may be pushed down by hand or stepped on with a foot.

これで、該横鉄筋１０は鉄筋挟持用部２の開口部７から、開口部７寄り両内側の爪片８間をバネ力に抗して押し拡げ、ほぼ倒立Ω状部分６内の各爪片８，９の先端部間へ係合して掛止される（例えば図６参照）。 Thus, the horizontal reinforcing bar 10 expands between the claw pieces 8 on both inner sides near the opening 7 from the opening 7 of the reinforcing bar clamping portion 2 against the spring force, and each nail in the inverted Ω-shaped portion 6 is substantially expanded. It engages and engages between the front-end | tip parts of the piece 8 and 9 (for example, refer FIG. 6).

また本スペーサーＡを、側部の型枠板と垂直状の縦鉄筋１０との間に介装させる場合には、側部の型枠板は未だ設けられていないから、本発明のスペーサーＡの鉄筋挟持用部２の開口部７を、縦鉄筋１０の外側方から当てがってスペーサー本体部１を縦鉄筋１０側へ押圧すればよい。 Further, when the spacer A is interposed between the side formwork plate and the vertical longitudinal reinforcing bar 10, the side formwork plate is not yet provided. What is necessary is just to press the spacer main-body part 1 to the vertical reinforcement 10 side by applying the opening part 7 of the reinforcement pinching part 2 from the outer side of the vertical reinforcement 10.

これで、開口部７寄り両内側の爪片８間がバネ力に抗して拡がり、倒立したほぼ倒立Ω状部分６が該縦鉄筋１０に套合して、各爪片８，９の先端部間で縦鉄筋の外周面を掛止することになる（例えば図７参照）。側部の型枠板は、その後にスペーサー本体部１の外側面１５に当接するように設置すればよい。 As a result, the gap between the inner claw pieces 8 near the opening 7 spreads against the spring force, and the inverted substantially inverted Ω-shaped portion 6 is engaged with the vertical rebar 10 so that the tips of the claw pieces 8 and 9 The outer circumferential surface of the vertical reinforcing bar is hooked between the parts (see, for example, FIG. 7). What is necessary is just to install the formwork board of a side part so that it may contact | abut to the outer surface 15 of the spacer main body part 1 after that.

上記により、本発明に係るスペーサーＡは、鉄筋挟持用部２のほぼ倒立Ω状部分６で鉄筋１０に套合して、開口部７寄り両内側の爪片８と中央基部３寄り両内側の爪片９との各先端部間で、バネ力で鉄筋１０の外周面を強く掛止・挟持した状態で介装されることになる（例えば上記図２，図６，図７，図８参照）。Ｓ1 は鉄筋１０を挟持した際の対向状の両爪片８，９間の間隔を示す。 As described above, the spacer A according to the present invention is engaged with the reinforcing bar 10 at the substantially inverted Ω-shaped portion 6 of the reinforcing bar holding portion 2 and is located on both inner sides near the opening 7 and the central base 3. Between the tip portions of the claw pieces 9, the outer peripheral surface of the reinforcing bar 10 is strongly clamped and clamped by a spring force (for example, see FIGS. 2, 6, 6, 7 and 8 above). ). S1 indicates the distance between the opposing claws 8 and 9 when the reinforcing bar 10 is sandwiched.

設置作業は上記のように、鉄筋１０と鉄筋挟持用部２の開口部７とを当てがって、鉄筋１０またはスペーサー本体部１を相手側へ押圧するという作業だけで済むので、各鉄筋１０と各型枠板１３との間に多数個の本発明のスペーサーＡを設置する作業を、容易・迅速に行えるようになる。 As described above, the installation work only needs to be performed by placing the reinforcing bar 10 and the opening 7 of the reinforcing bar holding part 2 and pressing the reinforcing bar 10 or the spacer body 1 to the other side. And a plurality of spacers A according to the present invention can be easily and quickly performed between the mold plates 13.

