Door closer: the principle of operation, device and recommendations for installation
If there is a need for the door to close automatically, the best thing you can think of is to install a door closer. Adjustment and proper installation of this device will allow to solve the draft problem once and for all, as well as overcome the laziness and forgetfulness of some visitors. Most often, such a device is installed in places where there is a great deal of people passing through: offices, the entrances of apartment houses, shopping centers, railway stations, etc. Often a door closer is found in a private house, especially among those owners who love and value their comfort and aspire make the home as cozy as possible.
The device and the principle of operation
The simplest device that can be used to automatically close the door is a spring. The door closer realizes the same principle of action. At the heart of his work is the force of tension, which occurs when the spring is stretched, placed in its body, which, in turn, is filled with oil. The strength and speed at which the door closer closes the passageway depends on the type of device and can be adjusted with the adjusting screws. The principle of operation is as follows: when the door is opened, the man's effort is transmitted through the piston and the pull rod to the spring, which leads to its compression. At the same time, the oil flows through the valve into the released chamber. And after the person releases the door, the spring acts on the piston, and the liquid returns to the primary chamber. Note that the movement of oil is carried out on a hydraulic system, which consists of channels and which can be adjusted with screws. The more they screw into the body, the narrower the channel becomes, and the liquid flows more slowly.
Closer door: how does it happen?
Some models of this device are equipped with a special valve, which is responsible for the additional door "closing / closing", as well as a mechanism for delaying closing of the doors. The latter function is very useful in cases where through the opening you need to bring in or take out a lot. Door closer can be installed on almost any type of door, from wooden to glass. The speed with which this device performs its work is usually regulated on two levels: the first is responsible for the closing speed along the major axis of the door leaf, and the second - for the final closing, which occurs a few centimeters before the box itself. By its power this device is from forty to one hundred and twenty kilograms. The correct choice and installation of door closer is largely dependent on the weight of the door leaf itself. If it is too light, then a powerful device will quickly damage it. In the reverse situation, if you install a weak door closer to the heavy door, it will not be able to properly perform its functions and will quickly break down.
Installation and operation features
The installation of the device depends entirely on the direction in which the door is opened (from itself or to itself). Its installation is carried out in the upper part of the door frame or on the door leaf itself (also in the upper part). To keep the door closer long, remember that you can not pull, hold or fix the door with different objects. From this, the piston and seals wear out in it, the gears break and the oil leaks out. Spoiled closers are not subject to repair, and therefore they have to buy new ones instead.