With the development of society, buildings and roads are the cornerstone of the development of human society. People will choose to lay waterproof materials during waterproof maintenance, but people face some problems when laying waterproof materials. When laying waterproof materials, people inadvertently trample on the materials because they do not know that the materials have been laid, resulting in uneven laying of materials and economic losses.
Therefore, we need to protect the sites under construction and just completed construction when laying. Many of the existing protective devices are large, which is not conducive to people’s carrying, and the protective devices can’t be seen by people at night, causing people’s damage. The laying of water-proof materials is wasted, and the placement of protective devices is unbalanced, causing collapse and damage to people.
The protective device comprises two expansion columns 1, a contraction device 21, a second fixing block 4 and two expansion columns 1, one of which is provided with a contraction device 21. The retracting device 21 is composed of two rotating discs 12, the first fixed column 13 and the สปริงไฟฟ้า 14. The rotating disc 12 is installed in the telescopic rod 1.
The protective device makes the shrinking device work by pulling the connecting belt to lengthen or shrink the length of the connecting belt. The shrinking device is composed of two rotating discs and the first fixed column is composed of scroll spring. When pulling the connecting belt, the scroll spring is tensioned by force. When pulling the connecting belt to a suitable position, the fixing device at the edge of the groove fixes the connecting belt. When using it, loosen the fixing device, and the scroll spring does not recover under force to drive the connecting belt to store, The shrinking device is conducive to shortening the connecting belt and helping people get the appropriate length of the connecting belt they want when using it.
Turn the stop block on the second fixed column, align the gap on the stop with the support column, pull out the support column, and three support columns are supported on the ground. The three support columns are conducive to the stability of the equipment, and the support column can also be used on the uneven bottom surface, effectively enhancing the stability of the equipment so that the equipment will not fall and cause harm to people. The surface of the connecting belt is equipped with a luminous belt, which is conducive to the use in the environment with unclear vision.
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