JPH05305607A - Core mold of concrete shuttering for molding of block - Google Patents

Core mold of concrete shuttering for molding of block

Info

Publication number
JPH05305607A
JPH05305607A JP13583592A JP13583592A JPH05305607A JP H05305607 A JPH05305607 A JP H05305607A JP 13583592 A JP13583592 A JP 13583592A JP 13583592 A JP13583592 A JP 13583592A JP H05305607 A JPH05305607 A JP H05305607A
Authority
JP
Japan
Prior art keywords
core mold
mold
flexible sheet
core
air bag
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP13583592A
Other languages
Japanese (ja)
Inventor
Tsugio Tsuji
二夫 辻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enika Kogyo Kk
Original Assignee
Enika Kogyo Kk
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 Enika Kogyo Kk filed Critical Enika Kogyo Kk
Priority to JP13583592A priority Critical patent/JPH05305607A/en
Publication of JPH05305607A publication Critical patent/JPH05305607A/en
Pending legal-status Critical Current

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  • Moulds, Cores, Or Mandrels (AREA)

Abstract

PURPOSE:To provide a core mold having fresh structure wherein though this is related to a cylindrical core mold forming a hollow part of a concrete block and since the core mold having conventional structure is provided with a built-in drawing mechanism, a matter having a small diameter can't be made and a matter whose section is small and mold assembling and demolding operations are easy can be made easily. CONSTITUTION:The title core mold is provided with a flexible sheet 7 beaming the outside of the core mold, a large number of penetrating materials 5...which are arranged on the inside of the flexible sheet and provided with rigidity of an axial direction, an air bag 1 coming into contact with the penetrating materials 5...on the inside and a tension material 6 regulating an arranging form of the penetrating materials 5...when the air bag 1 is expanded. The tension material 6 is formed of a large number of radial cable or one sheet. When pressurized air is blown into the air bag 1, the flexible sheet 7 is spread out by the air bag 1 through the penetrating materials 5.... A sectional form of the core mold 2 after expansion is regulated by the tension material 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、暗渠ブロック、ボッ
クスカルバート、U字溝などのコンクリートブロックの
中空部を形成するための筒状の中子型に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical core mold for forming hollow portions of concrete blocks such as underdrain blocks, box culverts and U-shaped grooves.

【0002】[0002]

【従来の技術】成形されたコンクリートブロックの側方
に向けて中子型を脱型することができない形状の中空部
をコンクリートブロックに成形するために、従来は絞り
構造を備えた中子型が用いられている。この種の従来の
中子型10は、図4に示すように、シェルの一部11を
引き込んだ後、トグル機構やパンタグラフ機構などの型
開閉機構でシェル12を絞って縮径し、コンクリートブ
ロックから離隔して、軸方向に引き出すことによって脱
型される。
2. Description of the Related Art In order to form a hollow part in a concrete block in which a core mold cannot be demolded toward the side of a molded concrete block, a core mold having a drawing structure is conventionally used. It is used. As shown in FIG. 4, a conventional core mold 10 of this type draws in a part 11 of the shell and then squeezes the shell 12 with a mold opening / closing mechanism such as a toggle mechanism or a pantograph mechanism to reduce the diameter of the concrete block. It is removed from the mold by pulling it axially.

【0003】[0003]

【発明が解決しようとする課題】このような従来の中子
型10は、シェル12を内側に絞るための型開閉機構を
中子型に内蔵しなければならず、特に型枠の製作にあた
って型開閉機構を中子型のシェル12の内側に溶接等に
よって固定しなければならないため、直径の小さなもの
を製作することは不可能であった。そのため直径の小さ
な中空部をコンクリートブロック内に成形しようとする
ときには、抜き勾配を設けた錐形の中子型を用いること
となるが、抜き勾配のために中空部の断面積が変化する
こと及び脱型時に型枠の開閉ストロークが大きくなると
いう欠点がある。
In the conventional core mold 10 as described above, a mold opening / closing mechanism for squeezing the shell 12 inward must be built in the core mold. Since the opening / closing mechanism must be fixed to the inside of the core-type shell 12 by welding or the like, it is impossible to manufacture a small-diameter one. Therefore, when forming a hollow part with a small diameter in a concrete block, a cone-shaped core type with a draft is used, but the cross-sectional area of the hollow part changes due to the draft and There is a drawback that the opening and closing strokes of the mold become large when demolding.

