Roller shutter with belt drive

Abstract

 The Easy Fix Roll Shutters consists of the box (1), the side panels of the box (2), guides (3), the sliding pads (4), the axis (5), the pulleys (6), the bearings (8), the coil (10), the belt (12), the moving mechanism (actuator) (13) and the rolling part of the roll (14).
The features of the invention are the holes (7) circumferentially around the pulley (6), the new aperture of the box of the roll shutters (9) and the slot (11) which on the new coil (10) for the exiting of the belt (12).
The advantage of this invention is the new aperture in the log box, which because of its size and location on the shutters' box, it offers easier operation and minimizes the physical strength needed to open the shutters.
An important advantage also achieved is the significantly less friction that appears during the exiting of the belt from the box, the moment it passes through the coil. So it's less probable to face wear of the belt-which until today is very common incident. Moreover, even in the case of destruction of the belt, by the help of the main features of the invention, replacement is easy, without having to open the box of the shutter, but simply by removing the coil. From this position we can find one of the holes in the pulley that serves us better and stabilize the new belt. This procedure saves us time but also reduces the total cost of repairs.

Description

[0001] The invention relates to an easy to repair roll shutter for frames, whose main parts is a box with its side panels, its axis within the box, the guides and the rolling part of the shutter. Additional parts needed for operation and movement are the pulleys, the sliding pads, the bearings, the coils and moving mechanism (actuator).

[0002] The shutters for doors and windows are already known. Placed at the top of the window and by placing them they offer us heat and sound insulation, shading and extra security.

[0003] Existing manual roll shutter works as follows: To move the sliding part of the roll upwards and to gather it inside the case, the user simply pulls the belt drive of the roll downwards and in order to close the shutter we simply doing it by releasing the safety of rolling mechanism and the moving part of the roll descents down to the desired point.

[0004] Technically, this can happen because during the manufacture of the roll we tie the one end of the belt (the other is secured in the rolling mechanism) into a hole we drill on the perimeter of the pulley which is located at the one tip of the shaft. We rotate the shaft so that the belt to gather around it and then we stabilize the rolling part of the roll on the shaft in the opposite direction from that of the belt. The strap exits the box through an opening at the top of the box and to assist its movement we place externally a coil, so the belt passes through this and ends in the rolling mechanism where the secured its tip. Thus when we pull the belt is unwound from the pulley thereby rotates the shaft and thereby causing the upward movement in the rolling part of the roll. To download the shutters we just release the belt from the safety of the rolling part, the roll is lowered by means of its weight and the belt is wound again around the pulley and the shaft.

[0005] The construction of this roll has several disadvantages. These have to do with the way that operates the roll, the damage caused because of this, the repair procedure and the time wasting for repair.

[0006] One of the most frequent problems encountered, is the wear of the drive belt. For the rapid wear, mainly responsible is the path that the belt follows, as well as the high friction generated at certain crucial points. More specifically, the belt exiting the box and the moment it passes through the coil, it forms orthogonal angle and thus it suffers very high friction, which quickly leads the belt to wear.

[0007] The next important and very frequent problem faced by the repairman, is to replace a broken belt. To change the belt in existing type of rollers, is needed - because of their construction- to open the box of the shutter, disassembling components inside the box, rotation of the pulley with the shaft until you find the hole, where you must remove the old, damaged belt and install the new. A process, that requires a lot of time and effort, which raises the cost of maintenance.

[0008] The advantage of this invention is to minimize the probability of damage to the belt and even if this occurs, the replacement to be done without having to open the box and the roll to be dismantled.

[0009] Firstly, the outlet aperture of the belt of the box of the shutter, in this invention, is much greater and to cover it we use a new larger coil as well. In this way we achieve a new exiting position of the belt, which creates a smaller bending angle when exiting and so less friction and therefore less likelihood to get destroyed by the daily use. An additional advantage of the greater area of box's aperture is that by just unscrewing and removing the coil we have visual contact of the pulley and also enough space to intervene and replace the belt without requiring the opening of the box of the shutter.

[0010] An additional help for easy replacement is also the second main feature of the invention, which is a new kind of pulley mounted to the shaft. This has on its perimeter a multitude of holes where the belt can be laced on. So by removing the coil, as mentioned above, we have visual contact with the pulley and we can stabilize the new belt on the pulley at any hole and we just cut the old one.

Figure 1 shows a perspective view of the easy repair roll.

Figure 2 shows a perspective view of the easy repair roll with the new coil unscrewed (11) while it is also evident the aperture (9) in the box.

Figure 3 shows a sectional view showing the path followed by the belt (12). Which is starting from the pulley (6) passes through the coil (10) and the slot (11) and ends at the actuator (13).

Figure 4 shows a perspective view, two side views and a section of the pulley (6) with holes (7).

Figure 5 shows an easy fix roll shutters with apparent all parts of which it is composed.

[0011] One way of implementing this invention is described by reference to drawings. The easy repair roll consists of the box (1), the side panels of the box (2), the guides (3), the sliding pads (4), the axis (5), the pulleys (6), the bearings (8) the coil (10), the belt (12), the moving mechanism(actuator) (13) and the rolling part of the roll (14).

[0012] Also numbered are the features of the invention which are the holes (7) around the pulley (6), the new aperture in the box of the roll shutter (9) and the slot (11) exists in the new coil (10) for exiting of the strap (12).

[0013] In the drawings are shown here the new aperture of the box (9) has a specific size, but does not prevent the creation of openings of different sizes according to the needs of each roll, as well does not prevent the use of several sizes of coil (10). Moreover, it is not prohibitive, that the slot (11) in coil (10) to be constructed in various dimensions, or even to have it on a different spot in the coil, as the goal is to have the least possible friction. Finally the invention does not bind the number and size of the holes (7) on the pulley (6).

Claims

1. The easy fix roll shutters consists of the box (1), the side panels of the box (2) guides (3), the sliding pads (4), the axis (5), the pulleys (6), bearings (8), the coil (10), the belt (12), the moving mechanism (actuator) (13), and the rolling part of the roll (14) and is characterized by a pulley (6) which has more than one holes ( 7) where we can selectively stabilize the belt (12), a large aperture (9) of the box, at the point where the belt passes (12) and the a new coil (10) whose size is proportional to the aperture (9) of the box.

2. The easy fix roll shutters, according to claim 1, is characterized by a pulley (6) mounted on the shaft (5) which has circumferentially more than one holes (7) and so the belt (12) can selectively be stabilized in the appropriate hole.

3. The easy fix roll shutters, according to claim 1, is characterized by a large aperture (9) of the box from which the belt (12) passes through to exit, minimizing the bending angle of belt's path and so friction during operation of the roll.

4. The easy fix roll shutters, according to claim 1 is characterized by a larger coil (10), comparable to the size of the aperture of the box. The coil is placed over the aperture (9) of the box where it facilitates the moving of belt out of the box, minimizing friction.

5. The Easy Repair Method of the roll, is characterized by the fact, that by unscrewing and removing the coil (10,) there is clear visual contact of the pulley, so the belt replacement, can be done by using selectively any hole (7) of the pulley (6), while the box (1) and pulley (6) remain in the operating position.

Drawing