What is the secret of hidden loops? Types of door hinges. Overhead loops and their features
Many properties metal doors depend on the quality and quantity of loops in the design. Oddly enough, it is reliable hinges that often save the owners of a house or apartment from uninvited guests. Hinges are door elements that provide convenient opening and closing of the door. For iron doors they must be selected according to the weight and dimensions of the structure.
Doors can be equipped with hidden (internal) or external hinges. External are massive; it is believed that they can spoil even the most sophisticated design with their appearance. Almost any entrance door opens outward, so hinges are welded on the outer (front) side. Since the door is very heavy, the hinges are made massive, and this significantly spoils the aesthetic properties. In addition, when there is open access to door hinges, there are doubts about their reliability. It turns out that the hinges can be easily cut off, or the door can be severely damaged as a result of an unsuccessful attempt at breaking. It is generally accepted that internal hinges for metal doors do not have such disadvantages. That is why entrance metal doors equipped with hidden hinges are gaining more and more popularity among buyers.
Many are also attracted by the “exceptional” reliability inherent in hidden loops, because such a design cannot be hacked by cutting or knocking down a loop. Even with all their will, thieves will never be able to get to the hinges with their hacking tools. It turns out that the house receives additional protection. These loops are located inside the box. Therefore, they are suitable for any, even the most sophisticated door design. Undoubtedly, this can be considered an undoubted advantage.
Is it really found effective remedy fight against "loop" hacking? Among professionals, there is an opinion that most often internal loops are just an ordinary “marketing ploy” of sellers, throwing “dust in the eyes” of buyers. One can cite as an example "Chinese doors", which are soap bubble, ready to burst at any moment (one has only to touch it). When choosing armored doors, you need to pay attention to the burglary resistance class, because only in this case the buyer will be able to choose a good reliable product.
1. Reducing the door opening. When closing hidden hinges hide in special sinuses of the door frame.
2. The more complex structure the higher the price will be. The consumer pays well.
3. The opening angle of such an entrance door is usually somewhere around 90° instead of the usual 180°. As a result, there may be difficulties associated with the movement of bulky items.
4. The internal loops have a shoulder where a large force moment is formed, and this is bad. There is a possibility that as a result of an attempt to open the door wider, the door frame may be deformed in the place where the hinges are located.
5. There is a certain difficulty associated with installing the casing from the side of the hinges, because the canvas rests against it when opened.
6. A decrease in the porch of the iron door from the side of the hinges is formed, due to which the sealing of the gaps deteriorates.
7. In the place where the hidden loops are located, it is quite difficult to produce correct installation seal, and sometimes you may even need another door to achieve good thermal insulation.
There is another opinion, which also has the right to exist. It lies in the fact that the milling of seats for hidden hinges partially reduces the rigidity of the frame, and this may adversely affect the long-term operation of the door.
Some people think that loops can only be cut if they are visible. And when they are not visible, then it is impossible to cut them off. In fact, this opinion is erroneous. If you send the front doors to a special laboratory and break them in there, then the armored doors with internal hinges will last a shorter period of time than doors equipped with anti-cuts and external hinges. The fact is that the latter have a certain number of hidden anti-cuts, which can be located along the entire length of the canvas.
Iron doors with external hinges appeared earlier, because technologically they are much simpler. IN constructively, the outer loop is a cylinder that has been machined into lathe, cut in half and connected with a hinge. One half of the hinge is welded to the door frame, the second to the door leaf. Such simplicity allows even relatively small firms that do not have special technical equipment to master door production without any problems. Doors with external hinges are much less expensive compared to those using internal hinges. Doors with open hinges are necessarily equipped with elements that do not allow the canvas to be removed even if the hinges are cut. In addition, the crossbar system, which locks the door from four sides at once, is well protected from burglary.
You need to have a good idea of the whole scope upcoming work needed to cut ordinary loops. This process will require not only a lot of time, but also the availability of special equipment and power supply, because very strong steel is used to make the hinges. In addition, the process of cutting metal is always accompanied by a lot of noise, so it is simply impossible to cut off door hinges imperceptibly, especially when it comes to an apartment in high-rise building. Today, the realities are such that it will be much easier for attackers to break the lock, open it with an “intelligent” method, or convince the owner of the apartment to open the door for them.
It can be concluded that burglary resistance does not depend on the type installed hinges. In our country, among the manufacturers of metal doors, internal hinges have long been considered a sign of "China", although, of course, they also deserve attention, and in some cases their use is justified.
The decision must be made carefully, carefully taking into account the peculiarities of this or that case. Everything must be taken into account: the originality of the product design, the difference in price, the presence or absence of the need for enhanced security measures, operating conditions. Among those well-known and respected manufacturers of iron doors that have been operating in this market for a long time and successfully, you can always find experienced craftsmen ready to help good advice- just contact us.
Door hinges are an integral part swing structures. Such loops, in fact, are a carrier mechanism: without them, the canvas simply cannot open. Although the fittings are currently produced in a wide range, hidden hinges for interior doors are considered the most aesthetic: from the outside they are absolutely invisible, while such elements provide a 180-degree opening of the sash.
