[Tip] What specifications must be met for building construction helmets? Do you know the function of various parts?

Safety helmets must be worn properly at the construction site. Casualty accidents at the construction site, especially when objects are hit and falling out of the accident, show that if the helmet is properly worn, the consequences of the accident will be reduced and avoided; if the helmet is not properly carried, it will lose its protective effect of protecting the head. Causes serious damage to people.

First, specification requirements

Vertical spacing: measured according to the specified conditions, the value should be between 25-50MM.

Horizontal spacing: measured according to the specified conditions, the value should be between 5-20MM.

Wearing height: measured according to the specified conditions, the value should be between 80-90MM.

Hat hoop size: divided into the following three numbers

Trumpet: 51-56CM

Medium:57-60CM

Large: 61-64CM

Weight: A complete helmet, from the information to the understanding that the weight should be reduced as much as possible, should not exceed 400G.

Hat size: minimum 10MM, maximum 35MM. Hatching slope is preferably 20°-60°.

Vents: Vent holes can be provided on both sides of the helmet.

Caps: 10MM minimum, 55MM maximum.

Color: The color of the helmet is generally light or eye-catching colors, such as white, light yellow and so on.

Second, structure and parts function

Shell: Take a blow to separate the falling object from the human body.

Hood: Keep the helmet in a defined position on the head.

Top strap: Disperses the impact force and keeps the cap shell floating so as to disperse the impact force.

Rear hoop: headband locking device.

Lower chin strap: Helps maintain the status and position of the helmet.

Sweatband: Sweat.

Cushion: Reduces impact when an impact occurs.

Wearing height: It reflects the difference in height from the forehead to the head and interferes with the eyes, ears and clothing. The cap of the helmet was removed from the forehead. The tight part cannot be closed, and there is no guarantee that it has a certain state and position on the head.

Vertical spacing: Reflects the gap between the inside of the cap and the top of the head. If it is too small, the ventilation is not smooth, and if it is too large, the center of gravity of the shell increases, causing the helmet to be unstable on the head.

Horizontal spacing: Provides buffer space when there is lateral force at the impact. It is also a cooling channel.