MOVEMENT MECHANISM FOR FOLDING ELEVATOR DOORS Tecnical Field

The invention is related with movement mechanism for folding doors.

The invention is especially related with movement mechanism for folding doors which is not required any tension and belt system due to dual-output engine used, consists a less parts, assembly process is eased, malfunction risk is minimised, designed to be not affected from the outer impact and influences.

The Prior Art

Current movement systems for folding doors have one output engine. The pulley which is fixed to this output is used by tautening of a tension-belt mechanism. Some of the current systems create opening-closing motion by fixing the door leaf ends to the belt and pulling- pushing. Some of the other systems, rotate a big pulley with this belt system and open-close the door by the arms on rotation axis of the door. Consequently, current systems are required a tension and belt mechanism. Movement force and speed of the current systems depend on position of the door. Current folding door systems consist of too many parts and all of them are connected to each other. Moreover.they required longer assembly time due to this excessive number of parts and complexity. They have higher cost and higher malfunction risk due to this excessive number of parts.

The switch adjustment is a must during assembly of the movement mechanism on current systems. This adjustment is difficult. The switch adjustment is a "movement termination (start - finish) adjustment". The movement mechanism is placed out of the box in %80 of current systems and consequently affected from outer impacts. Therefore some deformations may occur. The remaining %20 of current systems have folding door which can not be closed 180 degrees.

There are two different mothods used as automatic folding door system.

First method is to drive by 90 degrees on rotation axis. Second method is opening-closing by pulling from the middle point of the door. On all the systems which use first method; engine drive is transmitted to a larger pulley at first. Tension and belt mechanism is used to do this. Then the arm on motion axes is rotated by a larger pulley with rotary joints. It is required quite big place and big amount of parts to be able to run this system. This increase the cost and creates very high malfunction risk.

On the systems which use second method; a belt is tensioned between the pulley on the engine and the pulley placed at the opposite side. The door leaves is moved by pulling to left and right by tensioner belt. It is impossible to stop the door in 180 degrees with this method. In other words the door stands in "W" shape. This is not a preferred situation because of the impression that the door is not fully closed.

Based on the patent investigation result, there is no similar application with the subjected invention on folding door movement mechanism. But some other applications are exist with similar technical field.

The patent application numbered EP1595050B1 is about a folding door. . It is related with folding leaf gate comprising post hung section which is connectable to gate post as hinged and at least one leaf hung section connected consecutively via hinge, to post hung section by at least one or more section hinge and characterised in said folding gate comprises rotating mechanism which is associated with one or each leaf hung section, which sharing a common axis with the hinges connecting the leaves.

The utility model application numbered TR2008/00210 is about W type folding elevator safety door mechanism.

In brief, the current/mentioned weaknesses and disadvantages of current folding door movement mechanisms were conduced to development of the subjected movement mechanism.

Aim of The Invention

The main purpose of the invention is to develop a common movement mechanism which is compatible with all type of folding doors to be able to remove all of the current weakness and disadvantages. The folding door movement mechanism subjected as invention has a very simple design. It is not required any tension and belt system due to dual-output engine used, The engine is fixed to the center. The drive is transferred to the reducer by transmisison arms fixed to the both outputs of the engine and runs with this drive. One of the output drives one leaf and the other one drives the other leaf of the door. The movement mechanism of subjected invention has constant folding door force in any position. Consequently door speed is correlative with engine speed.

The movement mechanism consists of very few parts. The mechanism box assembly can be done very quickly because of this simplicity. The malfunction risk is very low because the transmission system consists of very few parts, The mechanism of subjected invention is not required switch adjustment (movement termination). The movement mechanism is placed inside the box and it has been designed to be not affected from outer impact or influence. By this way the movement mechanism has been protected and deformation risk has been removed. Moreover the movement mechanism is 180 degree enclosable.

In order to achieve the above mentioned objects, a folding door movement mechanism which is placed in a mechanism box and which is used for moving door leaves and characterised in comprising, an engine which creates required drive to open and close door leaves and which has dual output, a reducer to which motion transmitted from engine is transferred directly via transmission arm, without using any tension-belt mechanism, and which adjusts engine speed and changes the motion direction, actuator arms which move door leaves, in connection with reducer. Description of figures

Figure 1 : The perspective view of the subjected invention movement mechanism Reference Numbers

1. Folding Door Movement Mechanism

2. Mechanism Box

3. Reducer

4. Transmission arm

5. Engine

6. Actuator Arm Detailed Description of The Invention

The invention is related with a folding door movement mechanism (1) which is not required any tension and belt system due to dual-output engine used (5), consists of a less parts, assembly process is eased, malfunction risk is minimised, designed to be not affected from the outer impact and influences.

Figure 1 shows an overall perspective view of movement mechanism. Folding door movement mechanism (1 ) is completely placed inside the mechanism box (2) and it has been designed to be not affected from outer impact or influence. By this way deformation risk has been removed

Drive movements required for opening and closing of the door leaves is provided by a dual output engine (5). The engine has dual output. The first output of the engine (5) moves one of the door leaf and second output moves the other door leaf.

Different from the current systems, the reducer (3) used fort the first time with subjected new invention folding door reduce the engine speed and change the direction at the same time. Through this, the door leaves move smoothly.

The transmission part (4) is used to be able to transfer the engine (5) motion directly to the reducer (3) through spring, without using any belt and pulley system. The transmission part (4) is connected to the reducer (3) and the engine (5) motion is transferred to the door leaves by motion arms (6) turns together with the reducer (3).

The folding door movement mechanism (1 ) subjected as invention has a very unique design/structure which is complately different from the similar systems. The most important and markable difference is the engine (5). The most important difference of the invention comparing with the current systems is dual output engine (5). The first output of the engine (5) moves one of the door leaf and second output moves the other door leaf. Another important innovation is changing of engine (5) speed and movement direction with a reducer (3) at the same time. Through this, the door leaves move smoothly. Current systems do not have reducer.