Mitsubishi ST-D Series SP-D Series Instruction Manual page 2

Safety Precautions That Must Be Observed
■ The following table explains the types of hazards and their degree of
seriousness associated with incorrect operation or handling.
Indicates a situation of immediate danger that may result in death or
! Danger
serious injury if not avoided.
Indicates a dangerous situation that may result in death or serious injury
! Warning
if not avoided.
Indicates a dangerous situation that may result in minor or moderate
! Caution
injury or in only a property loss if not avoided.
1. Safety precautions for handling in general
!
●
Control the duration of the product life. Totally overhaul the product or replace it with a new one before reaching the end
of the life.
●
Do not allow anyone to operate the crane if he or she does not fully understand the contents of the instruction manual or
the meaning of the warning signs.
●
Anyone without the required regulatory qualification must not operate the crane or arrange slings to lift a load. Do not
allow such a person to do the same.
!
●
Be sure to check the crane and associated items before starting the work. Be sure to carry out the periodical voluntary
inspections.
! ● Keep the instruction manual until the product is no longer used. Make the instruction manual available in a place for ready
perusal at any time.
2. Installation and mounting
!
●
Be sure to provide both ends of the rails of the cross and longitudinal travel tracks with stoppers.
●
Check that the structure where the crane is to be installed has the required strength.
●
Make absolutely sure that only a specialized subcontractor or persons with the expert knowledge are allowed to install the
!
crane.
●
Install the crane only in an environment of the specified conditions. Avoid rain or water that the crane is not designed for.
●
Be sure to ground the crane. In addition to the grounding, provide the electrical circuit with a ground fault circuit breaker.
3. Operation
●
Check that the brake device operates normally before starting to use. Do not operate the crane if the brake device does not
operate normally.
●
Do not operate the crane if the crane is damaged or if it generates abnormal noise or vibration.
●
Never operate the crane if the wire rope has any of the following defects.
⋅ The wire rope is kinked, deformed or corroded.
⋅ If more strands than specified are broken or worn out.
●
Do not attempt arc welding to the suspended load.
●
Do not connect the ground cable of an arc welding machine to the wire rope.
●
Never let the electrode of an arc welding machine come in contact with the wire rope.
●
Never operate the crane if the sling device stopper on the hook is broken or damaged.
●
Do not let the crane main body or the current collector (trolley) run into the stopper or the building structure.
●
Do not operate the crane if the wire rope is not wound on the wire drum normally.
●
Stop operating the crane immediately if the crane operates in the different direction from the intended pushbutton
instruction.
⋅ The crane operates incorrectly or abnormally, possibly causing an injury.
!
If you have to press any of the pushbuttons harder than usual, the particular pushbutton switch may be broken. Stop
operating the crane. Disassemble the pushbutton switch for inspection.
●
If an earthquake occurs while operating the crane, immediately lower the load on the floor and turn off the crane power.
Danger
!
Warning
!
! Caution
Danger
!
Warning
!
! Danger
■ Explanation on symbols
Prohibition
(Things you must not do or attempt by
all means.)
!
Instruction
(Things you must do by all means.)
Be absolutely sure to ground
the crane.