その後、型枠内へコンクリートを流し込めばよいが、その際に圧縮荷重やバイブレータの振動等が鉄筋１０や本発明のスペーサーＡに加わる。しかし本発明に係るスペーサーＡは、上記のように鉄筋挟持用部２のほぼ倒立Ω状部分６の各爪片８，９の先端部間で鉄筋１０に套合して、ほぼ倒立Ω状部分６での両側方からのバネ力で、鉄筋１０の外周面を強く掛止・挟持している。 Thereafter, concrete may be poured into the mold, and at that time, a compressive load, vibration of the vibrator, and the like are applied to the reinforcing bar 10 and the spacer A of the present invention. However, the spacer A according to the present invention is engaged with the reinforcing bar 10 between the tips of the claw pieces 8 and 9 of the substantially inverted Ω-shaped part 6 of the reinforcing bar clamping part 2 as described above, and is substantially inverted Ω-shaped part. 6, the outer peripheral surface of the reinforcing bar 10 is strongly latched and held by the spring force from both sides.

そのため、本スペーサーＡの鉄筋挟持用部２のほぼ倒立Ω状部分６内に一旦係合した鉄筋１０は、開口部７から抜け出そうとしても開口部７寄り両内側の爪片８で掛止されて、開口部７から抜け出てしまうようなことはない。換言すれば、本発明のスペーサーＡが、鉄筋１０から外れてしまうことは阻止されている。 Therefore, the rebar 10 once engaged in the substantially inverted Ω-shaped portion 6 of the rebar sandwiching portion 2 of the spacer A is hooked by the claw pieces 8 on both inner sides close to the opening 7 even if it comes out of the opening 7. Thus, it does not come out of the opening 7. In other words, the spacer A of the present invention is prevented from coming off the reinforcing bar 10.

また本スペーサーＡは、上記開口部７寄りからの爪片８と中央基部３寄りからの爪片９の各先端部間によって、鉄筋１０の外周面を四方からバネ力で強く掛止・挟持している。しかも、鉄筋１０外周には等間隔状に環状凸条部１１が形成されている。そのため、本発明のスペーサーＡは、鉄筋１０との間で充分に挟持・掛止されており、鉄筋１０の長手方向へ滑って位置ズレするようなことがない。 In addition, the spacer A strongly holds and clamps the outer peripheral surface of the reinforcing bar 10 from four directions with spring force between the tip portions of the claw piece 8 near the opening 7 and the claw piece 9 near the central base 3. ing. Moreover, annular ridges 11 are formed on the outer periphery of the reinforcing bar 10 at equal intervals. Therefore, the spacer A of the present invention is sufficiently sandwiched and latched between the reinforcing bars 10 and does not slip and shift in the longitudinal direction of the reinforcing bars 10.

さらに上記の如く、本スペーサーＡは上記開口部７寄りからの爪片８と中央基部３寄りからの爪片９との各先端部間により、鉄筋１０の外周面を四方からバネ力で強く掛止・挟持していることにより、本スペーサーＡが鉄筋１０の外周方向で回って、横を向いてしまうようなことも生じない。 Further, as described above, the spacer A strongly applies the outer peripheral surface of the reinforcing bar 10 from the four sides by the spring force between the tip portions of the claw piece 8 near the opening 7 and the claw piece 9 near the central base 3. By stopping and clamping, the spacer A does not turn around in the outer peripheral direction of the reinforcing bar 10 and turn sideways.

また上記いずれのスペーサーＡも、鉄筋挟持用部２のほぼ倒立Ω状部分６を、そこで挟持する鉄筋１０の長手方向から見て、開口部７寄りのほぼ半分を斜め直線状部分１７に形成してある（例えば図１，図３，図４，図８等参照）。 Each of the spacers A is formed by forming the substantially inverted Ω-shaped portion 6 of the reinforcing bar sandwiching portion 2 in the oblique linear portion 17 as viewed from the longitudinal direction of the reinforcing bar 10 sandwiched there, and almost half of the portion near the opening 7. (See FIG. 1, FIG. 3, FIG. 4, FIG. 8, etc.).

