Tham khảo tài liệu 'inspection of vertical transportation equipment_9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http Fastenings should not come within one inch of the edge of the belt. Handholds should be the closed type to minimize the possibility of fingers rings bracelets and watch bands getting caught in them. Handholds must be capable of withstanding without damage a load of 300 pounds applied parallel to the run of the belt. No handhold can be provided without a corresponding step. If a handhold is removed permanently or temporarily the corresponding step and handhold for the opposite direction of travel must also be removed before the lift is placed in service. Inspect all handholds and report any deficiencies. Stopping Devices Up Limit Stop. Two separate automatic stop devices should be provided to cut off the power and set the machine brake when a loaded step passes the upper terminal landing. One automatic stop device shall consist of a switch mechanically operated by the belt or step roller. The other shall consist of one of the following a. A roller switch placed above and out of line with the first limit switch. b. A photocell and light source electric eye . c. A switch actuated by a lever rod or plate the latter placed above the head pulley so as to just clear a passing step. After the manlift is stopped it shall be necessary to reset the automatic stop manually. The device shall be so located at the top landing that a person resetting it shall have a clear view of both the up and down-runs of the manlift. It shall not be possible to reset the device from any step or platform. The stopping device shall function so that the manlift is stopped before the loaded step has reached a point 24 inches above the top terminal landing. Down Limit Stop. An automatic stop device shall be provided to cut off the power and apply the brake if a loaded step passes the bottom terminal landing. Emergency Stop. An emergency stop means shall be provided. The stop means shall be .
