JP4318688B2 - Void formwork - Google Patents

Void formwork Download PDF

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JP4318688B2
JP4318688B2 JP2005355096A JP2005355096A JP4318688B2 JP 4318688 B2 JP4318688 B2 JP 4318688B2 JP 2005355096 A JP2005355096 A JP 2005355096A JP 2005355096 A JP2005355096 A JP 2005355096A JP 4318688 B2 JP4318688 B2 JP 4318688B2
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void
slab
mold
formwork
bubbles
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JP2007009670A (en
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忠弘 奥田
浩行 椴木
秀樹 池田
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Kurimoto Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/326—Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements
    • E04B5/328—Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements the filling elements being spherical

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent holes from being formed in the surface of a slab on the upper part of a void mold. <P>SOLUTION: In the void mold 10 formed in a flat spherical shape by a synthetic resin foam molded product, multiple stages of recessed parts 11 or projected parts 12 are formed on the surface thereof all the periphery in the lateral direction. The void molds 10 are disposed in a space held by upper side main reinforcements 1 and lower side main reinforcements 2 arranged in lattice shape in the slab S at predetermined intervals in the vertical and lateral directions along the surface direction of the slab S. By this, when a concrete 7 is deposited, air adhered to the void mold 10 or air present in the void mold is held in an adsorbed state to the recessed parts 11 or the projected parts 12 so as not to be separated. Then, air bubbles do not rise up to the surface of the concrete 7 and holes 6 are not produced. When the void mold 10 is formed of the synthetic resin foam molded product, usually bubble adsorption and holding effect to that surface cannot be expected since the surface is formed of a smooth surface. However, by forming the recessed parts 11 or the projected parts 12 for air bubble adsorption, its effect can be largely increased. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

この発明は、鉄筋コンクリート造床の中空スラブ工法に関するボイド型枠に関するものである。   The present invention relates to a void form for a hollow slab method for a reinforced concrete floor.

近年、建築物の高層化や広い居室空間確保の要請に伴い、スラブの軽量化あるいは遮音性等向上を図るために、スラブ内部に埋設物を埋め込んで中空化する工法が実用化されている。また、このような埋設物として、合成樹脂製発泡品を用いる技術が開示されている（例えば、特許文献１、特許文献２参照）。   In recent years, with the demand for higher-rise buildings and securing a large room space, a method of embedding a buried object in a slab and making it hollow has been put to practical use in order to reduce the weight of the slab or improve sound insulation. Moreover, the technique using a synthetic resin foam is disclosed as such an embedded object (for example, refer patent document 1 and patent document 2).

特開２００３−３２１８９４号公報JP 2003-321894 A 特開２００２−２６６４５７号公報JP 2002-266457 A

しかし、上記埋設物を埋め込んでコンクリートを打設する際に、その打設されるコンクリート中には、常に総体積比３〜５％程度の微細な気泡が存在する。また、そのスラブに埋め込むボイド型枠内、又はその表面に空気が残留している場合もある。
このため、図１０に示すように、コンクリート７中の気泡４が、まだ固まらないそのコンクリート７内を移動して、徐々にボイド型枠１０表面に吸着していく傾向がある（図１０（ａ）乃至図１０（ｃ）参照）。この吸着気泡５はやがて大きくなり浮力が大きくなっていく。最終的には、吸着気泡５がスラブＳの表面に浮上し（図１０（ｄ）（ｅ）の矢印Ａ参照）、その浮上した気泡５’が、ボイド型枠１０上部のスラブＳ表面（前記浮上した部分）に穴６を生じさせるという問題がある。 However, when embedding the above-mentioned buried object and placing concrete, fine bubbles having a total volume ratio of about 3 to 5% are always present in the placed concrete. Also, air may remain in the void formwork embedded in the slab or on the surface thereof.
For this reason, as shown in FIG. 10, the bubbles 4 in the concrete 7 tend to move through the concrete 7 which has not yet hardened and gradually adsorb to the surface of the void form 10 (FIG. 10 (a). ) To FIG. 10 (c)). The adsorbed bubbles 5 become larger and the buoyancy increases. Eventually, the adsorbed bubbles 5 float on the surface of the slab S (see arrows A in FIGS. 10 (d) and 10 (e)), and the floated bubbles 5 ' There is a problem that the hole 6 is generated in the floating part).