【0004】この発明は型組み及び脱型作業が容易で、
断面積が小さくかつ種々の断面形状のものを容易に製作
することができる、新規な構造の中子型を提供しようと
するものである。
The present invention facilitates mold assembling and demolding work,
An object of the present invention is to provide a core mold having a new structure, which has a small cross-sectional area and can be easily manufactured with various cross-sectional shapes.

【0005】[0005]

【課題を解決するための手段】本発明の中子型2は、コ
ンクリートブロックの中空部を成形する筒状の中子型に
おいて、中子型の外表面となる可撓性シート7と、この
可撓性シートの内側に配置された上記筒の軸方向の剛性
を備えた多数の通し材5・・・と、これらの通し材5・
・・に内側より接するエアバッグ1と、エアバッグ1が
膨張したときの通し材5・・・の配設形状を規定するテ
ンション材6とを備えたものである。
The core mold 2 of the present invention is a cylindrical core mold for molding a hollow portion of a concrete block, and a flexible sheet 7 which is an outer surface of the core mold, A large number of through members 5 provided with the rigidity in the axial direction of the cylinder arranged inside the flexible sheet, and these through members 5.
.. is provided with an airbag 1 that comes into contact with the inside from the inside, and a tension member 6 that defines the arrangement shape of the through members 5 ... When the airbag 1 is inflated.

【0006】可撓性シート7は、たとえば耐油性、耐摩
耗性および耐熱性を備えたシリコンゴムシートなどで製
作することができ、通し材5はたとえば引き抜き棒鋼な
どを用いることができる。またエアバッグ1は型枠内に
注入された生コンクリートの内圧に抗する大きさの空気
圧に充分に耐える外皮を備えたものとし、テンション材
6はエアバッグ1を膨張させたときに、このエアバッグ
1の外形を規定するか、あるいは前述した通し材5・・
・の配置形状を規定するように設けられる。このテンシ
ョン材6は図1に示すように、中子型の直径方向に配置
した多数の索条6によって形成することもできるし、ま
た1枚の伸縮性のないシートによって形成することもで
きる。いずれにしてもこのテンション材6の両端ないし
外周には、外周部におけるエアバッグの外皮あるいは通
し材5が連着される。
The flexible sheet 7 can be made of, for example, a silicon rubber sheet having oil resistance, abrasion resistance and heat resistance, and the threading member 5 can be made of drawn steel bar. Further, the airbag 1 is provided with an outer skin that sufficiently withstands an air pressure of a magnitude that resists the internal pressure of the green concrete injected into the mold, and the tension material 6 is used to inflate the airbag 1 when the airbag 1 is inflated. The outer shape of the bag 1 is specified or the above-mentioned threading member 5 ...
・ It is provided so as to specify the arrangement shape. As shown in FIG. 1, the tension member 6 can be formed by a large number of core-shaped diametrically arranged cords 6 or can be formed by a single non-stretchable sheet. In any case, the outer skin of the airbag or the through member 5 at the outer peripheral portion is continuously attached to both ends or the outer periphery of the tension member 6.

【0007】[0007]

