"Metro Elevator Cry" sounds the alarm for the quality and safety of fastener industry

The elevator accident occurred frequently. On the morning of July 5th, at the Beijing Subway Line 4 Zoo Station, retrograde elevators suddenly reversed equipment failures, and some of the passengers who were taking the elevator fell down, killing one person and injuring 30 others. The Beijing Municipal Bureau of Quality Supervision announced preliminary investigation results. The direct cause of the accident was "due to the damage of fixed parts, the escalator drives the main engine to displace, causing the drive chain to fall off and the escalator to slide."

At about 7:20 pm on July 7th, the lift of the Hanzhongmen station on the Nanjing Metro Line 2 went down, and it took 4 passengers to sleep for 30 minutes.

In the afternoon of July 10th, in the Nanjing Andemen station of Metro Line 1, passengers felt that “the escalator was suddenly retrograde” and five passengers fell. Regarding what the passengers said about the retrograde of the elevator, the Nanjing Subway Operating Company gave a negative opinion that the elevator was operating normally and was not retrograde.

On the evening of July 10, there was another serious elevator accident in the country: After the escalator at Qinghu Station on the Shenzhen Metro Line 4 operated by the MTR went to 1/3 of the way, it suddenly stopped and reversed, and the passengers were unable to fall off and caused four injuries.

On July 11, the elevator of Caoyang Road Station of Shanghai Metro Line 3 suddenly stopped working during the operation...

Since the Beijing Metro elevator accident was noticed, the elevator accident in the recent media reports suddenly felt a lot more. In fact, domestic elevator accidents have been frequent in recent years, but they have not attracted attention. In the case of accidents such as the sudden escalator escalation, many accidents will occur every year. On December 14 last year, an accident occurred at Shenzhen Guomao station. The elevator was also retrograde, causing 25 passengers to be injured. The cause of the accident announced at that time was almost the same as the cause of the accident in Beijing. “The main shaft of the escalator has been loosened. One of the escalators has been cut off, causing the main support to displace, causing the drive chain to disengage from the sprocket, and the escalator on the escalator. Under the influence of the decline."

Fastener "not fastened"

Fasteners are also referred to as standard parts in the market, and are a general term for a type of mechanical parts used when two or more parts (or components) are fastened and connected to one another. It is characterized by a wide variety of specifications, different performance and uses, and a high degree of standardization, serialization, and generalization. Fasteners are the most widely used mechanical basic parts and they are in great demand.

Not only is the elevator escalator product failing, but fasteners that are not fastened are common. Recently, a folding baby stroller exported from a company in Ningbo to the United Kingdom was notified by the European Union RAPEX. The reason was that the bolts loosen and fell off the cross beams of fixed carts caused the collapse of the cart during use.

Although every accident has two main and objective reasons, the high probability factor of loose bolts is enough to cause widespread concern for fastener companies.

The fastener industry needs to improve the quality of fasteners, and the quality control is more complicated. Internationally, there are English, German, and American systems. China's fasteners lack a unified standard. Some fastener companies adopt imperial standards, some fastener companies use German standards, and some fastener companies adopt American standards, causing chaos in the fastener market.

At the same time, the price war made some Chinese fastener companies simply pursue price competition and neglected the quality of the products. This undoubtedly brought certain vicious competition to China's fastener companies. Suffered from anti-dumping abroad. While foreign fastener companies have very strict quality control procedures for quality, all aspects of quality requirements are very standardized.

China's fastener manufacturing is still a lot worse, it needs long-term continuous improvement, attention to improve the quality of products, eliminate backward fastener companies, adjust the industrial structure, promote industrial upgrading, in order to establish a good Word of mouth.