[Itoki Co., Ltd.] Itoki develops a special door for underground shelters weighing approximately 1,400 kg that can be opened and closed manually, assuming disaster prevention and defense, and installed it in the Japan Nuclear Shelter Association model room
Itoki Co., Ltd. Press release: September 30, 2024 Itoki develops a special door for underground shelters weighing approximately 1,400 kg that can be manually opened and closed for disaster prevention and defense purposes, and installed it in the Japan Nuclear Shelter Association model room. All parts procurement and assembly are completed in Japan, achieving impact resistance, airtightness, watertightness, and radiation shielding performance that leads the world standards ITOKI Co., Ltd. (Headquarters: Chuo-ku, Tokyo, President: Hiroshi Minato) has developed a special door called “BOUNCEBACK” for civil defense underground shelters, and has developed a special door called “BOUNCEBACK” for underground civil defense shelters. It was installed in the model room of City)*1. Image
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performance and specifications required for underground shelters in preparation for emergencies in Japan, a disaster-prone country. ” (hereinafter referred to as “Working Group”) *2 as the only special door manufacturer selected as a corporate committee member. In addition to participating in the drafting of the ideal performance and specifications for shelters in Japan, we have obtained Resilience Certification*3, which is the only certification body provided by the Resilience Japan Promotion Council. We will continue to develop special doors for underground shelters based on the technology and quality that we have cultivated through our track record of delivering products to advanced medical and research facilities in Japan, and through active participation in working groups. We will continue to contribute to the realization of people’s safe, secure, and richer lives. ■Main features of the product ・Made in Japan, leading the world in shock resistance, airtightness, watertightness, and radiation shielding performance BOUNCEBACK is a completely made-in-Japan product, with planning, design, parts procurement, and assembly all completed in Japan. “The explosion-proof structure based on simulation-FEM analysis has achieved impact resistance of 400kN/m2, and by adopting a 2-way hinge, airtightness of 2m3/m2/h (differential pressure: 10kPa) and 0.03 m/m2・H (water head: 10M) watertightness, maze-shaped handle shaft eliminates shielding defects, and achieves radiation shielding performance equivalent to 200mm of ordinary concrete. ・Opening/closing and tightening system that can be used by women and children despite its weight of approximately 1400 kg The door weighs approximately 1,400 kg, and thanks to its high-performance hinges and high installation precision, even women and children can open and close the door smoothly without feeling the weight of the door. ・Six safety measures that you can use with confidence even in an emergency An integrated door opening/closing bar that prevents people from grabbing the edges, a safety cover at the hanging base that prevents hands and fingers from getting into it, floor clearance that prevents the tips of shoes from getting into it, a 2-way hinge that allows it to be attached to the frame by operating the handle, and no gaps or protrusions to prevent hands and debris from getting in. Adopts a round flat handle (spokeless handle) that does not get caught, and a handle lock mechanism that prevents operation when opening the door. It can be operated safely even in the chaos of an emergency and prevents secondary disasters such as injuries. Image
URL: https://prcdn.freetls.fastly.net/release_image/32317/480/32317-480-13414fe8f8f830b2486fd0bec55851c6-3600×2400.jpg Opening/closing bar integrated into the door that prevents the edges from being grabbed
https://prcdn.freetls.fastly.net/release_image/32317/480/32317-480-8e5c68be72d154579cdba5886008a556-3600×2400.jpg Floor clearance that prevents the tips of shoes from entering Image
URL: https://prcdn.freetls.fastly.net/release_image/32317/480/32317-480-e8f0040a523661e9f1223795bb28f2b3-3600×2400.jpg Spokeless handle that prevents hands and debris from getting caught ■Wish included in the product name The product name “BOUNCEBACH” includes the wish to “repel” blasts, heat rays, water damage, radiation, flying objects, biological/chemical agents, and EMP, and to “recover” and “get back on its feet” from difficult situations during disasters. It contains. The sky blue text symbolizes “hope and liberation,” and the silver background symbolizes “advancement and the future.” The message “Let’s work together to overcome difficulties” printed on the back of the door is taken from Itoki’s corporate philosophy and is written in 22 languages. While encouraging cooperation and consideration among residents, we are conscious of consideration for foreigners living in Japan and overseas expansion. The symbol mark drawn on the handle part shows a circle of children surrounded by a circle of adults, which teaches the importance and dignity of protecting the weak, while the five colors symbolize the survival environments of water, sand, earth, wood, and fire. It represents and also suggests five continents as borderless.