また、図１１（ａ）に示すように、吸着気泡５がボイド型枠１０の表面に吸着しながら移動して上面に至り、その位置からスラブＳ表面に浮上することにより（図１１（ａ）に示す矢印Ｂ参照）、ボイド型枠１０の直上のスラブＳ表面に、図１１（ｂ）に示す穴６を発生させる場合もある。
このような穴６は、スラブＳの仕上がり状態の美観を悪くするので好ましくない。 Further, as shown in FIG. 11 (a), the adsorbed bubbles 5 move while adsorbing on the surface of the void mold 10 and reach the upper surface, and float on the surface of the slab S from that position (FIG. 11 (a)). In some cases, the hole 6 shown in FIG. 11B is generated on the surface of the slab S immediately above the void form 10.
Such a hole 6 is not preferable because the appearance of the finished state of the slab S is deteriorated.

そこで、この発明は、ボイド型枠上部において、コンクリート打設後のスラブ表面に穴が発生しないようにすることを課題とする。   Therefore, an object of the present invention is to prevent a hole from being generated on the surface of the slab after placing the concrete in the upper part of the void formwork.

上記の課題を解決するために、この発明は、ボイド型枠に付着する空気、又は内在する空気が、コンクリートが固まるまで、そのボイド型枠から離れないようにする手段を採用したのである。ボイド型枠に付着する空気、又は内在する空気が、コンクリートが固まるまで、そのボイド型枠から離れないようにする手段としては、例えば、そのボイド型枠表面に凹部又は凸部を形成して、その凹部又は凸部に気泡が吸着して浮き上がらないようにする手法がある。また、ボイド型枠表面に気泡が浮き上がらないようにするために、ボイド型枠表面に通気性のない遮断層を設けても良い。
このようにすれば、打設したコンクリート表面に気泡が浮き上がらないので、スラブへの穴の発生を防止し得る。 In order to solve the above-mentioned problems, the present invention employs means for preventing the air adhering to the void form or the internal air from leaving the void form until the concrete is solidified. As a means for preventing the air adhering to the void formwork or the internal air from leaving the void formwork until the concrete is solidified, for example, forming a concave or convex portion on the surface of the void formwork, There is a technique for preventing bubbles from adsorbing to the concave portion or convex portion. In order to prevent bubbles from rising on the void form surface, a non-breathable blocking layer may be provided on the void form surface.
In this way, since bubbles do not float on the concrete surface that has been placed, the generation of holes in the slab can be prevented.

この発明は、打設したコンクリート表面に気泡が浮き上がらないようにしたので、ボイド型枠上部において、スラブへの穴の発生を防止し得る。   In the present invention, since air bubbles are prevented from floating on the cast concrete surface, generation of holes in the slab can be prevented in the upper part of the void mold.

上記手段の実施形態として、スラブ内に配設され、その表面が平滑面で形成されるボイド型枠の表面に、気泡吸着用の凹部又は凸部を形成したのである。
このようにすれば、ボイド型枠に付着する空気、又は内在する空気がその凹部又は凸部に吸着するので離れないように保持される。このため、気泡がコンクリート表面に浮上することがない。また、その凹部又は凸部を植毛処理により形成すれば、気泡の前記吸着、保持効果がより高まる。 As an embodiment of the above means, a concave portion or a convex portion for adsorbing bubbles is formed on the surface of a void form frame which is disposed in a slab and has a smooth surface.
If it does in this way, since air adhering to a void formwork or internal air will adsorb | suck to the recessed part or convex part, it is hold | maintained so that it may not separate. For this reason, bubbles do not float on the concrete surface. Moreover, if the recessed part or convex part is formed by the flocking process, the said adsorption | suction and holding | maintenance effect of a bubble will increase more.

また、上記ボイド型枠が合成樹脂発泡成型品である場合には、その表面は、特になめらかな平滑面で形成されるので、通常は、その表面に気泡吸着効果はあまり期待できないが、上記気泡吸着用の凹部又は凸部を形成することにより、気泡の吸着、保持効果は非常に大きくなるといえる。   In addition, when the void form is a synthetic resin foam molded article, the surface is formed with a particularly smooth surface, and normally, the bubble adsorption effect cannot be expected on the surface. By forming the concave or convex portions for adsorption, it can be said that the effect of adsorbing and holding bubbles is greatly increased.