これにより、鉄筋の長手方向から見てほぼ倒立Ω状部分６の両側からのバネ力の挟持・掛止に加えて、その開口部７寄りほぼ半分の両側斜め直線状部分１７が、中央基部３寄りのほぼ半円形状部分との境界である屈曲状部１６を支点として、斜め内側方向へバネ力を作用させることになる（例えば図８参照）。そのため、そこで挟持される鉄筋１０は、中心基部３寄りの両爪片９側へ一層強く押し付けられており、本スペーサーＡと鉄筋１０との間の挟持・掛止がより強固なものになっている。 As a result, in addition to the clamping and latching of the spring force from both sides of the inverted Ω-shaped portion 6 when viewed from the longitudinal direction of the reinforcing bar, the diagonally straight portions 17 on both sides almost half of the opening 7 are formed on the central base 3. A spring force is applied in an obliquely inward direction with the bent portion 16 that is a boundary with the nearly semicircular shape portion as a fulcrum (see, for example, FIG. 8). Therefore, the reinforcing bars 10 held there are pressed more strongly toward the two claw pieces 9 near the center base 3, and the holding / holding between the spacer A and the reinforcing bars 10 becomes stronger. Yes.

なお、上記第２の実施例のように、各窓孔１２でその両内側縁を繋ぐように横板部１８を形成したり、また両側板部５の中央基部３寄りからの爪片９を、両側縁部に形成した爪片用の小三角片１９を折り曲げることで突設させたものでは、より一層バネ性や強度を有するものになっている。 As in the second embodiment, the horizontal plate portion 18 is formed so as to connect the inner edges of each window hole 12, or the nail pieces 9 from the side of the central base portion 3 of the both side plate portions 5 are attached. The one provided by bending the small triangular pieces 19 for the claw pieces formed on both side edges has more springiness and strength.

本発明に係る鉄筋コンクリート施工用スペーサーの一実施例の斜視図である。It is a perspective view of one Example of the spacer for reinforced concrete construction which concerns on this invention. 図１で示した本発明のスペーサーを、鉄筋に取付けた状態の斜視図である。It is a perspective view of the state which attached the spacer of this invention shown in FIG. 1 to the reinforcing bar. 図１で示した本発明のスペーサーの鉄筋挟持用部の斜視図である。It is a perspective view of the reinforcing bar holding part of the spacer of the present invention shown in FIG. 図１で示した本発明のスペーサーを、鉄筋の長手方向から見た側面図である。It is the side view which looked at the spacer of this invention shown in FIG. 1 from the longitudinal direction of the reinforcing bar. 図３で示した鉄筋挟持用部に湾曲形成する前の鋼板の斜視図である。It is a perspective view of the steel plate before curve-forming in the reinforcing bar clamping part shown in FIG. 図１で示した本発明のスペーサーを横鉄筋への取付け時の側面図である。It is a side view at the time of the attachment of the spacer of this invention shown in FIG. 1 to a horizontal reinforcement. 図１で示した本発明のスペーサーを縦鉄筋への取付け時の平面図である。It is a top view at the time of the attachment of the spacer of this invention shown in FIG. 1 to a vertical reinforcing bar. 図１で示した本発明のスペーサーの鉄筋挟持用部で、鉄筋を掛止・挟持する状態を示す側面図である。It is a side view which shows the state which latches and clamps a reinforcing bar in the reinforcing bar clamping part of the spacer of this invention shown in FIG. 本発明に係る鉄筋コンクリート施工用スペーサーの他の実施例を示す斜視図である。It is a perspective view which shows the other Example of the spacer for reinforced concrete construction which concerns on this invention. 本発明に係る鉄筋コンクリート施工用スペーサーの他の実施例の斜視図である。It is a perspective view of the other Example of the spacer for reinforced concrete construction which concerns on this invention. 図１０で示した本発明のスペーサーの鉄筋挟持用部の斜視図である。It is a perspective view of the reinforcing bar holding part of the spacer of the present invention shown in FIG. 図１１で示した鉄筋挟持用部に湾曲形成する前の鋼板の斜視図である。It is a perspective view of the steel plate before curve-forming in the reinforcing bar clamping part shown in FIG.

