JP2004353428A - Foldable plastic spacer - Google Patents

Foldable plastic spacer Download PDF

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Publication number
JP2004353428A
JP2004353428A JP2003185813A JP2003185813A JP2004353428A JP 2004353428 A JP2004353428 A JP 2004353428A JP 2003185813 A JP2003185813 A JP 2003185813A JP 2003185813 A JP2003185813 A JP 2003185813A JP 2004353428 A JP2004353428 A JP 2004353428A
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JP
Japan
Prior art keywords
walls
parts
present
concrete
shape
Prior art date
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Pending
Application number
JP2003185813A
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Japanese (ja)
Inventor
Yukio Yamazaki
幸男 山崎
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP2003185813A priority Critical patent/JP2004353428A/en
Publication of JP2004353428A publication Critical patent/JP2004353428A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic spacer foldable compact, transportable in large quantities at once since it is light in weight, and enabling an increase in working efficiency since it can easily bind an overlapped part between reinforcements. <P>SOLUTION: U-shaped or V-shaped cut parts 21, 22, 23, and 24 are formed at the upper center parts of tubular rectangular parallelopiped walls 11, 12, 13, and 14 having upper and lower opening parts forming square shapes in use. Bent parts 31, 32, 33, and 34 are formed at side parts where the rectangular parallelopiped walls 11, 12, 13, and 14 are adjacent to each other. The rectangular parallelopiped walls 11, 12, 13, and 14 are formed integrally with the bent parts 31, 32, 33, and 34. The depth of the U-shape of the cuts 21, 22, 23, and 24 is made two times or more the lateral length thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、折りたたみができるプラスチック製のスペーサーに関するものである。
【0002】
【従来の技術】
図1から図4で示すように、鉄筋コンクリート打設施工時に、あらかじめ鉄筋を縦横に配置する際、多数ある鉄筋の交差部の要所要所にスペーサー100を配置して、鉄筋を支え安定させる。
そして、スペーサー100を配置した後、コンクリートを流し込んでスペーサー100を含んだまま鉄筋コンクリート打設施工を完了させる。
この施工に使用する従来のスペーサー100は、コンクリートなどであらかじめ直方体状に成形されたものを使用していた。
【0003】
また、欠け部110の深さが浅い弓形であった。
【0004】
【発明が解決しようとする課題】
スペーサー100はコンクリートなどで直方体状に成形されているので、鉄筋の交差部の要所要所にスペーサー100を運ぶのに重く、かつ、かさばるため、1度に多くのスペーサー100を運ぶのが困難であった。
【0005】
また、欠け部110の深さが浅い弓形であったため、交差部の縦と横に2本重なった鉄筋を受ける場合、1本の鉄筋しか受けられず鉄筋が不安定であった。
【0006】
【課題を解決するための手段】
これらの欠点を取り除くために、あらかじめ直方体状に成形されたスペーサー100を使用しないで済む方法はないかと考え、請求項1と請求項2の折りたたみができるプラスチック製のスペーサーを発明した。
まず、請求項1について説明する。
下記の要件を備えて成ることを特徴とする折りたたみができるプラスチック製のスペーサー。
(イ)使用時に上下開口部が四角形状を形成する筒状の直方体の壁11,12,13,14のそれぞれの上部中央部に、U字状あるいはV字状の欠け部21,22,23,24をそれぞれ設ける。
(ロ)直方体の壁11,12,13,14が、それぞれ隣り合う辺部に、折り曲げ部31,32,33,34を設ける。
(ハ)直方体の壁11,12,13,14と折り曲げ部31,32,33,34はすべて一体になっている。
【0007】
次に、請求項2について説明する。
請求項1の欠け部21,22,23,24のU字状を、深さが横の長さの2倍以上になるようにする。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。
本発明はプラスチック製なので、プラスチック成形により生産することになる。
プラスチックには、いろいろな種類のものがあるが、本発明の使用目的からして、折り曲げや高温高圧に耐えられるプラスチックが適している。このプラスチックの1例としてポリプロピレンが望ましい。
【0009】
まず、請求項1について説明する。
図5と図6で示すように、使用時に上下開口部が四角形状を形成する筒状の直方体の壁11,12,13,14のそれぞれの上部中央部に、U字状あるいはV字状の欠け部21,22,23,24をそれぞれ成形する。
欠け部をU字状にする場合は、鉄筋の直径(9mm、13mm、16mm、21mmなどが市販されている)に合わせて成形する。
欠け部をV字状にする場合は、鉄筋の直径はどのようなものでも受けられる。鉄筋の交差部で下側になる鉄筋は安定度が増すが、上側の鉄筋の安定度は劣る。
【0010】
直方体の壁11,12,13,14が、それぞれ隣り合う辺部に、折り曲げ部31,32,33,34を成形する。
【0011】
直方体の壁11,12,13,14と折り曲げ部31,32,33,34はすべて一体になるように成形する。
【0012】
次に、請求項2について説明する。
欠け部21,22,23,24のU字状が、深さが横の長さの2倍以上であるように成形する。
例えば、欠け部21,22,23,24のU字状の横の長さを14mmにした場合、深さを28mmにする。こうすれば、交差部の2本の鉄筋は、欠け部のU字状の中に完全に納まり、鉄筋が安定する。
【0013】
【使用例】
請求項1の本発明は次の順序で使用する。
工程1:縦横に配置した鉄筋の交差部のスペーサー配置箇所に本発明を運ぶ際は、図8で示すように本発明は折りたたんでおく。本発明は、筒状でありプラスチック製なので重くなく、折りたたんであるのでかさばらず、本発明を1度に多く運ぶことができる。
工程2:スペーサー配置箇所で本発明を1つ取り出して、折りたたんである本発明を図5で示すように四角形状の筒状に戻す。
工程3:四角形状の筒状に戻した本発明を、欠け部が上になるように、敷き砂利300の上に置く。
工程4:本発明の欠け部に、縦に配置した鉄筋を入れ、次いで横に配置した鉄筋を入れ、鉄筋の交差部を針金などで結束する。
工程5:縦横に配置した鉄筋の交差部の要所要所への本発明の配置を完了させる。
工程6:鉄筋の交差部をすべて針金などで結束する。
工程7:現場にコンクリートを流し込む。
工程8:流れ込んだコンクリートは本発明の周囲に及び始める。この際、コンクリートの流れによる圧力が本発明にかかっても、本発明は鉄筋の重みを受けていることで変形は生じにくい。また、コンクリートが高温になっているが、本製品は高温に耐えられるプラスチックを使用するので問題は極めて少ない。
工程9:コンクリートが本発明の壁を超えて内部に流れ込み、本発明の内部がコンクリートで満たされる。
工程10:コンクリートが本発明や鉄筋を覆う。
【0010】
【発明の効果】
本発明を使用することによって、次のような効果を生む。
(イ)プラスチック製の筒状なので、直方体状に成形されたコンクリートなどのスペーサーに比べ軽くて運びやすくなり、作業効率が良くなる。
(ロ)折りたためるのでかさばらず、1度に多量に運べて作業効率が良くなる。
(ハ)プラスチック製なので水を吸わない。このため、コンクリートの水分度合いが安定するので、コンクリートのひび割れ防止につながる。
