Mechanical injury accident analysis question [Daily Question 20090318]

1. **Someone ordered that the protective cover over the pulley be removed (although people might do this anyway, but there’s a difference between those with experience and those without it, as well as those who have received safety training or not).** 2. While **and the others were focused on adjusting the equipment, Zhao Feng went over to the start button and said, “Get up – let’s try starting it.” And so the equipment was started (it’s clear that there was no sense of safety at all; if one only knows a little about technology, they shouldn’t touch the equipment, even if they can just give instructions from the side).** 3. The young technicians, as arranged by the factory manager, were tasked with leading four workers from the mold-making team in designing and manufacturing a device for bending hanging mailboxes. There’s something wrong with such arrangements by management; young technicians should first consider the issue of experience. Under the pretense of giving them a chance to gain experience, if anything goes wrong, the management will blame others. In fact, it’s the management who really need to receive safety training

I. Unsafe behaviors include: 1. Installing equipment is carried out by inexperienced young technicians； 2. The protective cover of the pulley was removed ； 3. There is no unified commander for on-site debugging ； 4. Starting the machine without permission ； 5. Use hands instead of tools to operate ； 6. No safety devices ； II. Hazardous factors: mechanical injuries, electric shock. III. Measures: 1. Choose safety protection devices with a rational structural design and layout, ensure reliable installation, and make them difficult to remove ； 2. Select experienced personnel to carry out the operations under unified command ； 3. Use tools during debugging ； 4. Use a unified signal for starting and stopping the machine ； 5. The machine runs at low speed during debugging ； 6. Conduct safety training before debugging ； 7. Establish safety procedures and operating protocols before debugging ； That's all.

When commissioning rotating equipment, the power supply should be disconnected and a “Do Not Close” sign should be placed

I. Unsafe behaviors include: 1. Installing equipment is carried out by inexperienced young technicians； 2. The protective cover of the pulley was removed ； 3. There is no unified commander for on-site debugging ； 4. Starting the machine without permission ； 5. Use hands instead of tools to operate ； 6. No safety devices ； II. Hazardous factors: mechanical injuries, electric shock. III. Measures: 1. Choose safety protection devices with a rational structural design and layout, ensure reliable installation, and make them difficult to remove ； 2. Select experienced personnel to carry out the operations under unified command ； 3. Use tools during debugging ； 4. Use a unified signal for starting and stopping the machine ； 5. The machine runs at low speed during debugging ； 6. Conduct safety training before debugging ； 7. Establish safety procedures and operating protocols before debugging ；

During debugging, the power supply should be disconnected. And it is equipped with a warning sign indicating that closing is prohibited. When closing is required, install the guard; after confirming that the site meets safety conditions, follow the procedures outlined in the work order, with power supply personnel carrying out the operation.

I. Unsafe aspects include: ； 1. The protective cover of the pulley was removed ； ； 2. Starting the machine without permission ； 3 ； Hazardous factors: mechanical injuries, electric shocks, etc. Measures: 1. Choose safety protection devices with a reasonable structural design and layout; 2. Use tools during debugging ； 4. Use a unified signal for starting and stopping the machine ； 5. The machine runs at low speed during debugging ； 6. Conduct safety training before debugging ； 7. Establish safety procedures and operating protocols before debugging ；

I. Unsafe behaviors include: 1. Installing equipment is carried out by inexperienced young technicians； 2. The protective cover of the pulley was removed ； 3. There is no unified commander for on-site debugging ； 4. Starting the machine without permission ； 5. Use hands instead of tools to operate ； 6. No safety devices ； II. Hazardous factors: mechanical injuries, electric shock. III. Measures: 1. Choose safety protection devices with a rational structural design and layout, ensure reliable installation, and make them difficult to remove ； 2. Select experienced personnel to carry out the operations under unified command ； 3. Use tools during debugging ； 4. Use a unified signal for starting and stopping the machine ； 5. The machine runs at low speed during debugging ； 6. Conduct safety training before debugging ； 7. Establish safety procedures and operating protocols before debugging.