【作用】以上のように構成した中子型2の両端を、型枠
の小口板3に設けた中子支持孔4に挿通して、エアバッ
グ1に加圧空気を吹き込むと、エアバッグ1は膨張し、
通し材5を介して可撓性シート7を押し拡げる。エアバ
ッグ1が膨張した後の中子型2の断面形状は、テンショ
ン材6によって規定される。従ってテンション材6の長
さ(シート状のテンション材を用いたときはその外形)
によりエアバッグ1が膨張したときの中子型2の断面形
状を図3(a)ないし(c)に示すような任意の形状に
規定することができ、可撓性シート7がこの規定形状に
まで膨らんだときに、中子型2の両端が小口板の中子支
持孔4の内側に密着して、中子型2が両端で支持される
ようにする。
When both ends of the core mold 2 constructed as described above are inserted into the core support holes 4 provided in the small plate 3 of the mold and pressurized air is blown into the airbag 1, the airbag 1 Expands,
The flexible sheet 7 is pushed and spread via the threading member 5. The cross-sectional shape of the core mold 2 after the airbag 1 is inflated is defined by the tension material 6. Therefore, the length of the tension material 6 (its outer shape when a sheet-shaped tension material is used)
Thus, the cross-sectional shape of the core mold 2 when the airbag 1 is inflated can be regulated to any shape as shown in FIGS. 3 (a) to 3 (c), and the flexible sheet 7 can be regulated to this regulated shape. When the core mold 2 is inflated, the both ends of the core mold 2 come into close contact with the inside of the core support hole 4 of the small plate so that the core mold 2 is supported at both ends.

【0008】エアバッグ1は中子型2の軸方向に所定間
隔を隔てて複数個設けてやればよく、隣接するエアバッ
グ相互の間のコンクリートの内圧は、通し材5の剛性に
よって受け持たれる。
A plurality of airbags 1 may be provided at predetermined intervals in the axial direction of the core mold 2, and the internal pressure of concrete between adjacent airbags is taken up by the rigidity of the threading member 5. ..

【0009】このようにして中子型2を小口板3、3間
に装架して、型枠内に生コンクリートを打ち込み、コン
クリートが凝固した後、ブロックを脱型するときは、中
子型2のエアバッグ1から空気を抜いてやれば、エアバ
ッグ1は収縮し、これに伴って通し材5および可撓性シ
ート7が収縮してコンクリートブロックの表面から離脱
するから、それらを軸方向に引き出して脱型してやれば
よい。
In this way, the core mold 2 is mounted between the edge plates 3 and 3, and when the concrete is solidified and the concrete is solidified and the block is removed from the mold, the core mold is When the air is removed from the airbag 2 of No. 2, the airbag 1 contracts, and the threading member 5 and the flexible sheet 7 contract accordingly and separate from the surface of the concrete block. You can pull it out to remove the mold.

【0010】[0010]

【実施例】図1及び図2はこの発明の一実施例を示した
ものである。エアバッグ1は矩形の環(リング)状で、
中子型2の軸方向に4個配置されている。両端のエアバ
ッグ1、1は、型組みしたときに小口板2の中子支持孔
4の内側となる位置に配置されている。通し材5は比較
的密な間隔で、しかし相互に密着させることなく、エア
バッグ1の外周に固着されている。図の実施例のもので
は、対向する通し材相互を両端に結束した多数のテンシ
ョンワイヤ6を設けることにより連結し、エアバッグ1
に加圧空気を送り込んだときのエアバッグ1の外形形状
をテンションワイヤ6・・・の張力によって規定してい
る。前述したように、テンションワイヤ6・・・の代わ
りに、膨張したときのエアバッグ1に要求される外形形
状と同形状の形状に裁断した非伸縮性のシートの周囲に
通し材5・・・を結束した構造とすることも可能であ
る。
1 and 2 show an embodiment of the present invention. The airbag 1 has a rectangular ring shape,
Four core molds 2 are arranged in the axial direction. The airbags 1 and 1 at both ends are arranged at positions inside the core support hole 4 of the fore-edge plate 2 when assembled into a mold. The threading members 5 are fixed to the outer periphery of the airbag 1 at relatively close intervals, but without being in close contact with each other. In the embodiment shown in the drawing, the through members facing each other are connected to each other by providing a number of tension wires 6 bound at both ends, and the airbag 1
The outer shape of the airbag 1 when the pressurized air is sent to is defined by the tension of the tension wires 6 ... As described above, in place of the tension wires 6 ..., the threading member 5 is cut around the non-stretchable sheet cut into the same shape as the outer shape required for the airbag 1 when inflated. It is also possible to have a structure in which

【0011】可撓性シート7は、エアバッグ1が膨張し
て通し材5が所定形状に配置されたときに、その外側に
ぴんと張った状態で外接されるように、通し材5・・・
を囲むように設けられる。この可撓性シート7は通し材
5・・・に接着してもしなくてもよいが、少なくとも一
部を通し材5に接着しておくことにより、中子型2の型
組みおよび脱型作業はより容易になる。
The flexible sheet 7 is provided with a threading member 5 so that the flexible sheet 7 is circumscribed outside in a taut state when the air bag 1 is inflated and the threading member 5 is arranged in a predetermined shape.
It is provided to surround. The flexible sheet 7 may or may not be adhered to the threading member 5 ... However, by bonding at least a part of the flexible sheet 7 to the threading member 5, the mold assembly and demolding work of the core mold 2 are performed. Will be easier.

