Author: admin
Date: 1-06-2019, 15:41


An escalator is a moving staircase used for passenger transport up and down at a short vertical distance. Escalators around the world are installed and used in places where lifting is not possible. The main uses of this device are in shopping malls, airports and transportation centers, business centers, hotels and public buildings. The benefits of an escalator are very high. Escalators have a high capacity for displacing people and can be installed in the same physical staircase space. Escalators do not have time to wait unless they are in heavy traffic. They can also be used to direct people to the main outputs or specific locations of the employer. Covered ones are also available for outdoor use. The number of installed escalators in the United States is estimated at more than 30,000 machines, which can handle 90 billion passengers annually. The escalator and its family, the electric pedestal, provide their driving force by using alternating current motors that create a steady speed. This speed is generally 0.3 to 0.6 m / s. The maximum angle of the escalator is 18 degrees to 30 degrees horizontally.
The invention of a public-use escalator is attributed to a chartered Otis elevator firm, Charles DeSaber. His creature was presented at the 1900 Paris exhibition, which won the first prize. Siberge has developed a word-of-mouth from the combination of the two words ESCALA, which in Latin means stairs, and ELEVATOR, which means lift. In 1910, Seberg handed over his patent to the Otis Elevator Company. Despite the many advances made in the field of completing the invention since its birth, Siberian's early design is still the basis of an escalator. This car consists of two up and down platforms, which are connected by a metal truss. The truss includes two wheel drives that move a folding staircase into a continuous loop. The truss is also equipped with a shield and two bar knobs that move at a fast pace with the speed of the stairs.
Up and Down Platforms
The two platforms include curtain curtain parts, as well as engines, gearboxes and stairs. The above platform includes the propulsion engine and related equipment and the main gearbox of the system. The bottom platform provides wheels and equipment for the return of the stairs to the source. These two pieces also tighten the top and bottom truss. In addition, the platforms are equipped with a tray or fixed plate and a shoulder pad. The tray provides the space required to stand up to the movable stairs before boarding. This tray is level with the finished floor and is usually fitted to be removable and the equipment below is available to installation and maintenance professionals. The shoulder plate is a part that is placed between the platform and the moving stairs. The name implies that the edges of the staircase have shoulders that lie between the edges of the stairs. This design is used to fill the gap between the stationary platform and the stairs and not let objects get stuck in the gap.
Escalator anatomy in plain language
Shoulder board
The truss is a metallic, hollow metal structure that connects the lower and upper part of the escalator. They are made up of two lateral parts, which are tightened by intermediate suppression from the lower to the upright. The two ends of the truss are attached to the lower and upper platforms, and these platforms are connected to the floors with steel fastening or using concrete. The truss also connects the shields up and down to each other.
The guidance system is embedded within the truss to place the chain of stairs that permanently moves the stairs in a circular path. There are two steering wheels in this mechanism. One for the front wheels of the stairs, called stairs, and the other for the rear wheels of the stairs, called the deadly wheel. The relative position of these wheels causes the stairs to be positioned as a staircase along the length of the truss after leaving the lower shoulder plate. Along the length of the truss, these wheels are positioned at a maximum distance, making each step a 90 ° angle to the quill staircase. The doses are up and down the track, these wheels are approaching each other, so that the front and rear wheels of the stairs are placed in an almost continuous stroke. This makes the stairs side by side as flat plates. They can therefore easily be returned to the source during a circular path. The navigators pass the steps from the bottom of the truss to return to the beginning of the path. In this case, the distance between the steering wheels increases and the stair surface becomes again a staircase with a right angle. This cycle constantly repeats itself and leads the steps to the end of the path again to the beginning of the path.
The stairs themselves are solid and integrated in a die casting process made of aluminum. A rubber casing may be drawn onto their surface to reduce the possibility of slipping passengers. A yellow marker line may also be added to indicate the edges of the stairs. The walls of the wall and the floor of the staircase are embedded in a dent in which the dentures are fitted in such a way as to fit with the shoulder padded ivory on the top and bottom of the platform. The stairs are connected by a metal chain in a closed path, so that the body of each step can bend and angle to the adjacent staircase. The front of the stairs


Author: admin
Date: 5-07-2018, 20:00

Elevator Machine Room

The installation of a fire extinguisher capsule in the elevator engine room is indispensable at a convenient and accessible location.
In the engine room, elevators with concrete hollow ceiling above the floor of the engine room are required to create an emergency valve with a useful dimension of at least 0.5 * 0.5 m.
This valve should have a lock open from the engine room with a key and can be opened from the elevator without a key.
Creating a hook on the ceiling of the engine room at the location perpendicular to the center of the concrete roof of the well. The elevator between the two cavities of the tow tower is "with a diameter of at least 18 mm Ø", so that it can withstand the weight of 2000 kg.
In the engine rooms where the way to enter it through the sluice of the engine room of the elevator should be at a time when the valve is open the predictions necessary to prevent the fall of people or objects and therefore install fences at a height of at least 0.8 m around Valve is essential.
The engine room must be ventilated and can protect the motorbike, control panel and other supplies as well as the electric keys in order to protect against harmful dust and soot and moisture.
The remaining air of other parts should not be pulled into the engine room. The engine room must be kept between + 5 ° C and + 40 ° C.
The elevator engine room should be equipped with permanent electrical lighting and at least can provide 200 lux to the floor of the luminaire.
Installing the light switching lens at the entrance and near the point or points of access and at the appropriate height.
To ventilate the engine room, install a ventilator with a capacity of at least 250 CFM.
All wires and cables connected to the elevator equipment that pass through the floor of the engine room must be placed in a channel inside the concrete ceiling, with a minimum depth of 5 cm and a minimum width of 8 cm.
In order to cross the wiring and cables of the lift equipment on the floor of the engine room, the slab should be at least 5 cm deep and the width of at least 8 cm inside the concrete ceiling, based on the type of installation of the motorbike and the governor, and the steering column, under the supervision of the installer of the lift. So that after covering on the floor groove of the machine floor.
In elevators, which are dubbed in a common well, they have to create a valve on the floor of the "Trap door" engine room with a useful dimension of at least 0.8 x 0.8 meters to move and carry the lifting equipment.
When the installation and installation of the elevator is performed by the installer and according to the last standard method and the standard instructions are completed, the maintenance of the maintenance and service after the installation of the lift begins. The role of the elevator technician, as well as the repairer and repairer, is very highlighted during the operation of the lift. In the future, the role of technicians and installers and service groups is to consider lift maintenance in improving the efficiency of the lift.

How to choose and hire these people by vendor and installer and elevator services is especially important. These companies are usually looking for people who have the great potential and experience in the installation and repair of elevators.

(In the past few years, the leading companies such as Iran Shindler Company and ............. have played a major role in the development and training of lift installers, and according to ongoing training programs and specialized training courses both inside and outside the country In the design and calculation section, the installation and control of the project, and ..... have always updated their personnel in education and training (today this responsibility lies with the administrators and educators of the academic education of this industry.)


Author: admin
Date: 5-07-2018, 19:59