Human factors that cause distress and lead to unsafe behavior: 1. Operational errors, neglect of safety measures, ignoring warnings; 2. Rendering safety devices ineffective; 3. Using unsafe equipment; 4. Replacing tools with inappropriate ones; 5. Entering dangerous areas recklessly; 6. Performing adjustments while machines are in use. Unsafe conditions of objects: 1. Defects in protective devices and safety signals; 2. Defects in equipment and facilities; 3. Lack or defects in personal protective equipment. Identification of hazards at work: 1. Shock and impacts; 2. Electric shocks. Measures to take: 1. Shutting down the power supply; 2. Ensuring that safety devices are functional and effective; 3. Providing training; 4. Implementing unified command

The answer on floor 10 is completely correct; it’s the same as my answer.
I. Human factors that lead to unsafe behavior: 1. Operational errors, neglecting safety measures, ignoring warnings; 2. Causing safety devices to fail; 3. Using unsafe equipment; 4. Replacing tools with inappropriate ones; 5. Entering dangerous areas recklessly; 6. Making adjustments while machines are in use.
II. Unsafe conditions of objects: 1. Defects in protective and safety-related devices; 2. Defects in equipment and facilities; 3. Lack or defects in personal protective equipment.
III. Identification of hazards at work: 1. Shock and impacts; 2. Electric shock.
Measures to take: 1. Shut down the power supply; 2. Ensure that safety devices are functional and effective; 3. Provide training; 4. Have unified command

I. Unsafe behaviors: 1. Failing to conduct safety checks before starting work. 2. There is no unified command. II. Hazardous factors: Mechanical injuries, electric shock. III. Measures: 1. Conduct safety training first. 2 Safety checks were not carried out before starting work. 3 Strictly follow the operating procedures. 4 Unified on-site command.

Unsafe human behaviors include: 1. Operational errors and neglect of safety measures; 2. Removal of the protective cover on the pulley, which results in the failure of safety devices； 3. Perform adjustments and other tasks during the machine’s transportation and installation ； 4. Lack of unified command during operations, resulting in machines being started without permission ； 5. Use hands instead of tools to operate ； The unsafe conditions of objects include: 1. Defects in devices such as protective and safety signals; 2. Defects in equipment and facilities. Identification of hazardous factors: mechanical injuries, electric shock. Measures to prevent accidents: 1. Use appropriate safety protection devices ； 2. Select experienced personnel to carry out the operations under unified command ； 3. Establish safety measures before debugging ； 4. Conduct safety education and safety briefings before proceeding with on-site commissioning ； 5. When debugging rotating equipment, the power supply should be disconnected, and a “Do Not Close” sign should be placed. This post was last edited by wanmh on 2009-3-18 20:01]

First, I would like to make a statement: this accident was the first one I encountered in my work in safety. A young student became disabled as a result. You should know that the thumb of the right hand – the dominant hand – has a function equivalent to half of an entire hand; the disability resulting from this work-related injury is classified as grade six (since the fingers could not be reattached, almost all of them were amputated). According to the standards for people with disabilities, this qualifies him as such. It’s truly heartbreaking! This answer is primarily based on the \"Classification Standards for Work-related Injuries and Deaths of Enterprise Employees\" (GB6441‑86) and GB6442-86 \"Rules for the Investigation and Analysis of Work-related Injuries and Deaths of Enterprise Employees\", for your reference! I don’t dare claim it’s the correct answer! It seems that the participants weren’t interested in these questions this time; it’s likely that we’ve set a new record for the lowest number of answers! 1. Please identify what unsafe behaviors and unsafe conditions existed in the above accident Answer: Unsafe conditions include: the guard being in the wrong position ； Unsafe behaviors include: starting the machine without permission; removing safety devices ； Using equipment without safety devices ； Hand enters a dangerous area ； There is no warning sign stating “Personnel are working; do not close the switch” hung at the power source. Answer: There are hazards such as mechanical injuries and electric shocks in this type of work ； Preventive measures: 1) Management aspects: Identify a project leader to ensure unified organization and command. Prevent chaos and disorder among people ； 2) Conduct hazard identification and establish preventive measures: Electric shock hazard—check the condition of insulation, grounding, and shielding to ensure they are in good condition ； Mechanical injuries — Ensure that the safety devices are in good condition. When it is necessary to perform manual adjustments and remove the protective covers, the power supply must be reliably disconnected, and a warning sign stating “Personnel are working; do not turn on the power” should be placed at the power source to prevent the equipment from starting up accidentally.