Furmability and smoothness of the door closing are not only an indicator of comfort. With sharp movements and blows about the frame or wall, the door canvas itself, a hinge experiencing an increased load and a box rack that makes up the impact force. Obviously, this kind of closing does not contribute to a long service life.
Choose a door closer
Closer: Specifications
It is a mechanism that provides automatic closing of the sash. Since in this case the human factor is absent, then closing is performed smoothly, without too much effort. The simplest device consists of a spring concluded in a metal housing and a spilled with special oil. With the open door, the spring is compressed, and when the door is released - it is squeezed and slams the sash.
So simple device today is rarely applied. In modern versions of the bridge, a more advanced system of transferring moment is being implemented.
- Tooth rail - a mechanical transmission is carried out. Thus, a large smoothness of springs straightening is achieved. Not used in appliances with sliding canal.
- Catching - gearbox serves profiled core cam. By changing the profile, the required degree of springs compression is achieved, thereby providing the most comfortable closing mode of the sash.
It should be remembered that the door closer, according to the instructions, are a mandatory element of special doors: fire-fighting and evacuation, since in this case the findings in the closed state, is a matter of principle.
Classification of door closens
The most important for the consumer is the possibility of adjusting the door movement. The latter will depend on the mass of the product and its width, that is, from the moment of inertia. This indicator is determined by the EN 1154 standard. The closing force devices are divided into seven classes - EN1-EN7. The first are intended for the easiest interroom structures, the latter for steel entrance.
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We are manufactured as one-class versions, that is, with an exact indication of the category and adjustable, allowing you to change the opening force. Mark up the last thus: EN 2-4. The manufacturer's instructions tend to provide a table indicating the mass and width of the sash and class of the product.
The second important technical characteristics of the device - the transmission of the torque.
- The lever or knee - the lever is two connected axes, which, when torn the sash, bend in the knee. Hinged thrust is distinguished by mechanical strength and durability, but not enough protected. The lever is mounted on the door frame and canvas and is fully accessible, why often becomes a victim of hooligan actions. In the photo - an option with lever transmission.
- A device with a sliding channel - the free end of the lever when opening moves along the channel. The lever in this case is not available, but the work of the device itself requires a greater effort. For the bridge of this type, a cam mechanism is used, since the latter provides better moment transmission.
- Outdoor - the device is mounted in the floor and not available. When bilateral opening, the sash is set to the spindle of the closer. With one-sided - placed next to the canvas. Select this option is recommended for stores.
- Frames - acts similarly to the floor, but attach directly to the door frame.
The technique of instruments includes the installation method.
- The invoice - applies most often to install the device with a hinged pull. If in the initial project, the installation of the closer was not provided for, then this option is the only one. In the photo - a sample of the invoice.
- Hidden in the frame - characteristic of frame devices and appliances with a sliding channel.
- Hidden to the floor - floor versions.
- Hidden on the door - applied to frame closers. The photo shows the sample.
The last three methods provide protection against the actions of the vandals. In the photo - a sample of hidden editing in the frame.
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How to choose a closer
The first thing to pay attention to is the mass and size of the door. The required power class can be defined in the corresponding table often attached to the instructions.
- The weight of the product is the larger the mass of the sash, the more powerful the closer will need.
- In case of insufficient closing force, the installation of two simultaneously acting devices is allowed.
- With the width of the sash more than 1600 mm, the closer cannot be used.
An important characteristics include other parameters.
- The closing speed is a certain numerical value of the indicator. It is determined conditionally, with the help of visual observations. For the fire doors, this figure must be maximum, and in case the closer is installed in a private house where children or the elderly live, the speed should be small.
- Slamming speed - the time of passing the last part of the trajectory. It matters if a snap-on lock is used.
- Braking opening - a device with such a function is recommended to choose for public institutions where a part of visitors is trying to open the door, making an excessive force, thereby provoking the possibility of hitting the wall and damage to the web and the device itself. The function limits the effort, not allowing to act too sharply.
- Closing delay is the importance of this moment individual. On the one hand, the slowing down of closure is undesirable during the cold weather, on the other, it represents convenience in a situation where the user is engaged in hands - shopping, for example.
- Fixing an open sash - is mandatory for medical institutions. The function allows you to hold the door open during the movement of goods or patients on stretchers.
In modern models of the device, the listed functions are quite often adjustable, which, of course, increases the cost of the product. The instruction presented in the video will help you select the device.