However, it is possible to judge the value of a particular mechanism (handles or hinges) only after considering all the advantages of its use. And the hidden fittings have a lot of advantages.
Based on the method of installing fittings, the following varieties are distinguished door hinges:
- screw-in;
- mortise;
- invoices, etc.
Screw-in canopies consist of two cylinders with an axle and mounting pins. The frame element of such a hinge is attached to the frame, and the door element to the sash. As a rule, screw hinges are installed on interior doors with a vestibule, but they can also be used for other designs.
Mortise elements consist of two plates (they are also called "cards") and an axis to which these plates are attached. They are non-separable (it is better to put such loops on door systems, the sashes of which are not planned to be removed) and removable.
At the same time, mortise hinges for interior doors can be right, left or universal. The latter are considered the most popular: they are of high quality, durable, but, unfortunately, such accessories are very expensive.
Overhead elements fully correspond to their name: they are installed overlay on the frame and sash. It should be noted that the "butterfly" (this is the second name given to overhead hinges) belongs to the class of mortiseless canopies.
"Butterfly" is installed quite easily and simply, so even a beginner home master overhead canopies do not create problems during installation. As a rule, the "butterfly" is installed on interior door systems, although overhead hinges can also be placed on input structures, as well as the doors of outbuildings.
Sometimes a "butterfly" (actually, like door handles) is equipped with forged decorative elements: these exclusive overhead canopies are very expensive. However, how can a unique product be cheap? Too low price for overhead loops is a sure sign that the "butterfly" is made of low-quality metal.
It is worth paying attention to the fact that, in accordance with the current standard, door canopies must ensure the mobility of the leaf, that is, its free opening and closing.
Moreover, the hinges must securely hold the sash, excluding its spontaneous separation from the frame. In view of this, before buying accessories, you need to carefully study the accompanying instructions: manufacturers who value their image make hinges on interior doors from high-quality raw materials (such accessories can provide over 200,000 openings and closings of the canvas).
As a rule, high-quality hidden-type door hinges are made of a special alloy - tsamak. It is based on four metals: magnesium, zinc, aluminum and copper. Some manufacturers use the same alloy in the manufacture of door handles.
Tsamak is remarkable in that it is absolutely harmless to people, and besides, this alloy is durable and has a beautiful smooth surface. From above, a metal product (handles or hinges) is covered with brass, nickel or chrome. Such a coating can be either matte or glossy.
The invisible hinge has an amazing design: it consists of a hinge “recessed” into the metal case, which is connected to the sash using a special lever. And the lever, in turn, consists of two elements that are interconnected by a screw. When the door is in the closed position, it is impossible to see this lever, because at this time it is hidden in a recess.
Benefits of being invisible
Both screw-in and other hidden hinges have a number of advantages:
- Firstly, such canopies provide a uniform fit of the sash to the box, while forming the same gaps from the four ends of the canvas.
- Secondly, internal hinges allow you to open the door 180 degrees, so it is better to choose them and install them on a structure through which large items will often be mixed.
- Thirdly, screw-in and other invisible hinges can be adjusted in three directions (you don’t have to remove the fittings from the sash to adjust).
- Fourth, internal canopies provide additional protection against unauthorized entry into the premises. If you choose screwed hinges and install them on the door, it will be simply impossible to cut or knock down such fittings in order to subsequently remove the canvas.
Naturally, not the least important argument when choosing a door handle or hinges is appearance accessories. Speaking of hidden canopies, one cannot fail to emphasize their valuable advantage - external invisibility, which allows you to install these fittings on almost all swing doors.
Features of the installation of "invisible"
Which canopies to choose depends on the weight of the sash. Some "invisibles" are able to withstand a load of 30-40 kg, while others - 200 kg or more. Naturally, the more durable the door hinges, the more expensive they are. One should not overpay by buying too expensive canopies for installation on a light sash. It is better to purchase "invisibles" and door handles that correspond to the massiveness of the structure.
Screw-in and other invisible awnings are installed on canvases and boxes made of steel, aluminum and wood. Such hinges are mounted in the end of the sash (from the side of the slope) and the box. Self-tapping screws are used to fasten this fitting (in fact, like the door handle). All measurements should be performed accurately, and the work should be done carefully, then the “butterfly”, door handles and other fittings will be installed correctly.
On average, two or three "invisibles" and door handles are installed on each canvas. Interior doors with hidden hinges is a winning option: reliable, durable and aesthetically pleasing. However, which canopies to purchase depends on the purpose of the structure, its weight and location.
You need to choose hinges for installing doors with great attention. The range of fittings is very rich and wide. According to the type of installation, all fasteners can be conditionally divided into several types. Each has a specific functionality that is required for different door curtains.
Mortise hinges
They are one of the types of internal curtains, which are made of two connected plates that fasten the door to the frame. Similar products are called card products in a different way. They differ from invoices in that they are not visible in the box of a closed door. The visible part is the element that covers the swivel pin, which ensures smooth opening and closing.
