Build an Easy Temporary Door Chain Lock




After a "this stuff belongs to me becuase your a jerk" war that I recently had with my younger sister. Instead of fighting with her childish games, I decided to out-smart her.
In this instructable, we will be building a temporary door lock using a chain.
Its a one-way lock meaning it can be locked from the outside and not the inside although if you do this right, you can unlock it from the inside as well.
This should take you no longer than 10 minutes if you have all of these parts around your house.
As usual I am NOT responsible for damages or injuries.
Not recomended for weak doors, or strong sibblings.
This lock is in no way to keep out a cat burgalar or a real robber and should NOT  be used that way. This lock was designed to keep out a 12 year old girl from entering my bedrooom when Im away. If sombody really wanted in that room they would just kick the door down.

Step 1: What You Need

This is what you need

-channel lock pliers (or some sort of heavy, strong, pliers)\
-measureing tape

-chain (at least 7ft. 10in.)

Thats everything.
I had all of this around my house so it didnt cost me a dime to build this.

Step 2: Anchor It

Measure your chain to insure it is long enough for the job
Find a place near the door and use the pliers to lock the anchor down as shown. I anchored mine beteewn two doors, but an anchor can be anything from two doors to a railing to another lock to just something really heavy. you decide based on your floor plans of your house and how much chain you have

Step 3: Tread It

Push the rest of the chain under the door and around the door knob. Then you may tie a piece of string to the last link to give yourself easier reach for the chain. Then pull the chain under the door

Step 4: Lock It

Put your lock in one chain link on one side of the chain then through another on the other side.
close the lock and youre good to go  Depending on the chain length and the place where the lock is the door should only open a few inches befroe the chain pulls and the door is stopped.

Step 5: In Case of Emergency, Remove Chain

If you have a sibling who is crazy or dumb enough to steal an Ibanez guitar out of the case, or take a Yamaha keyboard without the wall adapter, then more than likely, they will want to lock you in that room.
Try to avoid this by keeping your lock off the chain when not in use and putting the chain in the room when youre inside the room.
If something should happin and someone locks you in that room with that chain, pull the chain up and over the door knob. The lock is then disengauged and no loger works unless put back on the doorknob.



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    10 Discussions


    7 years ago on Step 4

    If you can open the door this far what prevents someone from sliding the chain around the corner of the door so they can lift it off the knob?


    7 years ago on Introduction

    Please edit and spell-check your work.

    becuase your ... because you're
    sibblings... siblings
    burgalar ...burglar
    bedrooom... bedroom
    Im ...I'm
    measureing... measuring
    didnt ... didn't
    Thats ... That's
    insure ... ensure
    youre ... you're
    happin ... happen
    disengauged... disengaged


    7 years ago on Introduction

    Better pictures aren't necessery but it would be nice to get a better shot of the way you secured it to the wall. But maybe I'm not RTA'ing well enough.

    3 replies

    Reply 7 years ago on Introduction

    actually the ancor is the chain that is mearly wedged between the two door frams. you can use anything though. For example an other door knob


    Reply 7 years ago on Introduction

    haha well that sounds good enough. sometimes its easier to change the environment/situation than the people contained within the equation.

    Ok well Usually more often than not, its advantageous to generally manipulate the environment to suit ones needs in such a way that it encourages good behavior of the people stuck in bad patterns.

    :P That may just be my view though.


    Reply 7 years ago on Introduction

    Well sometimes its easier to change the environment and sometimes its easier to change the people. In my case it was easier to change the environment


    7 years ago on Introduction

    its an interesting idea but I'd not want to secure the chain to the outside of the door unless i had an eyebolt ran straight through the wall to the Secure side of the door so that it would be annoyingly difficult to undo the securing of said room.

    1 reply

    Reply 7 years ago on Introduction

    its quite annoying and seldomly ever used but it does get the job done. seeing as how it is in order to keep my 13 year old sister out of my rrom that has expensive guitars and things i wouldnt want here to touch, its worth it