Blanche fuji's Album: Elevator Manufacturers Analyze Common

In order to prevent the passenger elevator door from gripping the passenger during the closing process, a safety touch panel (or photoelectric or light curtain) is generally installed on the elevator car door. Safety touch panel: It is a mechanical anti-pinch device. When the elevator touches the door, when the person touches the safety touch panel, the safety touch panel is inwardly retracted, driving a lower micro switch, the safety touch panel switch action, and controlling The door turns in the direction of opening the door. Let's talk about the elevator light curtain repair skills with the fuji Elevator Manufacturers . First, the elevator light curtain is closed, it is a malfunction - no closing The elevator light curtain is a closed loop protection system. When the infrared beam detection circuit is interrupted, the elevator door will not close. An abnormal interruption of the infrared beam detection loop may be due to the following hardware failure: 1. The spot is blocked by foreign objects – Foreign objects on the infrared light path of the light curtain (such as baggage tags, paint stains, chewing gum, etc.) should be inspected and removed. In such cases, it is only necessary to clear the foreign matter on the light path to resume operation. 2, the light curtain is used for a long time, or used in dusty and humid environment (especially during the interior decoration of the building), there will be dust on the infrared emitting/receiving light pipe, the dust needs to be cleaned, and the elevator door can be restored to normal. 3. Light spot damage – Due to continuous scanning, the infrared light-emitting tube is repeatedly subjected to current excitation, which is a relatively easy to damage device. The infrared emission tube is damaged and should be replaced. Second, the elevator light curtain closed is a malfunction - close the door 1. During the process of closing the elevator door, a certain beam scan of the infrared light curtain is not received, or the receiving intensity does not reach the set value, the system will trigger and the elevator door will be reversed. If this is not caused by the object blocking, it is the malfunction of the infrared light curtain. Damage to the core of the elevator will cause system malfunction at a certain position. 2. Infrared light curtain emission/reception conditions are the main reason for the malfunction of the infrared light curtain closing process. The intensity of an infrared light-emitting tube is low, or the quality is unstable, or due to dust, etc., it may cause malfunction during the closing process. Third, the elevator light curtain does not move Infrared light curtains, although blocked in the process of closing the elevator, do not trigger, posing a danger. This is usually caused by the following reasons: 1. Infrared light curtain scanning harness density is not enough, or scanning mode causes scanning blind zone 2. Infrared sensitivity is not enough. The infrared light curtain should have the maximum emission intensity when the elevator door is fully open. As the elevator door closes, the infrared emission intensity should be reduced step by step (each stage is reduced to just be received by the receiver, does not cause the infrared light curtain to malfunction as the lower limit), and is lowest when the door is completely closed. Otherwise, at a relatively close position, the infrared intensity is too large, and the tiny objects cannot be blocked, and although it is blocked, it does not operate. 3. Infrared light of similar wavelength in sunlight or elevator background stray light is irradiated to the infrared receiver, causing the infrared light curtain to emit a normal receiving signal even though there is object blocking. This is especially common in sightseeing elevators and outdoor elevator applications. information about Elevator Manufacturers :