YKKap Fireproof Door G Series Apartment Entrance Door, WEST917 Cylinder Malfunction Repair

"The key doesn't stick, so please check it."

It is a combination of GOAL TLK + WEST917.The cylinder could be improved by disassembling and cleaning, but when I saw the door, I felt something was wrong.

I saw an unfamiliar strike on the underside of the door.It wasn't related to the operational defect, but I got a lot of information after the work was done.

YKKap Fireproof Door G Series Consider the entrance door for an apartment

The door was labeled as a YKK ap fire protection door G series entrance door for an apartment.

I do not understand that it is necessary to lock (close) the door in the event of a fire, but I was able to obtain information by checking with "Fire protection door certified by the Ministry of Land, Infrastructure, Transport and Tourism".

Prevention of falling in case of fire

"In the event of a fire, the upper fuse latch will be engaged and the lower latch will be engaged in conjunction with the central handle latch, restraining the door to the frame and preventing the flame from leaking."

hereA little item description is described.
This is also helpful.https://www.daiwa-tatemono.net/pride/premium/pdf/op17.pdf

Restraint of the front door by the upper fuse latch

It seems to be a mechanism that locks when it senses heat, but I couldn't find it when I looked it up.There is no description in the catalog.

It looks like a lock case with a "temperature fuse", and it seems that a dead bolt comes out when the fuse blows by detecting the heat from a fire.There is a description that the attached wire is pulled to release it.

However, this wire can only be operated indoors.

The engraving on the front is "GOAL BD-2".However, I didn't get caught in the search.

Interlock lever that works with the central latch bolt

There is no peculiar structure in the lock in the central part, but something is equipped in the strike part.An interlock lever whose movement is restricted by a latch bolt.

On the right side of the photo, you can see the interlock lever parts inside the central strike.It is linked with the interlock bar in the lower strike part.

If the latch bolt is out, it is interfering with this interlock lever.Therefore, the interlock bar inside the interlocking lower strike is also constrained.

Interlock bar that is also linked to the lower strike

This interlock bar will not be released unless the central latch bolt is pulled in.This also restrains the lower door.

Shaped like a knife in the photo on the left, this latch bolt retracts in when closing the door.It usually stays popped out and seems to work like a normal latch bol.

The strike on the right has an interlock bar.When you open the door, you will fall to the right.This will open the door.

However, because it is linked to the interlock bar in the center, if the latch bolt is not released, the lower side will remain restrained by the door frame.

How to open the door after extinguishing the fire

If the room is burnt down, you will have to enter the room from the outside, but you have no choice but to break the fuse latch mechanism at the top and pry it open.Therefore, the latch shape is a plate shape so that it can be easily broken.

If you have been evacuated indoors due to fire protection against an outdoor fire, you will go out of the room after the fire extinguishing activities are completed. increase.

I finally understood (refreshing).