The advantage of mortise curtains lies in their detachable design, which facilitates quick removal of the door. Overhead loops do not have this feature. There is a universal fitting that fits any type of door and consists of a one-piece mechanism. To remove the door with these curtains, it is necessary to unscrew it from the hinge.
Often, mortise fittings can be seen in dwellings with a "Soviet" interior. It continues to be produced on the basis of the strongest alloys. When choosing this type of curtains, you need to take into account the features of opening the door. Many loops are marked with special letters for convenience.
Overhead external hinges
Such hinges are widely used in interior and exterior doors. Their technology does not require much effort to install. Therefore, almost everyone can do it on their own. The only exceptions are heavy doors, they require more stable fittings.
Screw-in curtains
In another way they are called screwed. This is an innovation in the door market. Just like overhead door hinges, they are easy to mount. When screwed into the canvas and the box, the entire structure is perfectly fixed. The optional height adjustment facilitates a precise and perfect fit. This universal view curtains. They apply for frame structures. Today, many manufacturers make doors specifically for this type of hinge.
A wide range of accessories allows you to choose what you need. You can always ask a consultant or manager who will help in this matter.
The choice of hinges for installing the door should be given no less attention than the choice of the doors themselves. As their assortment is rich, so is the choice of accessories for them. Depending on the method of installation, conditionally, all loops are divided into several types. Each of them carries a functional load, knowing about which you can decide on the need for certain door curtains.
Mortise hinges
Peculiarities
Mortise curtains - a kind of internal hinges, made of mortise hinges of two interconnected cards that fasten the door leaf and the door frame. Often such loops are also called card loops. Their difference from overhead hinges is that they are not visible when the door is closed. visible part there remains only an element that hides a pivot pin underneath, which ensures smooth opening and closing of the door. The advantage of mortise hinges is their detachable design, which provides quick and easy removal of the door from the hinges if necessary. There is a subspecies of mortise hinges - universal, which fits all doors (right and left) and is a one-piece mechanism. To remove the door on such curtains, unscrew the door leaf completely from the hinge.
Application
Mortise hinges can often be found in apartments in which the "Soviet" interior still reigns. Today, mortise hinges continue to be made using durable alloys and processing methods (chrome, gold, polished, etc.). When choosing this type of curtains, it is worth considering the peculiarity of opening the door. Depending on this, you need to stop your choice on the right or left loops. To determine the desired loop for buyers, many manufacturers put the letter “L” or “P” on the cards.
DverExpo prefers mortise hinges with special plugs. This optional accessory carries a decorative and protective function, preventing dirt, dust, moisture from getting inside and thereby ensuring long-term operation of moving elements. No less popular are hinges with additional bearings, which provide even massive doors with silent and easy opening. Interior doors are often equipped with cards with a height of 100 to 180 mm. If the curtains have a lower height, they are intended for window structures or furniture.
Overhead internal
Peculiarities
Recently on the shelves, along with the usual mortise hinges 
overhead loops appeared, the installation of which takes place according to a similar principle. Distinctive is the absence of the need to cut parts of the product into the door leaf and door frame. Unique Design the laid on inner loop allows you to fasten both parts of the structure with screws. The products are made in such a way that the card that is attached to the doors is included in the card that is attached to the door frame.
Application
These loops are widely used in the installation of interior and entrance doors. Due to the fact that they do not require additional tie-in, complex manipulations, knowledge and tools, each owner can independently hang the door on the hinge. The exception is doors that are too heavy (armored, made of natural wood etc.) that require more stable loops.
screw-in
Peculiarities
The so-called screw-in hinges are a new discovery in the field of door fittings. 
They gained rapid popularity due to the ease and speed of installation of the door. Screwing into the door leaf and into the box, they perfectly fix the door, and the presence of additional height adjustment allows you to install the door perfectly. Screw-in hinges are universal and do not require preliminary determination of the door opening side.
Application
The screw hinge is used for frame doors made with quarters. Many door manufacturers convert part of their production specifically to these hinges.
The abundance of the range of door hinges allows you to choose exactly those that are suitable for a particular apartment door. If you have any questions, you can always ask our consultant.
Overhead outdoor
Peculiarities
This type is a kind of outdoor 
loops and is considered the most ancient. The variety of shapes, colors and workmanship unites general way installation. To install such door hinge not required preliminary preparation door leaf and door frame. The principle of installing the door lies in simple execution two steps. 1). It is necessary to screw one part of the hinge to the door. 2). The second part is attached to door frame after the door is exactly set in it. Fastening is often done with household screws.
Application
Since ancient times, overhead hinges have been not just fittings, but part of the door, fastening the boards of the door leaf together. Today, these hardened steel hinges are used in many utility rooms, sheds, buildings and on gates, wickets (more often in rural areas). Forged overhead hinges have become not rare and even fashionable, the design of which is appropriate in the interior of "shebi chic", "retro", "rustic style". Overhead forged hinges on doors in antique-styled apartments are ideal.