【0012】このような構造の中子型2は、図2に示す
ように、従来の中子型と同様に小口板3に設けた中子支
持孔4に両端を挿通し、エアバッグ1に空気を吹き込ん
で、中子型2を拡げることによって両端外周を中子支持
孔4の内周面に密着させた状態で型枠内に固定される。
従ってこの型組み状態を保つためには、エアバッグ1内
に充填された空気の圧力を保持する手段が必要であり、
エアバッグに空気を吹き込んだ後、その空気供給孔をバ
ルブ等によって閉鎖することにより、内圧が保持される
ようにする。エアバッグ1に密封した空気の漏れが懸念
される場合には、エアバッグ1に余裕を見込んだ高い圧
力の空気を封入するか、あるいはその空気供給配管にア
キュムレータを設けてやればよい。
As shown in FIG. 2, the core mold 2 having such a structure is inserted into both ends of the core support hole 4 provided in the fore-edge plate 3 as shown in FIG. The core mold 2 is expanded by blowing air into the mold, with the outer circumferences of both ends being in close contact with the inner peripheral surface of the core support hole 4.
Therefore, in order to maintain this mold assembly state, it is necessary to have a means for holding the pressure of the air filled in the airbag 1.
After the air is blown into the airbag, the internal pressure is maintained by closing the air supply hole with a valve or the like. If there is a concern about leakage of air sealed in the airbag 1, it is sufficient to fill the airbag 1 with high pressure air with a margin, or to provide an accumulator in the air supply pipe.

【0013】このようにして中子型2が型枠にセットさ
れたら、型枠に生コンクリートを供給して養生室に入れ
てコンクリートを固化させる。可撓性シート7にはコン
クリートの付着を防止するために、油性の離型剤が塗布
されることがあり、また生コンクリートの流入や脱型時
にコンクリートと繰り返し摺擦されるから、耐油性及び
耐摩耗性を備えたものとし、さらに可撓性シート7及び
エアバッグ1の外皮の材質は、養生室の温度に耐えるだ
けの耐熱性を備えたもので製作することが必要である。
After the core mold 2 is set in the mold in this way, ready-mixed concrete is supplied to the mold and placed in a curing chamber to solidify the concrete. An oil-based mold release agent may be applied to the flexible sheet 7 in order to prevent the adhesion of concrete, and since it is repeatedly rubbed against the concrete when the fresh concrete flows in or out of the mold, oil resistance and The flexible sheet 7 and the outer cover of the airbag 1 must be made of materials having heat resistance sufficient to withstand the temperature of the curing chamber.

【0014】型枠内に注入した生コンクリートが、脱型
が可能になるまで固化したら、エアバッグ1への空気供
給口を開放して、エアバッグ1内を大気圧にする。これ
によりエアバッグ1はその外皮の弾力あるいは通し材5
・・・を包囲する可撓性シート7の弾力により縮小し、
成形されたブロックの内壁面から離隔する。そこで通し
材5・・・の剛性を利用して、中子型2全体をすだれを
折り畳むように折り畳んで、軸方向に引き抜いて脱型す
る。
When the ready-mixed concrete poured into the mold is solidified until the mold can be removed, the air supply port to the airbag 1 is opened to bring the inside of the airbag 1 to atmospheric pressure. As a result, the elasticity of the outer skin of the airbag 1 or the thread 5
Is reduced by the elasticity of the flexible sheet 7 surrounding the ...
Separate from the inner wall surface of the molded block. Therefore, the rigidity of the threading members 5 is utilized to fold the entire core mold 2 in such a manner that the combs are folded, and then the core mold 2 is pulled out in the axial direction to remove the mold.