https://prcdn.freetls.fastly.net/release_image/32317/480/32317-480-f629f361db657c980a48c9a8577758e6-1429×897.png Logo (top left), symbol mark (bottom left), Japanese flag message (right) ■Main specifications (※) Product name BOUNCEBACK Size Frame: 1330W x 2130H x 470D Door: 950W x 2000H x 350D Mass 1400kg (door only) Performance Shock resistance: 400kN/square meter Airtightness: 2㎥/square meter ・h (differential pressure: at 10kPa) Watertightness: 0.03㎥/sqm ・h (water head: 10M) Radiation shielding: equivalent to 200mm of ordinary concrete *This is the standard specification of the product installed this time. We design and manufacture products according to usage and conditions. ■Model room overview Facility name Japan Nuclear Shelter Association Model Room Access 2-13-30 Takezono, Tsukuba City, Ibaraki Prefecture 16 minutes walk from Tsukuba Express “Tsukuba Station” Opening hours 10:00～17:00 Closed days Saturday, Sunday *Long term holidays such as year-end and New Year holidays How to visit Open only to members, administrative/local government officials, and members of the press. However, if you are accompanied by a member, general tours are possible. Please apply on the homepage ( https://www.j-shelter.com/ ) from the inquiry form. ■Reference information *1: Japan Nuclear Shelter Association (Press Release) To the members and secretariat of the “Working Group for Examining the Performance and Specifications Required for Underground Shelters in Case of Emergency in Japan, a Disaster-prone Country” (Dated February 9, 2024) https://www.j-shelter.com/shelter_wg/ *2: Resilience Japan Promotion Council (Press Release) “Working group to consider the performance and specifications required for underground shelters in preparation for emergencies in disaster-prone country Japan” launched (as of February 9, 2024)
https://www.resilience-jp.biz/wp-content/uploads/2021/09/d555496228c08e5fcc8e81a915055887.pdf *3: Resilience Japan Promotion Council (homepage) “Resilience Certification” top page https://www.resilience-jp.biz/certification/ ■About the Japan Nuclear Shelter Association, a non-profit
organization It is a non-profit organization that was established in 2003 and is celebrating its 21st anniversary this year. The main objective is to popularize nuclear shelters that meet certain standards. The company that played a central role in launching the project has had a relationship with Switzerland for over 50 years and has information on Switzerland, which has the most widespread use of nuclear shelters in the world. From 2023 onwards, we will participate in the Underground Shelter Working Group and make recommendations to the government based on the research results compiled by the research subcommittee, in collaboration with the Parliamentary Federation for the Promotion of Shelters (Solid Evacuation Facilities) and
Underground Utilization. . https://www.j-shelter.com/ ■About ITOKI’s equipment business Itoki Co., Ltd. was founded in 1890. Our mission statement is “Designing tomorrow’s work.” “Tech×Design based on PEOPLE”, which provides manufacturing and sales of office furniture, office space design, work style consulting, office data analysis services, furniture for home work and home study, equipment for public facilities and logistics facilities, etc. With our strengths, we support the creation of various “spaces,” “environments,” and “places.” In the equipment business, we accurately meet social needs, including factory and logistics equipment (SAS) that require safety and functionality, special doors that require high technology and reliability, and information security systems using biometric authentication and IC cards. We offer a wide range of system equipment.