さらに、上記ボイド型枠は、スラブ内に格子状に配筋された上側主筋と下側主筋とで夾まれた空間に、そのスラブの面方向に沿って縦横所定の間隔で配設され、上記気泡吸着用の凹部又は凸部は、上記ボイド型枠の表面において前記面方向に沿って全周に亘って環状に形成されてその環状凹部又は環状凸部が複数段設けられれば、スラブの厚さ方向各位置に介在する気泡を効率的に吸着させ離れないよう保持できるようになる。   Further, the void formwork is disposed at predetermined intervals in the vertical and horizontal directions along the surface direction of the slab in a space between the upper main bar and the lower main bar arranged in a lattice pattern in the slab. If the concave portion or convex portion for adsorbing bubbles is formed in an annular shape over the entire circumference along the surface direction on the surface of the void mold frame, and the annular concave portion or convex portion is provided in a plurality of stages, the thickness of the slab Air bubbles intervening in each position in the vertical direction can be efficiently adsorbed and held away.

また、上記気泡吸着用の凹部又は凸部を、例えば、ボイド型枠の表面に設けたあご部により形成してもよい。あご部があれば、そのあご部が凸状の出っ張りとなり、その下部に凹状のへこみが生じ、その出っ張りとへこみとの間に、ボイド型枠をスラブ内に配設した状態で下向き面を形成する。したがって、その下向き面に気泡を吸着、保持させることができる。
さらに、その下向き面に、気泡吸着用の凹部又は凸部を形成すれば、その下向き面に吸着する空気がより浮き上がりにくくなる。この凹部又は凸部は、前述のように植毛処理により形成してもよい。 Moreover, you may form the said recessed part or convex part for bubble adsorption | suction by the jaw part provided in the surface of the void type | mold frame, for example. If there is a chin part, the chin part will be a convex bulge, a concave dent will occur at the bottom, and a downward facing surface will be formed with the void formwork placed in the slab between the bulge and the dent To do. Therefore, bubbles can be adsorbed and held on the downward surface.
Furthermore, if a concave portion or a convex portion for adsorbing bubbles is formed on the downward surface, the air adsorbed on the downward surface becomes more difficult to float. You may form this recessed part or convex part by the flocking process as mentioned above.

さらに、合成樹脂発泡成型により形成されたボイド型枠を用いる場合には、そのボイド型枠の表面に、通気性のない遮断層を設けてもよい。このようにすれば、ボイド型枠に内在する空気が遮断層の内側に維持されるので、気泡がコンクリート表面に浮上することがない。   Furthermore, in the case of using a void mold formed by synthetic resin foam molding, a non-breathable blocking layer may be provided on the surface of the void mold. In this way, the air present in the void form is maintained inside the barrier layer, so that bubbles do not float on the concrete surface.

また、上記ボイド型枠として、パイプ状又は柱状のボイド型枠を用いる場合には、そのボイド型枠の表面に、気泡吸着用の凹部又は凸部を形成してもよい。あるいは、そのパイプ状ボイド型枠の表面にあご部を設け、そのあご部が、前記ボイド型枠をスラブ内に配設した状態で前述の気泡吸着用の下向き面を形成するようにしてもよい。さらに、その下向き面に、前述のボイド型枠のごとく気泡吸着用の凹部又は凸部を形成してもよい。パイプ状ボイド型枠としては、例えば、中空のスパイラル管やロール管であってもよいし、柱状のボイド型枠としては、例えば、合成樹脂発泡成型により形成された円柱状あるいは角柱状、その他断面を有する柱状のものであってもよい。   Further, when a pipe-shaped or columnar void-shaped frame is used as the void-shaped frame, a bubble-adsorbing concave or convex portion may be formed on the surface of the void-shaped frame. Alternatively, a jaw portion may be provided on the surface of the pipe-shaped void mold, and the jaw may form the above-described downward surface for adsorbing bubbles in a state where the void mold is disposed in the slab. . Furthermore, a concave portion or a convex portion for adsorbing bubbles may be formed on the downward surface as in the above-described void form. The pipe-shaped void form may be, for example, a hollow spiral tube or a roll tube, and the columnar void form is, for example, a columnar or prismatic shape formed by synthetic resin foam molding, or other cross section. It may be a columnar shape having.