(ニ)プラスチック製なので、コンクリートと一緒に存在していても長時間腐らず安定するので、コンクリートのひび割れ防止につながる。
(ホ)本発明を配置してから鉄筋と鉄筋の重なり部を針金などで結束するとき、本発明の筒状による内部空間を利用できるので結束しやすく、作業効率が良くなる。
(ヘ)プラスチック製なので、量産が可能であり、製造コストを低く抑えられる。
【図面の簡単な説明】
【図1】図1は従来のスペーサーの正面図である。
【図2】図2は従来のスペーサーの上面図である。
【図3】図3は鉄筋の縦横配置例とスペーサー配置例を示す上面図である。
【図4】図4は従来のスペーサーの使用状態を示す正面図である。
【図5】図5は本発明の上面図である。
【図6】図6は本発明の正面図である。
【図7】図7は本発明の使用状態を示す正面図である。
【図8】図8は本発明を折りたたんだ状態を示す底面図である。
【符号の説明】
11,12,13,14 直方体の壁
21,22,23,24 欠け部
31,32,33,34 折り曲げ部
50a,50b・・・50n 鉄筋
60a,60b・・・60n 鉄筋
100,100a,100b・・・従来のスペーサー
110 従来のスペーサーの欠け部
200 土
300 敷き砂利
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a foldable plastic spacer.
[0002]
[Prior art]
As shown in FIGS. 1 to 4, at the time of arranging the reinforcing bars vertically and horizontally at the time of the reinforced concrete placing operation, the spacers 100 are arranged at necessary places at the intersections of a large number of reinforcing bars to support and stabilize the reinforcing bars.
After arranging the spacers 100, concrete is poured into the reinforced concrete while the spacers 100 are included, thereby completing the reinforced concrete placing operation.
The conventional spacer 100 used for this construction has been previously formed into a rectangular parallelepiped shape using concrete or the like.
[0003]
Further, the depth of the notch 110 was a shallow bow.
[0004]
[Problems to be solved by the invention]
Since the spacer 100 is formed in a rectangular parallelepiped shape by concrete or the like, it is heavy and bulky to carry the spacer 100 to a necessary portion at the intersection of the reinforcing bars, so it is difficult to carry many spacers 100 at once. there were.
[0005]
Further, since the notch 110 had a shallow bow shape, when receiving two rebars vertically and horizontally at the intersection, only one rebar was received and the rebar was unstable.
[0006]
[Means for Solving the Problems]
In order to eliminate these drawbacks, the inventors thought that there was no need to use a spacer 100 formed in a rectangular parallelepiped shape in advance, and invented a foldable plastic spacer according to claims 1 and 2.
First, claim 1 will be described.
A foldable plastic spacer characterized by having the following requirements:
(A) U-shaped or V-shaped cutouts 21, 22, 23 are formed in the upper central portions of cylindrical rectangular parallelepiped walls 11, 12, 13, and 14 of which upper and lower openings form a square shape when used. , 24 are provided.
(B) The cuboid walls 11, 12, 13, and 14 are provided with bent portions 31, 32, 33, and 34 at adjacent sides.
(C) The rectangular parallelepiped walls 11, 12, 13, 14 and the bent portions 31, 32, 33, 34 are all integrated.
[0007]
Next, claim 2 will be described.
The U-shaped portions 21, 22, 23, and 24 of the first aspect are configured so that the depth is at least twice the horizontal length.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
Since the present invention is made of plastic, it is produced by plastic molding.
Although there are various types of plastics, plastics that can withstand bending and high temperature and pressure are suitable for the purpose of the present invention. As an example of this plastic, polypropylene is desirable.
[0009]
First, claim 1 will be described.
As shown in FIGS. 5 and 6, a U-shaped or V-shaped wall is formed at the center of the upper part of each of the rectangular parallelepiped walls 11, 12, 13, and 14 whose upper and lower openings form a square shape when used. The notches 21, 22, 23 and 24 are formed respectively.
When the notched portion is formed in a U-shape, it is formed according to the diameter of a reinforcing bar (9 mm, 13 mm, 16 mm, 21 mm, or the like is commercially available).
In the case where the notched portion is formed in a V shape, any diameter of the reinforcing bar can be received. The lower rebar at the intersection of the rebars is more stable, but the upper rebar is less stable.
[0010]
The rectangular parallelepiped walls 11, 12, 13, 14 form bent portions 31, 32, 33, 34 on adjacent sides, respectively.
[0011]
The rectangular parallelepiped walls 11, 12, 13, 14 and the bent portions 31, 32, 33, 34 are all formed integrally.
[0012]
Next, claim 2 will be described.