符号の説明Explanation of symbols

Ａ−スペーサー
１−スペーサー本体部
２−鉄筋挟持用部
３−中央基部
４−足片部
５−側板部
６−ほぼ倒立Ω状部
７−開口部
８−爪片
９−爪片
１０−鉄筋
１１−環状凸条部
１２−窓孔
１３−型枠板
１４−内向き面
１５−外向き面
１６−屈曲状部
１７−直線状部分
１８−横板部
１９−小三角片
Ｓ−間隔
Ｓ1-間隔
Ｄ−直径
Ｈ−カブリ寸法

A-spacer 1-spacer body part 2-rebar clamping part 3-center base part 4-foot piece part 5-side plate part 6-inverted Ω-shaped part 7-opening part 8-claw piece 9-claw piece 10-reinforcing bar 11 -Annular ridge part 12-Window hole 13-Formwork plate 14-Inward surface 15-Outward surface 16-Bent part 17-Linear part 18-Horizontal plate part 19-Small triangular piece S-Spacing S1-Spacing D-Diameter H-Fog size

Claims

コンクリートまたはモルタル製のスペーサー本体部１に、バネ性をもつ金属板製の鉄筋挟持用部２を、中央基部３近傍の足片部４を埋め込んで一体化したものであり、
スペーサー本体部１から突出した鉄筋挟持用部２の両側板部５を、ここで挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状に形成し、
開口部７寄りの両側板部５から少なくとも各１本の爪片８を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設すると共に、中央基部３寄りからも少なくとも各１本の爪片９を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設し、
鉄筋１０の長手方向から見て先端部が対向状の両爪片８，９間の間隔Ｓを、ここで挟持する鉄筋１０の外径Ｄより少し小さめに形成し、
かつ、鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部を切り起こして形成したことを特徴とする、鉄筋コンクリート施工用スペーサー。 The spacer main body 1 made of concrete or mortar is integrated with a reinforcing plate holding part 2 made of a metal plate having spring properties by embedding a foot piece part 4 in the vicinity of the central base part 3,
The both side plate portions 5 of the reinforcing bar clamping portion 2 protruding from the spacer body 1 are formed in an inverted Ω shape when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched here,
At least one claw piece 8 protrudes from the side plate portions 5 near the opening 7 toward the substantially center of the inverted Ω-shaped portion 6 and at least one claw piece also from the center base 3 side. 9 is projected toward almost the center of the inverted Ω-shaped portion 6 ,
The spacing S between the two claws 8,9 tip when viewed from the longitudinal direction opposite shaped rebar 10, wherein little smaller form than the outer diameter D of the reinforcing bar 10 for clamping,
And the spacer for construction of reinforced concrete characterized in that each two claw pieces 9 formed from the side of the both side plates 5 of the reinforcing bar clamping part 2 near the central base 3 are cut and raised at both side edges .

コンクリートまたはモルタル製のスペーサー本体部１に、バネ性をもつ金属板製の鉄筋挟持用部２を、中央基部３近傍の足片部４を埋め込んで一体化したものであり、
スペーサー本体部１から突出した鉄筋挟持用部２の両側板部５を、ここで挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状に形成し、
開口部７寄りの両側板部５から少なくとも各１本の爪片８を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設すると共に、中央基部３寄りからも少なくとも各１本の爪片９を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設し、
鉄筋１０の長手方向から見て先端部が対向状の両爪片８，９間の間隔Ｓを、ここで挟持する鉄筋１０の外径Ｄより少し小さめに形成し、
かつ、鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部に予め側方へ突出形成した爪片用の小三角片１９を折り曲げて形成したことを特徴とする、鉄筋コンクリート施工用スペーサー。 The spacer main body 1 made of concrete or mortar is integrated with a reinforcing plate holding part 2 made of a metal plate having spring properties by embedding a foot piece part 4 in the vicinity of the central base part 3,
The both side plate portions 5 of the reinforcing bar clamping portion 2 protruding from the spacer body 1 are formed in an inverted Ω shape when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched here,
At least one claw piece 8 protrudes from the side plate portions 5 near the opening 7 toward the substantially center of the inverted Ω-shaped portion 6 and at least one claw piece also from the center base 3 side. 9 is projected toward almost the center of the inverted Ω-shaped portion 6 ,
The spacing S between the two claws 8,9 tip when viewed from the longitudinal direction opposite shaped rebar 10, wherein little smaller form than the outer diameter D of the reinforcing bar 10 for clamping,
In addition, each of the two claw pieces 9 formed near the central base 3 of the both side plate parts 5 of the reinforcing bar clamping part 2 is bent with a small triangular piece 19 for the claw pieces formed by projecting sideways in advance on both side edges. and characterized by forming Te, the spacer reinforced concrete construction.