実施例１を図１及び図２に基づいて説明する。図１（ａ）は、スラブ内に格子状に配筋された上側主筋１と下側主筋２とで夾まれた空間に、そのスラブの面方向に沿って縦横所定の間隔で配設された本実施例のボイド型枠１０を示している。図示するように、上側主筋１と下側主筋２の各格子点３，３は、そのスラブ面に対して同一位置にあり、ボイド型枠１０は、その上側主筋１と下側主筋２によって基盤目状に仕切られた空間毎に一つづつ配置されている。   A first embodiment will be described with reference to FIGS. FIG. 1A shows a space between upper and lower main bars 1 and 2 arranged in a lattice pattern in a slab, arranged at predetermined intervals in the vertical and horizontal directions along the surface direction of the slab. The void formwork 10 of a present Example is shown. As shown in the figure, the lattice points 3 and 3 of the upper main bar 1 and the lower main bar 2 are at the same position with respect to the slab surface, and the void form frame 10 is formed by the upper main bar 1 and the lower main bar 2. One for each space partitioned in a grid.

このボイド型枠１０は、合成樹脂発泡成型により平面視円形、側面視楕円形に形成されたいわゆる扁平球形状を成しており、その表面は上記成型により平滑面を成している。その表面において、図１（ｂ）に示すように、横方向、すなわち図１（ａ）に示す配設状態において、そのスラブの面方向に沿って気泡吸着用の環状の凹部１１が形成されている。また、この環状の凹部１１がスラブの厚さ方向に沿って複数段設けられている。
打設したコンクリート７中の気泡４がボイド型枠１０の表面に吸着した場合には、この吸着気泡５が、図２に示すように、凹部１１に入り込んでその位置で保持される。このため、図中に矢印Ｃで示すように、その吸着気泡５がボイド型枠１０から離れてスラブＳ表面に浮上することはない。 The void mold 10 has a so-called flat sphere shape formed into a circular shape in a plan view and an elliptical shape in a side view by synthetic resin foam molding, and its surface forms a smooth surface by the above molding. On the surface, as shown in FIG. 1 (b), in the lateral direction, that is, in the arrangement state shown in FIG. 1 (a), an annular recess 11 for adsorbing bubbles is formed along the surface direction of the slab. Yes. The annular recess 11 is provided in a plurality of steps along the thickness direction of the slab.
When the air bubbles 4 in the placed concrete 7 are adsorbed on the surface of the void mold 10, the adsorbed air bubbles 5 enter the recess 11 and are held at that position, as shown in FIG. For this reason, as indicated by an arrow C in the figure, the adsorbed bubbles 5 do not separate from the void mold 10 and float on the surface of the slab S.

なお、この実施例１では、気泡吸着用の凹部１１をボイド型枠１０の周囲全周に形成して環状としたが、環状とせずとも断続的に設けてもよく、また、その形成する位置は、気泡の吸着効果の高い所望の位置に選択的に設ければよい。
また、凹部に代えて、凸部を形成してもよい。凸部を形成した場合には、吸着気泡５は、主にその凸部の下面で保持される。また、凹部と凸部とを併用してもよく、ボイド型枠１０の表面にエンボス加工、あるいは植毛処理等を施すことにより凹部及び凸部を形成してもよい。 In the first embodiment, the bubble adsorbing recess 11 is formed around the entire circumference of the void mold frame 10 to form an annular shape, but it may be provided intermittently without being annular, and the position where it is formed. May be selectively provided at a desired position having a high bubble adsorption effect.
Moreover, it may replace with a recessed part and may form a convex part. When the convex portion is formed, the adsorption bubbles 5 are mainly held on the lower surface of the convex portion. Moreover, you may use a recessed part and a convex part together, and you may form a recessed part and a convex part by giving embossing or a flocking process etc. to the surface of the void type | mold frame 10. FIG.

