Safety doors are mainly used to prevent the operation of the machine under certain conditions (usually when the guard is not closed) in order to avoid the occurrence of danger as much as possible. If the installation of the safety door switch itself is not compliant, resulting in its interlocking function cannot be realized correctly, "inaction when it is time to act" is obviously what everyone does not want to see. Therefore, the first priority when applying a safety switch is to use it correctly.
Requirements for securing the safety switch
Compliant installation is the premise of ensuring the normal function of the safety switch, and the following will tell you some requirements for fixing the safety switch:
The fastener itself needs to be reliable and stable enough.
It can be removed with specialized tools, such as hexagon screws, star screws, etc. Phillips/slotted screws are not recommended, as in some cases they can be easily opened with fingernails or personal equipment.
Fasteners need to prevent themselves from loosening, and when appropriate, consider the necessity of elastic washers or screw glue.
It is necessary to prevent damage caused by foreseeable external shocks, and to judge the installation location according to the actual situation, such as the water level that is often walked away from people and forklifts often pass.
Mechanical switches need to be carried out within the specified operating range, especially for mechanical deadbolts, the length of which is fixed, if the installation distance is not calculated, it is easy to cause physical damage to the switch if it is often operated.
The safety door switch is not allowed to be used as a mechanical stop and mechanical stop for protection, and it is also to avoid damage to the switch body and operating head, reduce unnecessary physical impact as much as possible, and prevent safety failure and service life reduction
In practical applications, some operators, for the sake of temporary convenience, in the case of safety protection opening, artificially make the safety switch often have signals, such as taking an additional operating head to tie it to the switch body, so that it can not function normally. In order to eliminate potential safety hazards caused by non-standard operations at the operational level, the ISO14119 standard specifically describes "supplementary measures to minimize the possibility of discarding interlocks", which is the anti-shielding measures for safety switches that we often mention.
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