コンクリートまたはモルタル製のスペーサー本体部１に、バネ性をもつ金属板製の鉄筋挟持用部２を、中央基部３近傍の足片部４を埋め込んで一体化したものであり、
スペーサー本体部１から突出した鉄筋挟持用部２の両側板部５を、ここで挟持する鉄筋１０の長手方向から見てほぼ倒立Ω状で、かつその開口部７寄りのほぼ半分を斜め直線状部分１７に形成し、
開口部７寄りの両側板部５から少なくとも各１本の爪片８を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設すると共に、中央基部３寄りからも少なくとも各１本の爪片９を、ほぼ倒立Ω状部分６のほぼ中央へ向けて突設し、
かつ、鉄筋１０の長手方向から見て先端部が対向状の両爪片８，９間の間隔Ｓを、ここで挟持する鉄筋１０の外径Ｄより少し小さめに形成したことを特徴とする、鉄筋コンクリート施工用スペーサー。 The spacer main body 1 made of concrete or mortar is integrated with a reinforcing plate holding part 2 made of a metal plate having spring properties by embedding a foot piece part 4 in the vicinity of the central base part 3,
The both side plates 5 of the reinforcing bar holding portion 2 protruding from the spacer main body 1 are in an inverted Ω shape when viewed from the longitudinal direction of the reinforcing bar 10 sandwiched here, and almost half of the side near the opening 7 is an oblique straight line. Formed in part 17,
At least one claw piece 8 protrudes from the side plate portions 5 near the opening 7 toward the substantially center of the inverted Ω-shaped portion 6 and at least one claw piece also from the center base 3 side. 9 is projected toward almost the center of the inverted Ω-shaped portion 6,
And the space | interval S between the nail | claw pieces 8 and 9 with which the front-end | tip part is opposing shape seeing from the longitudinal direction of the reinforcing bar 10 was formed slightly smaller than the outer diameter D of the reinforcing bar 10 clamped here, Spacer for reinforced concrete construction.

鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部を切り起こして形成した、請求項３に記載の鉄筋コンクリート施工用スペーサー。 The spacer for reinforced concrete construction according to claim 3, wherein each of the two claw pieces 9 formed near the central base portion 3 of the both side plate portions 5 of the reinforcing bar clamping portion 2 is formed by cutting and raising both side edges.

鉄筋挟持用部２の両側板部５の中央基部３寄りから形成した各２本の爪片９を、両側縁部に予め側方へ突出形成した爪片用の小三角片１９を折り曲げて形成した、請求項３に記載の鉄筋コンクリート施工用スペーサー。 Formed by bending two claw pieces 9 formed from the sides of the both side plates 5 of the reinforcing bar sandwiching part 2 near the central base 3 by bending a small triangular piece 19 for claw pieces formed by protruding sideways in advance on both side edges. The spacer for reinforced concrete construction according to claim 3 .

ほぼ倒立Ω状の鉄筋挟持用部２の両側板部５に各窓孔１２を形状すると共に、各窓孔１２でその両内側縁を繋ぐように横板部１８を形成した、請求項１から請求項５のいずれかに記載の鉄筋コンクリート施工用スペーサー。 Each of the window holes 12 is formed in the both side plate portions 5 of the substantially inverted Ω-shaped reinforcing bar holding portion 2, and the horizontal plate portions 18 are formed so as to connect the inner edges of the window holes 12. The spacer for reinforced concrete construction according to claim 5.