A Japanese company is developing a door within a door, which is a great idea

When the door is not the door?

A few years ago a fairly strong earthquake shook the area where I lived. Fortunately, the damage was relatively limited, but it was definitely a few minutes severe. During that moment, while I was collecting the children in a safe part of the room, I was surprised to see that the first thing my wife did was to immediately rush towards the front door and open it.

I had no experience with earthquakes and had no idea why at the time, but after I explained that strong tremors tend to deform the door frames, making it impossible to open them and locking people inside. This might be the worst-case scenario, but even if people were quick enough to open their doors during an earthquake, the torsion could still make it impossible to close and lock properly, causing a whole other set of security issues.

It’s a big problem, but one for which the entrance of Shin Nihon in Tokyo has developed an elegant solution. The Tasukaru door (“door of the savior”) is simply a door within a door.

To put it less simply, the door inside the door is actually a Taishin door (seismic door) that has features that make it less likely to jam when deformation occurs. If you look closely at the photos and video, the interior door has more space between the edges and its frame. This means that if the door is bent, the frame is less likely to touch the edge of the door and prevent it from moving. The additional space between the interior door and its frame is then covered with a flat flange that extends on all sides on the exterior and interior surfaces.

▼ It can be a little hard to visualize, so here’s a rough outline

Photo: © SoraNews24

Plus, what’s the point of having an emergency escape door if you can’t enjoy it once in a while, too? That’s why the Tasukaru door has the added advantage of opening safely with a screen cover to let in some fresh air and save us not only from earthquake damage, but from the intense summer heat.

▼ This could be you!

Photo: YouTube / Shinnihon Entrance Co., Ltd.

It’s a very powerful idea all around, and as a result, Shin Nihon Entrance has been receiving requests to install Tsukaru door in 290 housing units in Saitama Prefecture alone since it was first launched in February 2021. Therefore, everyone in apartments and condos should stay away from these designs. Double-door, as it might become the norm before too long, and help save a lot of lives in the process.

Source: Shin Nihon Entrance, PR TimesTop image: PR Times ● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!

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