Beware of workplace accidents caused by safety shoes

Any accident has its contingency and inevitability. The convenience of co-existence and arbitrariness are all triggers of accidents. At the time when the year was closed, the construction site was changed from the busy past, and the deserted board room was lined with worn-out safety shoes. This pair of shoes was the key moment to prevent accidents or the pair of shoes because of the management staff. And the negligence of users has caused too many accidents and people are caught off guard....

Safety shoes and their performance

The production of shoes is inextricably linked with the natural environment and human intelligence. In ancient times, the land was uneven and the weather was cold and hot. Humans instinctively protected their feet, and shoes appeared. As early as 8000 BC, people in Missouri discovered the remains of Native American shoes.

The shoe has a long history and has undergone improvement and changes. However, the nature of its foot protection is consistent. Wearing suitable shoes in different workplaces can protect the feet and legs from foreseeable injuries.

With the continuous progress of China's shoemaking technology and the continuous development of the global footwear industry, shoes have also been subdivided according to their functions.

First, the impact resistance of Baotou

The impact test shall be carried out with a steel impact hammer of a specified weight. The height of the gap under the head of the bale when impacted by the bale shall be less than the specified value, and there shall be no penetrating cracks in the direction of the test axis. It is worth noting that the specifications of impact hammers in different countries are different in terms of their weight, specifications, impact height, and the structure of the tester. Actual tests should be differentiated.

Second, anti-piercing performance

The test machine is equipped with a pressure plate, and the pressure plate is equipped with a test nail. The test nail is a head with a truncated tip. The hardness of the nail head should be greater than 60HRC. The sole sample is placed on the chassis of the tester. The position allows the test nail to pierce through the outsole. The test nail is pierced through the sole at a rate of 10 mm/min ± 3 mm/min until it penetrates. The greatest force. Each of the soles was tested on four points (at least one of which was in the heel). Each point was not less than 30mm apart and more than 10mm from the edge of the insole. The bottom of the anti-slip block should be pierced between the blocks. Two of the four points should be tested at a distance of 10-15 mm from the edge line of the planting floor. If humidity affects the results, the sole should be immersed in deionized water at 20 °C ± 2 °C for 16 ± 1 h before testing.

Third, anti-static properties

After the shoe is adjusted in a dry and wet atmosphere, a clean steel ball is filled into the shoe and placed on the metal probe device. The predetermined resistance tester is used to measure the first two probes and the third probe. The resistance between. Under normal circumstances, conductive shoes require resistance should not be greater than lOOK ohms; anti-static shoes require resistance should be between 100K ohms and 100M ohms.

Fourth, thermal insulation

Using the shoe as a sample, the thermocouple was installed at the center of the connection area of ​​the inner bottom and the steel ball was filled into the shoe. Adjust the temperature of the sand bath to 150°C and 5°C. Place the shoe on it so that the sand touches the outer sole of the shoe. Use a temperature tester connected to the thermocouple to measure the temperature of the inner sole and the corresponding time. , gives the temperature increase curve. Calculate the temperature increase from 30 minutes after the sample is placed on the sand bath. General insulation shoes require that the temperature increase of the inner bottom surface is less than 22°C.

Fifth, heel performance

The test instrument has a maximum compression load of 6000N and is equipped with a device for recording load/deformation characteristics. Place the heel-like shoe on a steel plate, and place the test punch against the inner bottom on the inner side of the heel portion. The load was applied at a speed of 10 mm/min ± 3 mm/min. Plot the load/compression curve and calculate the absorbed energy, E, in joules.

6. Anti-skid performance This standard specifies the anti-skid coefficient of the tested soles, but the design and specifications of the anti-skid blocks are stipulated, such as the thickness of the sole, the height of the anti-skid block, and the distance from the edge of the sole.

Seven, acid and alkali resistance
Suitable for electroplating workers, pickling workers, electrolysis workers, liquid distributors, chemical operators, etc. Matters needing attention: acid and alkali shoes can only be applied to the general low concentration of acid and alkali workplaces; should avoid contact with high temperatures, sharp shoe uppers or shoe sole leakage; wear after use of water to wash shoes on the acid-base liquid, and then Dry to avoid direct sunlight or drying.

Safety shoes use status

At present, many companies have provided employees with protective safety shoes as required. However, it is understood that although some enterprises provide employees with protective safety shoes, they will no longer be in charge after buying them for a long time and will not be replaced for a long time. In fact, with the development of science and technology and the improvement of working methods, some safety shoes used in the new environment for a long time can not play a very good protective role, safety shoes have been damaged to the point where they can hardly be used, and have not been scrapped in time. Employees do not wear safety shoes when they work, causing great potential safety problems.

Safety shoes are different from other shoes and tools. They are not dispensable or can be dealt with casually. Damaged and scrapped safety shoes not only fail to protect but also give psychological hints to employees who do not understand the situation. Labor protection has been done and there are hidden dangers in thinking. Therefore, in order to avoid hidden dangers and accidents, for the sake of safe production of the company, the employer must promptly replace the special labor protection articles, safety shoes, safety helmets, and safety suits that have been damaged due to the country's requirements and the service life of the products.

The construction site and construction site can be seen everywhere. There are many equipments and objects on the construction site. Carefully and at any time during the walking and working process at the construction site, it can be described as a shocking step by step. For the moment, if there is an accident, we will regret it! Therefore, a pair of qualified safety shoes not only gives us a foot safety protection, but also an important guarantee for safe production!

Copyright Statement: This article is the original article of China Labor Insurance Network. If you need to reprint please indicate the source.