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light gantry crane

Introduce light small gantry crane in used process safety knowledge

single girder gantry crane

In the process of use, the safety of small and medium-sized gantry crane frame is often not in place or not standardized, there are many problems:

  1. Due to improper installation, maintenance, when the hanging blue running in place, controlled by the spring supporting rod can’t reliable dock lever on the rack, Load cannot be borne by stop frame, Lead to the wire rope force, when the operator in and out of the blue hanging, hanging blue will appear greater sway and sink, can not prevent the wire rope suddenly breaking or brake failure of the blue crane hoist fall.
  2. The floor of the building at the discharge port, no protective door, or after the installation is not used, Both sides of the discharge port shall not be provided with protective railing and foot plate according to the protection of the side. In the process of construction into the decoration stage, and even the removal of the protective door, so that the floor of the staff did not side protection, it is not possible to prevent the collision and falling accident of the personnel in the loading and unloading operation.
  3. Light small gantry crane above the ground of the inlet is not set protective shed, if any, the length of the protective casing is much less than the rules and regulations, without setting according to the damage radius, the length of the shortest even less than 1 m, can not effectively prevent the inlet of falling objects, against accidents.
  4. The unloading platform at the discharge port of the floor is not standardized, There is no systematic and structural connection, But connected to the scaffold, The platform is not full of wood, wood is not fixed, even in the platform on the steel template instead of wood, easily lead to the fall of the staff.
  5. When the winch is close to the working area, The installation of protective ceiling of winch can not meet the requirements, Some only laying a layer of asbestos or single layer of bamboo plywood, do not have the ability to fight against objects, can not guarantee the operation of the equipment and the safety of the operator.
  6. The winch is not equipped with a protective railing or protective net on the side of the light and small gantry crane frame. Once the wire rope breaks, it will cause harm to the operator.
  7. Winch wire rope in crossing the road, did not pass the protection, can not avoid rolling and damage, on-site personnel crossing is also extremely unsafe.
  8. Elevated gantry crane hanging blue above the top of the roof is not set, or did not require the laying of 125px thick wood, and some only laying a layer of bamboo plywood. Elevated gantry crane due to long distance running up and down, after more than work floor, if you don’t set protective roof by the requirement, can not prevent workers from the top of the falling objects hit.
  9. The bottom of the gantry crane formation of the channel, the operator can freely from the lower part of the frame, once the basket down or above the falling objects, will bring harm to the operator.
  10. A lot of small gantry crane limit the range (from the highest position and the blue crane beam part of the lowest) were less than 3m, not up to standard requirements, in case of accidents (such as mechanism, electrical fault) electromagnetic cannot disconnect when the driver does not have enough time to use the emergency power switch off the power will lead to the basket and beam collision.
  11. The overhead gantry crane frame shall not be equipped with overload limiter. When the load exceeds the rated load, the lifting power can not be cut off.
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