Undo codes for Japanese elevator floor buttons • Hacker News Board

Re: Undo codes for Japanese elevator floor buttons

#101

Post by kevincox » Mon, Jan 09, 2023, 2:47 PM UTC

neilv wrote: post #12

And on the opposite-of-polite side, supposedly there's cheat codes for bypassing floors where someone is waiting for the elevator.

This could actually be useful and "polite" when you are in a full elevator. Often times there will be a packed elevator going to ground but it needs to stop+open+wait+close on every floor even though nobody can fit in. This just reduces throughput and can make rush periods stretch on for a long time.

I've always wondered if elevators code detect when they were full and avoid stopping for outside requests. Some combination of total weight + weight change could likely be a heuristic that improves performance overall.

Re: Undo codes for Japanese elevator floor buttons

#102

Post by Arnavion » Mon, Jan 09, 2023, 8:34 PM UTC

remram wrote: post #99

Arnavion wrote: post #66

Earlier quoted context omitted.

How do you know they don't just do it because they're used to the door not closing immediately?

They are, and it doesn't. I don't understand your point.

They press the close door button because they know they have the time to turn around, notice someone else entering and press the open door button.

Re: Undo codes for Japanese elevator floor buttons

#103

Post by themitigating » Mon, Jan 09, 2023, 9:12 PM UTC

yellow_lead wrote: post #100

themitigating wrote: post #93

Earlier quoted context omitted.

"All handicapped people are in a wheel chair"

Complain to the government then. "Car Control Height. Maximum height for control buttons and mechanisms is 54 inches (1370 mm). Minimum height is 35 inches (890 mm)." https://www.ada-compliance.com/ada-compliance/ada-elevators....

"No because that's government regulations and they are all bad"

Re: Undo codes for Japanese elevator floor buttons

#104

Post by jsmith45 » Mon, Jan 09, 2023, 9:36 PM UTC

johnnyo wrote: post #34

pronlover723 wrote: post #18

Other things about Japanese elevators 99% the "close door" button works immediately. Vs say USA where 80% are not even connected and where some are connected but the door doesn't respond for 1-2 seconds? 95% there are no light sensors, only pressure sensors. I'm guessing in the USA those are mandatory that there is a light sensor that if interrupted, causes the doors to open. In Japan those mostly don't exist, there…

One reason door close buttons don’t work is because many places have a minimum time the doors have to remain open under ADA guidelines. Once that time has passed, the door close. So there is no window in which the button would be useful.

Yeah. there is a minimum dwell time, and the door close button will never close the door sooner than that on modern code compliant elevators in normal operating mode.

It is possible that there will be a default dwell time that is larger than the minimum, in which case the pressing the door close button would shorten the window to the minimum, but most elevators won't do that as the minimum is long enough already.

Similarly the door close button may have effect when the door open period was extended, such as by the door sensors, or pushing the door open button to prevent door closing, but the exact details will vary.

In other operating modes, especially firefighter mode, but also some maintenance modes, and some modes that expect a dedicated elevator operator (who can ensure the door remains open long enough for disabled people if present), the door close buttons do absolutely do have an impact, and can violate the normal dwell time rules.