Disaster prevention in underground malls | Company Information | Osaka Chikagai Co., Ltd.

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Disaster prevention in underground malls

Underground shopping malls where everyone can feel safe

Aiming for a safe underground shopping mall-disaster prevention equipment in underground malls

When a fire occurs

The flowchart in the figure below shows an easy-to-understand illustration of fire prevention measures and equipment. In the event of a fire, the detector is automatically activated, and at the same time, the sprinkler equipment is used to extinguish the fire, while the smoker is activated. In addition, fire shutters (partly fireproof shutters) is closed to minimize fires and prevent damage from increasing. We are working to improve and train facilities so that people in the underground shopping mall can be suppressed as soon as possible, by emergency broadcasts and evacuation guidance so that people in the underground shopping area can be quickly moved to a safe place.
When a fire occurs in a kitchen or other fire

A sensor is installed in the kitchen hood and at the connection between the hood and the duct, and when the inside of the hood reaches 180 °C, a fire extinguishing device (for the fryer, range) works to prevent fire under the hood.
At the same time, gas interlocking valve works automatically to prevent secondary disaster from gas. In addition, a fire prevention dumber is installed at the connection of the duct main, which operates at 180 ° C to prevent the spread of fire to the main pipe.
When a gas leak occurs

In the unlikely event that there is a gas leak, the gas leak detector installed at each store will operate, issue an alarm and notify the disaster prevention center immediately, and the security staff rushes to the site to process it. Additionally, Osaka Gas and Fire Department will be notified by telephone to the general public via emergency broadcastevacuation guidance. Depending on the situation, the emergency shut-off valve will be operated to stop gas supply in the underground shopping area to ensure safety.
In the event of a power outage

In the unlikely event of a power outage, the emergency light by the emergency battery will be turned on automatically and instantly (average 10 looks like floor surface illuminance), and the emergency private power generation facility starts to start up. After about 25 seconds, the startup is completed and the voltage is established, and 10 seconds after that (about 35 seconds after the power outage), 1/4 illuminance (150 to 200 look) compared to normal conditions. In addition, this in-house power generation enables quick operation of disaster prevention equipment such as fire shutters, fire pumps, smoke exhaustors and drainage pumps in the event of a fire.
When a flood occurs

For flooding from the ground, a water stoppage version will be installed in relation to the ground road surface of each stairs, and the flood control method will be used together with sandbags to prevent flooding. In addition, we cooperate with connected buildings that share entrances and exits, based on the flood control Activity Manual. Our employees and members of the flood control Self-Defense Force regularly conduct training in flood control before the rainy season to prepare for the prevention of floods.
When an earthquake occurs

It is said that underground shopping malls are resistant to earthquakes. Underground shopping malls have been slightly damaged even in the Great Hanshin-Awaji Earthquake compared to other buildings.
In the event of an earthquake, we will publicize that the underground shopping mall is safer than the ground, and evacuate in a pre-designated evacuation site under the guidance of security personnel.
In addition to conducting various drills based on the assumption of earthquakes, we also conduct inspections of equipment and equipment affected by the earthquake as needed.