The U-shape of the notches 21, 22, 23, 24 is formed so that the depth is at least twice the horizontal length.
For example, when the U-shaped lateral length of the notches 21, 22, 23, and 24 is 14 mm, the depth is 28 mm. In this way, the two reinforcing bars at the intersection are completely accommodated in the U-shape of the notch, and the reinforcing bars are stabilized.
[0013]
【Example of use】
The invention of claim 1 is used in the following order.
Step 1: When carrying the present invention to the spacer arrangement location at the intersection of the reinforcing bars arranged vertically and horizontally, the present invention is folded as shown in FIG. Since the present invention is cylindrical and made of plastic, it is not heavy, and it is folded so that it is not bulky, so that the present invention can be carried at a time.
Step 2: One of the present invention is taken out at the position where the spacer is arranged, and the folded present invention is returned to a square tubular shape as shown in FIG.
Step 3: The present invention, which has been returned to a square cylindrical shape, is placed on the gravel 300 so that the notch is on the top.
Step 4: A vertically arranged reinforcing bar is inserted into the notched portion of the present invention, and then a horizontally disposed reinforcing bar is inserted, and the intersection of the reinforcing bars is bound with a wire or the like.
Step 5: The arrangement of the present invention is completed at key points at intersections of the reinforcing bars arranged vertically and horizontally.
Step 6: All the intersections of the reinforcing bars are bound with a wire or the like.
Step 7: Pour concrete into the site.
Step 8: The poured concrete begins to spread around the present invention. At this time, even if the pressure due to the flow of the concrete is applied to the present invention, the present invention is hardly deformed due to the weight of the reinforcing bar. In addition, although the temperature of concrete is high, there are few problems because this product uses plastic that can withstand high temperatures.
Step 9: Concrete flows over the walls of the invention into the interior and the interior of the invention is filled with concrete.
Step 10: Concrete covers the invention and the rebar.
[0010]
【The invention's effect】
The following effects are produced by using the present invention.
(A) Since it is made of plastic, it is lighter and easier to carry than spacers made of concrete or the like formed in a rectangular parallelepiped shape, thereby improving work efficiency.
(B) Since it can be folded, it is not bulky and can be carried in large quantities at a time to improve work efficiency.
(C) It is made of plastic and does not absorb water. Therefore, the water content of the concrete is stabilized, which leads to prevention of cracking of the concrete.
(D) Since it is made of plastic, even if it is present together with concrete, it does not rot for a long time and is stable, leading to prevention of cracking of concrete.
(E) When the overlapping portions of the reinforcing bars are bound with a wire or the like after the present invention is arranged, the tubular internal space of the present invention can be used, so that the binding is easy and the working efficiency is improved.
(F) Since it is made of plastic, mass production is possible and the production cost can be kept low.
[Brief description of the drawings]
FIG. 1 is a front view of a conventional spacer.
FIG. 2 is a top view of a conventional spacer.
FIG. 3 is a top view showing an example of vertical and horizontal arrangement of reinforcing bars and an example of arrangement of spacers.
FIG. 4 is a front view showing a used state of a conventional spacer.
FIG. 5 is a top view of the present invention.
FIG. 6 is a front view of the present invention.
FIG. 7 is a front view showing a use state of the present invention.
FIG. 8 is a bottom view showing a state where the present invention is folded.
[Explanation of symbols]
11, 12, 13, 14 Rectangular walls 21, 22, 23, 24 Chipped portions 31, 32, 33, 34 Bent portions 50a, 50b ... 50n Reinforcing bars 60a, 60b ... 60n Reinforcing bars 100, 100a, 100b ..Conventional spacer 110 Chipped portion 200 of conventional spacer 200 Soil 300 Gravel