実施例２は、図３（ａ）（ｂ）に示すように、スラブ内への配設方法は実施例１と同様であり、そのボイド型枠１０の形状を立方体状に形成するとともに、その四方側面に環状の凹部１１及び環状の凸部１２をそれぞれ交互に複数段設けたものである。隣接する凹部１１と突部１２とは近接して、凹部１１と突部１２とが連続的に形成されているので、吸着気泡５の保持効果が高められているのが特徴である。なお、ボイド型枠１０の上部又は下部に、凹部１１、凸部１２を設けてもよい。   As shown in FIGS. 3 (a) and 3 (b), the second embodiment is the same as the first embodiment in the arrangement method in the slab, and the void mold 10 is formed in a cubic shape. A plurality of annular recesses 11 and annular projections 12 are alternately provided on the four side surfaces. Since the adjacent recesses 11 and the protrusions 12 are close to each other and the recesses 11 and the protrusions 12 are continuously formed, the retention effect of the adsorbed bubbles 5 is enhanced. In addition, you may provide the recessed part 11 and the convex part 12 in the upper part or the lower part of the void formwork 10. FIG.

実施例３は、図４（ａ）に示すように、合成樹脂発泡成型により扁平球形状に形成されたボイド型枠２０であり、その表面には、通気性のない遮断層２１が設けられている。遮断層２１の形成方法は、合成樹脂製等のフィルムで覆ってもよいし、通気性のない素材をコーティング等することにより形成してもよい。ここでいう通気性のない状態とは、ボイド型枠２０内に介在する空気、気泡を通過させない程度のことをいう。なお、スラブ内への配設方法は実施例１と同様である。   As shown in FIG. 4A, Example 3 is a void mold frame 20 formed into a flat spherical shape by synthetic resin foam molding, and a non-breathable blocking layer 21 is provided on the surface thereof. Yes. The blocking layer 21 may be formed by covering with a film made of synthetic resin or by coating a non-breathable material. Here, the state of no air permeability refers to a level in which air and bubbles intervening in the void mold 20 are not allowed to pass. The arrangement method in the slab is the same as that in the first embodiment.

実施例４は、図４（ｂ）に示すように、中空パイプ状ボイド型枠３０（１０）の表面に、気泡吸着用の凹部３１（１１） 及び凸部３２（１２）を交互に複数条形成したものである。ボイド型枠３０は、スパイラル状のリブ３３を有しているので、凹部３１及び凸部３２は、図示するように、管軸方向に沿って、その隣接するリブ３３，３３間を結ぶ方向に形成する。このように、凹部３１及び凸部３２を交互に複数条形成すれば、スラブの厚さ方向いずれの位置においても、気泡を吸着させ保持できるようになる。   In Example 4, as shown in FIG. 4 (b), a plurality of the recesses 31 (11) and the protrusions 32 (12) for adsorbing bubbles are alternately formed on the surface of the hollow pipe-shaped void form 30 (10). Formed. Since the void form frame 30 has spiral ribs 33, the recesses 31 and the protrusions 32 are formed in the direction connecting the adjacent ribs 33, 33 along the tube axis direction as shown in the figure. Form. In this way, if a plurality of recesses 31 and protrusions 32 are alternately formed, bubbles can be adsorbed and held at any position in the thickness direction of the slab.

実施例５は、上記実施例１乃至３と同様にスラブＳ内に配設され、その表面が平滑面で形成されるボイド型枠１０であり、図５に示すように、その表面にあご部１３を設け、そのあご部１３が、前記ボイド型枠１０をスラブＳ内に配設した状態で気泡吸着用の下向き面１４を形成するようにしたものである。   The fifth embodiment is a void mold 10 that is disposed in the slab S and has a smooth surface as in the first to third embodiments. As shown in FIG. 13 is provided, and the jaw portion 13 forms a downward surface 14 for adsorbing bubbles in a state where the void mold 10 is disposed in the slab S.

