鉄格子






ドイツの警察署にある鉄格子



Defense.gov News Photo 110503-N-RG360-070 - U.S. Navy Petty Officer 2nd Class Jason Barcellos paints part of the Muang Phuket School in Chalong Thailand during a community service project.jpg


鉄格子（てつごうし）は、鉄でできた格子状の構造物。



用途



  • 逃走防止

    刑務所や閉鎖病棟など、身柄を拘束する建物で窓に設置されるほか、扉としても使用する。このことから刑務所を表す隠語にもなっている。


  • 侵入防止

    銀行の裏通りに面した窓など、外部からの侵入を阻止したい箇所に設置される。ほかに、老朽化したトンネルや洞窟など立ち入りが危険な箇所や、貴重な植物が自生している場所などにも設置される場合がある。


  • 転落防止

    吹抜けや階段などで転落防止用の柵として使用される。


  • 保護

    体育館の窓や誘導灯、貨物自動車や荷物車の窓、ドアなどにおいて、物がぶつかって壊れることを防ぐために鉄格子で覆って保護することがある。









Popular posts from this blog

MongoDB - Not Authorized To Execute Command

Image
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 0 I have successfully enabled authorization on MongoDB and I have created an account on the admin database and then I created an account for my database called test. The following connection string to connect to my test database works successfully: mongo --host 192.168.17.52 --port 27017 -u user1 -p password --authenticationDatabase test Only problem I have now is, I cannot execute commands such as: show dbs. I get the following error when I try to do so: "errmsg" : "not authorized on admin to execute command { listDatabases: 1.0, lsid: { id: UUID("a1d5bc0d-bc58-485e-b232-270758a89455") }, $db: "admin...
Read more

How to fix TextFormField cause rebuild widget in Flutter

Image
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 0 I've got the same issue at #9280. I tried all solutions from that topic with/without GlobalKey for Scaffold and Form but the problem wasn't fixed. I tried to build a authentication form with login and signup. But the keyboard doesn't show when I tap the TextFormField at the first time. Then I try to input some letter from physical keyboard, the widget is rebuilt. Like this: login screen Nothing to be log when I run flutter run --verbose, so I logged manually. Every tapping on field, the widget called dispose -> init -> build. [√] Flutter (Channel beta, v1.0.0, on Microsoft Windows [Version 10.0.17763.195], ...
Read more

Npm cannot find a required file even through it is in the searched directory

Image
up vote 0 down vote favorite I got that error: users-Air:pdfuploader user$ npm run start client@0.1.0 start /Users/user/Documents/pdfuploader react-scripts start Could not find a required file. Name: index.html Searched in: /Users/user/Documents/pdfuploader/public npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! client@0.1.0 start: `react-scripts start` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the client@0.1.0 start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. npm ERR! A complete log of this run can be found in: npm ERR! /Users/user/.npm/_logs/2018-11-19T10_19_14_555Z-debug.log users-Air:pdfuploader user$ And the file is in /Users/user/Documents/pdfuploader/public as you can see in my github repository: https://github.c...
Read more