Claims (2)

下記の要件を備えて成ることを特徴とする折りたたみができるプラスチック製のスペーサー。
(イ)使用時に上下開口部が四角形状を形成する筒状の直方体の壁11,12,13,14のそれぞれの上部中央部に、U字状あるいはV字状の欠け部21,22,23,24をそれぞれ設ける。
(ロ)直方体の壁11,12,13,14が、それぞれ隣り合う辺部に、折り曲げ部31,32,33,34を設ける。
(ハ)直方体の壁11,12,13,14と折り曲げ部31,32,33,34はすべて一体になっている。
A foldable plastic spacer characterized by having the following requirements:
(A) U-shaped or V-shaped cutouts 21, 22, 23 are formed in the upper central portions of cylindrical rectangular parallelepiped walls 11, 12, 13, and 14 of which upper and lower openings form a square shape when used. , 24 are provided.
(B) The cuboid walls 11, 12, 13, and 14 are provided with bent portions 31, 32, 33, and 34 at adjacent sides.
(C) The rectangular parallelepiped walls 11, 12, 13, 14 and the bent portions 31, 32, 33, 34 are all integrated.
欠け部21,22,23,24のU字状が、深さが横の長さの2倍以上である請求項1の折りたたみができるプラスチック製のスペーサー。The foldable plastic spacer according to claim 1, wherein the U-shape of the notches 21, 22, 23, and 24 has a depth of at least twice the horizontal length.
JP2003185813A 2003-05-26 2003-05-26 Foldable plastic spacer Pending JP2004353428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003185813A JP2004353428A (en) 2003-05-26 2003-05-26 Foldable plastic spacer

Publications (1)

Publication Number Publication Date
JP2004353428A true JP2004353428A (en) 2004-12-16

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ID=34055379

Family Applications (1)

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Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110306730A (en) * 2019-06-28 2019-10-08 王本淼 The triangular member production method of monomer reinforcing bar connection
CN113323279A (en) * 2021-06-10 2021-08-31 中国十七冶集团有限公司 Concrete prefabricated fastener for controlling thickness of beam steel bar protective layer and construction method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110306730A (en) * 2019-06-28 2019-10-08 王本淼 The triangular member production method of monomer reinforcing bar connection
CN113323279A (en) * 2021-06-10 2021-08-31 中国十七冶集团有限公司 Concrete prefabricated fastener for controlling thickness of beam steel bar protective layer and construction method thereof

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