hold-open door hardware

When the first human sanctuary with solid walls is built, they must have been built with openings that one can enter.
Then there was a storm that led to the need for a way to close the opening in bad weather.
At first, the means of closing the opening may be the curtain;
Later, after the idea of the hinge was expressed, it became a door.
Doors are a very convenient way to close, but they are a less convenient way to open.
Obviously, no door provides the most convenient access.
When a person approaches, the door that he opens and closes is almost as convenient as there is no door, however, the automatic door is expensive and requires a lot of energy, these energies are wasted on people who can open doors for themselves.
However, because people are often lazy or forgetful, being close to the hydraulic door is a convenient way to ensure that space students are closed through the back door.
Door closers are mainly concerned in commercial applications for cooling and heating energy saving, or in safety applications such as multiple
Residential units or other safe spaces.
Due to the wide use of the door closers, sometimes the door that needs to be kept open temporarily, otherwise it will be closed automatically.
The scope of this need ranges from convenience to convenience, for example, bringing a load of groceries into one\'s apartment building, and more importantly, for example, opening doors in hospital corridors for daily use, at the same time ensure that the door is closed and actively locked when the fire alarm.
In the case of an apartment building, usually like the Ives FS455 or FS1153 above, there is a kick-door stand or piston-type door stand to do the job.
The problem with the kick or piston is that the rubber is often worn out and then the metal leaves a permanent unpleasant mark on the floor.
Also, this mechanism itself wears out especially when kicking, and then it seems like it wants to keep the door open all the time --
Not good for safety.
Something on the hook-and-eye (
Like Ives FS446 at the beginning of this article)
Often enough.
The user must open the door and then pass the hook through the eye to secure the door in the open position.
If the door must be kept open frequently, or if the user is right (
Or unable to execute)
The work of putting the hook in place, there are several springs-
Drivers that do the same work, but do this every time the door is opened to a certain extent.
One of them is the automatic door bracket, such as the Ives FS40 at the top right.
The degree of openness is controlled by position.
The user opens the door until the striker installed on the floor (or wall)
Engage with the door-mounted spring-
Loading mechanism.
The door remains open until the striker is pulled out of the spring loading mechanism.
Keep the door closer with friction-open arm (see below)
Apart from not taking up floor space, it works roughly the same way.
Problems with friction retention-
The open arm is the same friction that keeps the door open to wear the mechanism that causes friction.
This means that more people use friction to keep-
Open your arms and the sooner someone climbs the ladder and adjusts it.
Tell me, will that be you? I think not.
If you really pay attention to the idea that your door is closer to you, that is, your door --hold-
Door opener, your door is not more than 7 feet high, I suggest you use something like LCN below, they call it \"hold\"
Open the Cush \'n stop\' arm.
Norton door controls also offer a much closer idea to the same, but what they call \"keep\"
Open our arms closer to us.
As you may have noticed, the difference is that the user turns to activate hold-
The opening function of the closed door.
The handle means that the impact is no longer friction.
Open, so adjustments are often less frequent.
One additional benefit is that the door can be fully opened without activating holdopen.
Less maintenance and more control: I would say it\'s a winner.
You can get a separate hardware that can do the same thing: stop and stand on top of your head, instead of keeping the open feature closer to your door.
When you have an exterior door that is affected by the wind, the stops and brackets on the top of your head are great.
It will stop the door before the door reaches the end of the swing to prevent damage to the hinge and close to the door itself.
The problem with overhead parking and stand is to install it with a closer door.
If an elevated block and bracket for surface installation is selected, it is usually necessary to be installed opposite the door from a closer point, or the closer position must be modified so that it can bypass the block and bracket on the top of the head.
Okay, I admit it.
This is often a nightmare.
But if you spend a little time with the manufacturer\'s technical support staff, it will be very effective.
The overhead stop shown below is the green Johnson 100S series.
It\'s a hidden overhead stop
This is the easiest way to park overhead and allow work close to the door.
In addition to mechanical holding, there is also an electric option
Electric on.
Electric hold
Open is usually used in commercial or institutional applications together with fire alarms.
They are most commonly used in the doors of the hospital corridor, which are always open before the fire alarm starts.
Then keep the electricity-
All the opening devices are released, so that the hydraulic door shut is closed.
There are two kinds of electricity-
Open: Electro-magnetic and electric.
In short, it\'s a magnet.
Mechanical and electrical maintenance-
The Open Door is merged into a closer door so that the same mechanism that keeps the door open will also close it.
Here is an example of both.
Both are designed as life safety hardware and work with fire alarms to help ensure fire doors are closed and actively locked in the event of a fire: serious business.
In addition to the life safety features of telecom and electro-mechanical hold open, they are sometimes used to keep doors open for other reasons.
For example, a high-power executive can throw a switch, open the door, and keep the door open until the executive throws the switch again, releasing the hold on.
On the one hand, one may think this is the peak of laziness.
I mean, can\'t you stand up and close the door?
On the other hand, there is also a dramatic effect: After the meeting, the door is mysteriously closed behind the last vice president who left, which seems to be entirely his own. Spooky.
Closing is a metaphor for many life events, and so is opening.
Opening a door will bring unexpected consequences and unforeseen connotations.
Choose your hold-
Open hardware wisely.