JPH01169309U - - Google Patents

Info

Publication number
JPH01169309U
JPH01169309U JP6510688U JP6510688U JPH01169309U JP H01169309 U JPH01169309 U JP H01169309U JP 6510688 U JP6510688 U JP 6510688U JP 6510688 U JP6510688 U JP 6510688U JP H01169309 U JPH01169309 U JP H01169309U
Authority
JP
Japan
Prior art keywords
core material
corrugated paper
core
core materials
cylindrical
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.)
Granted
Application number
JP6510688U
Other languages
English (en)
Other versions
JPH0353851Y2 (ja
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 filed Critical
Priority to JP6510688U priority Critical patent/JPH0353851Y2/ja
Publication of JPH01169309U publication Critical patent/JPH01169309U/ja
Application granted granted Critical
Publication of JPH0353851Y2 publication Critical patent/JPH0353851Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Moulds, Cores, Or Mandrels (AREA)

Description

【図面の簡単な説明】
第１図は本考案の実施例の構造を示す一部切欠
斜視図、第２図〜第７図はその製作工程を示す説
明図である。 １……内型枠、２，３，４……芯材、５……外
被、６……端板、７……リブ。

Claims (1)

  1. 【実用新案登録請求の範囲】 ダンボール紙をその長手方向に平行な折目で折
    り曲げ形成した筒状の芯材と、該芯材の１本また
    は複数本の束の外面を被覆するダンボール紙外被
    とから成り、 前記各芯材は、芯材自身のダンボール紙の面内
    の一部を芯材横断面内面と同形に切り起して形成
    したリブを内蔵した筒状体であることを特徴とす
    るコンクリート中空部材の空洞部形成用内型枠。
JP6510688U 1988-05-19 1988-05-19 Expired JPH0353851Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6510688U JPH0353851Y2 (ja) 1988-05-19 1988-05-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6510688U JPH0353851Y2 (ja) 1988-05-19 1988-05-19

Publications (2)

Publication Number Publication Date
JPH01169309U true JPH01169309U (ja) 1989-11-29
JPH0353851Y2 JPH0353851Y2 (ja) 1991-11-26

Family

ID=31290552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6510688U Expired JPH0353851Y2 (ja) 1988-05-19 1988-05-19

Country Status (1)

Country Link
JP (1) JPH0353851Y2 (ja)

Also Published As

Publication number Publication date
JPH0353851Y2 (ja) 1991-11-26

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