【0015】[0015]

【発明の効果】以上説明したこの発明の中子型は、断面
積が小さくかつ軸方向長さの長い中子型を容易に製作す
ることができ、かつその型組み及び脱型操作も容易であ
るという特徴がある。また従来多く用いられている卵
形、八角形及び円形の断面積のもののほか、複雑な断面
形状のものであっても製作が容易であり、かつ断面形状
が複雑なものであっても、その外周面全体がコンクリー
トブロックの内壁面から離隔するように自由な形状で中
子型を絞ることが可能であるという効果がある。
According to the core die of the present invention described above, a core die having a small cross-sectional area and a long axial length can be easily manufactured, and the die assembling and demolding operations are also easy. There is a feature that there is. In addition to the egg-shaped, octagonal, and circular cross-sectional areas that are often used in the past, even if the cross-sectional shape is complicated, it is easy to manufacture, and even if the cross-sectional shape is complicated, There is an effect that the core mold can be squeezed in a free shape so that the entire outer peripheral surface is separated from the inner wall surface of the concrete block.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例を示す中子型の断面図FIG. 1 is a sectional view of a core mold showing an embodiment of the present invention.

【図2】この発明の中子型の型組み状態を示す模式的な
断面図
FIG. 2 is a schematic cross-sectional view showing a core mold assembly state of the present invention.

【図3】ブロックの中空孔の断面形状を例示した図FIG. 3 is a view exemplifying a cross-sectional shape of a hollow hole of a block.

【図4】従来構造の中子型の型組み状態を示す説明図FIG. 4 is an explanatory view showing a core-shaped mold assembly state of a conventional structure.

【図5】従来構造の中子型の絞り状態を示す説明図FIG. 5 is an explanatory view showing a core type aperture state of a conventional structure.

【符号の説明】[Explanation of symbols]

1 エアバッグ 2 中子型 5 通し材 6 テンションワイヤ 7 可撓性シート 1 Airbag 2 Core type 5 Threading material 6 Tension wire 7 Flexible sheet

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 コンクリートブロックの中空部を成形す
る筒状の中子型において、中子型の外表面となる可撓性
シート(7) と、この可撓性シートの内側に配置された上
記筒の軸方向の剛性を備えた多数の通し材(5) ・・・
と、これらの通し材(5) ・・・に内側より接するエアバ
ッグ(1) と、エアバッグ(1) が膨張したときの通し材
(5) ・・・の配設形状を規定するテンション材(6) とを
備えた、コンクリートブロック成形用型枠の中子型。
1. A tubular core mold for molding a hollow part of a concrete block, wherein a flexible sheet (7) serving as an outer surface of the core mold and the above-mentioned flexible sheet (7) arranged inside the flexible sheet are provided. A large number of threading members (5) with rigidity in the axial direction of the cylinder
And an air bag (1) that comes into contact with these threading members (5) from the inside, and a threading member when the air bag (1) is inflated
(5) A core mold for a concrete block molding form, comprising a tension material (6) that defines the arrangement shape of.
JP13583592A 1992-04-28 1992-04-28 Core mold of concrete shuttering for molding of block Pending JPH05305607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13583592A JPH05305607A (en) 1992-04-28 1992-04-28 Core mold of concrete shuttering for molding of block

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13583592A JPH05305607A (en) 1992-04-28 1992-04-28 Core mold of concrete shuttering for molding of block

Publications (1)

Publication Number Publication Date
JPH05305607A true JPH05305607A (en) 1993-11-19

Family

ID=15160886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13583592A Pending JPH05305607A (en) 1992-04-28 1992-04-28 Core mold of concrete shuttering for molding of block

Country Status (1)

Country Link
JP (1) JPH05305607A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104175389A (en) * 2014-07-29 2014-12-03 浙江立鑫高温耐火材料有限公司 Manufacturing process for die-casting saggars with refractory materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104175389A (en) * 2014-07-29 2014-12-03 浙江立鑫高温耐火材料有限公司 Manufacturing process for die-casting saggars with refractory materials

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