上記下向き面１４に吸着した気泡５は、その下向き面１４によって浮き上がらないように維持される。その下向き面１４の位置は、図６に示すように、ボイド型枠１０の平面視、最大径となる位置が望ましく、その最大径位置よりも下方に設けても良い。なお、そのあご部１３及び下向き面１４を複数段設けることも可能である。
また、その下向き面１４の向きは、水平下向き、あるいは、ボイド型枠１０の中心に近づくにつれてやや上方へ向かう傾斜面であることが望ましい。これは、仮に、下向き面１４の向きが逆向き、すなわち、下向き面１４が、ボイド型枠１０の中心から遠ざかるにつれてやや上方へ向かう傾斜面であって、その傾斜が急であると、吸着気泡５が、下向き面１４に沿って外側へ移動し、その結果、ボイド型枠１０から離れて浮き上がりやすくなるからである。 The bubbles 5 adsorbed on the downward surface 14 are maintained so as not to be lifted by the downward surface 14. As shown in FIG. 6, the position of the downward surface 14 is preferably a position having a maximum diameter in plan view of the void mold 10, and may be provided below the maximum diameter position. It is also possible to provide a plurality of chin portions 13 and downward surfaces 14.
In addition, it is desirable that the direction of the downward surface 14 is a horizontal downward direction or an inclined surface that is slightly upward as it approaches the center of the void mold 10. This is because if the direction of the downward surface 14 is reversed, that is, the downward surface 14 is an inclined surface that is slightly upward as it goes away from the center of the void mold 10, and if the inclination is steep, the adsorbed bubbles This is because 5 moves outward along the downward surface 14, and as a result, it tends to float away from the void mold 10.

なお、その下向き面１４は、前記最大径位置よりも上方に設けてもよいが、ボイド型枠１０の表面の気泡５がその下向き面１４に当たって吸着する前に、ボイド型枠１０の表面から離れて浮き上がってしまわないようにすることが望ましい。   The downward surface 14 may be provided above the position of the maximum diameter, but before the bubble 5 on the surface of the void mold 10 hits the downward surface 14 and is adsorbed, it is separated from the surface of the void mold 10. It is desirable not to lift it up.

実施例６は、図７に示すように、実施例５のボイド型枠１０の上記下向き面１４に、気泡吸着用の凹部１５を形成したものである。吸着気泡５は、その凹部１５に入り込んで止まるので、気泡５の浮き上がりをより確実に防止し得る。なお、凹部１５に代えて凸部を形成してもよい。
また、図８及び図９に示すように、ボイド型枠１０をパイプ状ボイド型枠３０又は円柱状ボイド型枠３０として、上記あご部１３の下向き面１４、あるいは、その下向き面１４に上記凹部１５又は凸部を形成してもよい。この種のボイド型枠３０に、前記あご部１３の下向き面１４、あるいは、その下向き面１４に凹部１５又は凸部を形成する場合には、それぞれを、そのボイド型枠３０の軸方向全長に亘って設けるのが好ましい。ボイド型枠３０としては、図８に示すように、中空のロール管や、あるいはスパイラル管等であってもよいし、図９に示す発泡樹脂成形によるものであってもよい。 In the sixth embodiment, as shown in FIG. 7, a bubble adsorbing recess 15 is formed on the downward surface 14 of the void mold 10 of the fifth embodiment. Since the adsorbed bubbles 5 enter the concave portion 15 and stop, the bubbles 5 can be more reliably prevented from rising. In addition, it may replace with the recessed part 15 and may form a convex part.
Further, as shown in FIGS. 8 and 9, the void mold 10 is formed as a pipe-shaped void mold 30 or a columnar void mold 30, so that the jaw portion 13 has the downward surface 14 or the concave portion on the downward surface 14. 15 or convex portions may be formed. When this kind of void mold 30 is formed with the downward surface 14 of the jaw portion 13 or the concave portion 15 or the convex portion on the downward surface 14, each of the void mold frame 30 has an axial total length of the void mold frame 30. It is preferable to provide it over. As shown in FIG. 8, the void mold 30 may be a hollow roll tube, a spiral tube, or the like, or may be formed by foamed resin molding shown in FIG.

