The problem of small apartments and uncomfortableold furniture is solved, if you apply to this question your own ingenuity and a little creative. In addition, you can get an exclusive thing - this refers to the question of how to make a sofa bed. Indeed, at times there are very uncomfortable models to sleep on them, and too habitual for demolition in the scrap. So, having not quite a comfortable bed and a few tools, you can create something. We will analyze a simple variant of a folding bed. 
The scheme of the device of a wooden bed.
What may be needed for installation
It:
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You can start to work: the stages
Headboard size chart.First of all, you need to evaluate the old structure - what will have to be replaced in it? Usually these are transverse bars on which, in fact, the sofa is held, and a folding mechanism. So, it is completely necessary to free the furniture from textiles - upholstery, foam rubber and other things. Their condition also needs to be scrutinized. If everything suits you, the fabric is put aside, the foam rubber is in the trash - from long use it can no longer take the appropriate shape. Both halves of the sofa are mounted separately from each other. Go to the tree. If the bars are still quite useful, then they can be left. But since the task is to be a bed, then there should be more supports - because the beds on the beds are hard. Therefore, marking the desired length, the boards need to be sawn and screwed to the frame in the same way as the bars. Their surfaces should be at the same level, otherwise all the edges of the structure will be felt if the owner wants to lie down. This is done on both parts. By the way, about the frame - if it is decided to leave this structure the same, then its state should correspond to a beautiful appearance. Otherwise, before the final assembly, it (frame) is wrapped in the same way as the halves. 
Scheme of the bed frame. Next, you need to mark the fiberboard, for a bed you need to take a thick - at least 10 mm. Its dimensions should exactly match the sectors of the sofa, but if a large double bed is conceived, then the sheet of fiberboard lies flat on the mounted frame. But the problem of a small apartment remains, then you need to leave a collapsible option. Work with the layout engine. Usually on older models, they become unusable due to dropped screws and discrepancies. Therefore, after evaluating their condition, you just need to bring the structure into order - dismantling and screwing it into a new place. However, if it is in a deplorable state and the sofa does not fold, it's worth replacing everything with a new one. For this, a board is nailed to the end of the frame of the future bed, the same thing needs to be done on the other side, and new holes for bolts and fastenings of the mechanism are drilled in them. Two loops are attached to the two parts of the bed, and the structure is connected to each other. Immediately need to make a reservation - the industry is now releasing fairly progressive models, so you need to choose reliable and beautiful - if the bed is conceived without armrests, then the "clamshell" will be all in sight and should have a presentable appearance. Checking the state of opening and closing and dismantling it back, you can proceed to the decorative component. Fabric, if it was purchased in advance, should be cut in a new way, taking into account the thickness of the foam rubber. To do this, the required dimensions are glued to the cut out sheets of fiberboard with a thickness of not more than 5 mm. The foam itself should be 2-3 mm behind the perimeter. 
Scheme of fixing the headboard to the bed. They need to be prepared in advance. With glue you need to be careful - some chemical components can burn foam. You can collect. For this purpose, each part of the bed is individually attached by means of screws to the wooden halves. Fasteners should go from the side of foam rubber and exactly on the frame. After installation, it is necessary to check the folding functionality. Then the halves of the bed turn into a cloth, and it is fastened with a furniture stapler. That, in fact, that's all. Construction of armrests. Making them is difficult, but possible. If the owner wants to shine with a creative, then metal or wooden elements will look great. However, the iron will have to tinker - for fastening you will need to use the Bulgarian or the winning drills to make the necessary holes in the bed under the bolts. The tree in this respect is not so capricious and provides a flight for imagination - electric jigsaw cuts everything, and having processed the product with lacquer, you can expect admiration of the guests coming to the house. The bed, therefore, will be atypical. And also if the old armrests satisfy their appearance, then you do not have to be wiser - screw it with new bolts, and that's it with the end. Back to contents</a>
Additional points and conclusion
Models of beds from sofas can be different -you can make a large bed, to build it in addition to a box for laundry and other things. A beautiful design reception will be a beautiful headboard. In general, the imagination is not limited by anything. The ottomans, which are soft mini-beds, are also popular. For their construction, a minimum of materials will be required. To make a bed, having an old sofa at your disposal is an excellent solution both in terms of saving and getting things that are not on sale. Observing all the rules and techniques, as well as copying mechanisms, you can achieve the assembly of a quality exclusive thing that will make the owners think about whether it is impossible to do any other interior decorations in a new way. People who do something with their own hands always cause respect, this must be remembered before throwing out a thing that has served faithfully for many years.
