ISO 12643-2:2010 pdf free download – Graphic technology一Safety requirements for graphic technology equipment and systems一 Part 2: Prepress and press equipment and systems.
In the following circumstances, it shall be necessary to press the reset control before movement in the delivery area can be initiated using a separate control:
— after switching on the press at the main switch;
after activating the ESPDs;
when the protective device that safeguards full body access to hazard areas has been tripped.
EXCEPTION — It is not necessary to press the reset control if persons inside the hazard area are safely detected due to the construction of the protective devices (e.g. laser scanners).
Pressing the reset control shall not lead to an automatic start-up of machine motion.
EXCEPTION — Pressing a reset control may initiate motion of both the main pile and auxiliary pile system.
NOTE This is to allow the operator to quickly reset the pile system within the time period allowed before the machine stops.
6.7.2.6 Safeguarding the sheet gripper system
The delivery is considered to be sufficiently safeguarded against full body access to the hazard zone of the sheet gripper system under the following operating states.
a) While the delivery is separated from the drive train using couplings, the coupling action and restart shall not cause any hazardous movements.
b) The opening above the pile carrier or the moved-in auxiliary pile support (e.g. rake, wooden pile board, roller blind) or equivalent device shall be no greater than 160 mm.
c) While the press is delivering material to a raised pile support plate or to an auxiliary pile support (e.g. rake, wooden pile board, roller blind) or equivalent device; and the presence of the pile support in use is detected either at insertion or by the time it has reached 160 mm below the access to the hazard; and the opening above the uppermost pile carrier shall be no greater than 300 mm; and no change of state of the main drive has occurred.
d) While the machine is at a standstill, the use of horizontal light beams, arranged underneath the gripper system in accordance with ISO 13855, shall prevent the start of the machine (see Figure 5). If the existing light curtains do not meet the requirements of ISO 13855, other protective devices shall be provided in accordance with 6.7.2.2. The distance between the individual light beams underneath the gripper system shall not exceed 40 mm.
If none of the above conditions exist, the delivery shall not operate without the presence of additional safeguarding against entry into the hazardous area.
For example, if the pile support has not been detected by the time it has descended to a distance of 160 mm below the access to the hazard, the machine shall either shut down or the hazardous area shall be protected by additional safeguarding, such as light beams, guards, etc.
6.7.2.7 Guarding the area beneath the pile carrier on presses having an access height of 800 mm or more. On presses having an access height to the delivery of 800 mm or more (see 6.7.2.2), access to the area beneath the pile carrier plate and the lowerable auxiliary pile device shall be safeguarded in addition to safeguarding the edge of the pile carrier plate in accordance with ISO 12643-1. This safeguarding shall be achieved using area protection devices with ESPDs or other protective devices in accordance with 6.7.2.3 and 6.7.2.4. The bypass functions as defined in 6.7.2.3.2 also include safeguarding of the area beneath the pile support systems.
The two-beam provisions of ISO 12643-1 may be applied provided there is alternative guarding for the movement of the gripper bars.
Independent movement of the pile carrier without the use of additional guarding defined in 6.7.2.3.1 or 6.7.2.3.2 is also permitted by hold-to-run control if the hazardous area can be viewed from the position of the hold-to-run control.