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 you to once and for all solve the problem of drafts, as well as overcome the laziness and forgetfulness of some visitors. Most often, such a device is installed in places where there is a large cross of people: offices, porches of apartment buildings, shopping centers, train stations, etc. Often, a door closer is found in a private house, especially for those owners who love and value their comfort and seek make the home as comfortable as possible.
Device and principle of operation
The simplest device that can be used to automatically close the door is a spring. The door closer implements the same principle of operation. The basis of his work is the tensile force arising from the stretching of a spring placed in its body, which, in turn, is filled with oil. The strength and speed with which the door closer closes the passage depends on the type of device and can be adjusted using the adjusting screws. The principle of operation is as follows: when the door is opened, human effort is transmitted through the piston and traction lever to the spring, which leads to its compression. In this case, the oil through the valve enters the freed chamber. And after the person releases the door, the spring acts on the piston, and the fluid returns to the primary chamber. Note that the movement of oil is carried out through a hydraulic system, which consists of channels and which can be adjusted using screws. The more they are screwed into the housing, the narrower the channel becomes, and the fluid flows more slowly.
Door Closer: what happens?
Some models of this device are equipped with a special valve, which is responsible for an additional “shut-down / argument” of the door, as well as a mechanism for delaying the closing of the leaves. The latter function is very useful in cases where you need to bring in or take out a lot through the opening. The 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 at two levels: the first is responsible for the closing speed along the major axis of the door leaf, and the second is for the final closing, which occurs a few centimeters in front of the box. In terms of power, this device is from forty to one hundred and twenty kilograms. The correct choice and installation of a door closer depends largely on the weight of the door leaf itself. If it is too light, then a powerful device will quickly damage it. In the opposite situation, if you install a weak closer on a heavy door, he will not be able to perform his functions normally and will quickly break down.
Installation and operation features
The installation of the device completely depends on the direction in which the door opens (on itself or on 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). In order for the door closer to last for a long time, you should remember that it is impossible to pull, hold or fix the door with the help of various objects. From this, the piston and seals wear out in it, gears break and oil flows out. Damaged door closers cannot be repaired, and therefore you have to buy new ones instead.