（ａ）は実施例１のボイド型枠の配設状態を示す斜視図、（ｂ）はボイド型枠の斜視図(A) is a perspective view which shows the arrangement | positioning state of the void formwork of Example 1, (b) is a perspective view of a void formwork. 気泡の吸着状態を示す説明図Explanatory drawing showing the adsorption state of bubbles （ａ）は実施例２のボイド型枠の配設状態を示す斜視図、（ｂ）はボイド型枠の斜視図(A) is a perspective view which shows the arrangement | positioning state of the void formwork of Example 2, (b) is a perspective view of a void formwork. （ａ）は実施例３のボイド型枠の断面図、（ｂ）は実施例４のボイド型枠を示す斜視図(A) is sectional drawing of the void formwork of Example 3, (b) is a perspective view which shows the void formwork of Example 4. 実施例５のボイド型枠の斜視図The perspective view of the void formwork of Example 5 図５のボイド型枠への気泡の吸着状態を示す説明図Explanatory drawing which shows the adsorption | suction state of the bubble to the void formwork of FIG. 実施例６のボイド型枠への気泡の吸着状態を示す説明図Explanatory drawing which shows the adsorption | suction state of the bubble to the void formwork of Example 6 パイプ状ボイド型枠を用いた実施例を示す説明図Explanatory drawing which shows the Example using a pipe-shaped void formwork 柱状ボイド型枠を用いた実施例を示す説明図Explanatory drawing which shows the Example using columnar void formwork 従来例のボイド型枠を使用した際の気泡の移動経路を示す説明図Explanatory drawing which shows the movement path | route of a bubble at the time of using the void formwork of a prior art example 従来例のボイド型枠を使用した際の気泡の移動経路を示す説明図Explanatory drawing which shows the movement path | route of a bubble at the time of using the void formwork of a prior art example

符号の説明Explanation of symbols

１ 上側主筋
２ 下側主筋
３ 格子点
４ 気泡
５ 吸着気泡
６ 穴
７ コンクリート
１０，２０，３０ ボイド型枠
１１，３１ 凹部
１２，３２ 凸部
１３ あご部
１４ 下向き面
２１ 遮断層
３３ リブ
Ｓ スラブ DESCRIPTION OF SYMBOLS 1 Upper main reinforcement 2 Lower main reinforcement 3 Lattice point 4 Bubble 5 Adsorption bubble 6 Hole 7 Concrete 10, 20, 30 Void formwork 11, 31 Concavity 12, 32 Convex part 13 Jaw part 14 Down surface 21 Barrier layer 33 Rib S Slab

Claims (5)

スラブＳ内に配設され、その表面が平滑面で形成されるボイド型枠１０の表面に、気泡吸着用の凹部１１又は凸部１２を形成したことを特徴とするボイド型枠。   A void mold frame, wherein a void adsorbing concave portion 11 or a convex portion 12 is formed on a surface of a void mold frame 10 disposed in a slab S and having a smooth surface. 上記気泡吸着用の凹部１１又は凸部１２は、ボイド型枠１０の表面に植毛処理を施すことにより形成されることを特徴とする請求項１に記載のボイド型枠。   2. The void form according to claim 1, wherein the bubble-adsorbing concave part 11 or the convex part 12 is formed by performing a flocking process on the surface of the void form 10. 上記ボイド型枠１０は、合成樹脂発泡成型品であることを特徴とする請求項１又は２に記載のボイド型枠。   The void mold frame according to claim 1 or 2, wherein the void mold frame (10) is a synthetic resin foam molded product. 上記ボイド型枠１０は、スラブＳ内に格子状に配筋された上側主筋１と下側主筋２とで夾まれた空間に、そのスラブＳの面方向に沿って縦横所定の間隔で配設され、上記気泡吸着用の凹部１１又は凸部１２は、上記ボイド型枠１０の表面において前記面方向に沿って全周に亘って環状に形成されてその環状凹部１１又は環状凸部１２が複数段設けられることを特徴とする請求項１乃至３のいずれかに記載のボイド型枠。   The void form 10 is arranged at predetermined intervals in the vertical and horizontal directions along the surface direction of the slab S in a space between the upper main bar 1 and the lower main bar 2 arranged in a lattice in the slab S. The bubble-adsorbing recess 11 or protrusion 12 is formed in an annular shape over the entire circumference along the surface direction on the surface of the void mold 10, and a plurality of the annular recess 11 or the annular protrusion 12 is provided. The void formwork according to any one of claims 1 to 3, wherein the void form is provided in steps. ボイド型枠１０は、スラブＳ内に配設されるパイプ状又は柱状のボイド型枠３０であることを特徴とする請求項１乃至３のいずれかに記載のボイド型枠。   The void formwork according to any one of claims 1 to 3, wherein the void formwork (10) is a pipe-like or columnar void formwork (30) disposed in the slab (S).
JP2005355096A 2005-05-30 2005-12-08 Void formwork Expired - Fee Related JP4318688B2 (en)

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