Automatic safety door grating

Automatic safety door grating

  • CN 201,056,883 Y
  • Filed: 06/12/2007
  • Issued: 05/07/2008
  • Est. Priority Date: 06/12/2007
  • Status: Active Grant
First Claim
Patent Images

1. an automatic safety door hurdle comprises inside door hurdle and external door hurdle, and fixedly door-hinge is established on the external door hurdle, and movable door-hinge is established on the inside door hurdle, and inside and outside door hurdle is connected by last door bolt, following door bolt, it is characterized in that:

  • Fixedly the door-hinge inboard is provided with a groove, and this groove comprises the first side and first hypotenuse, and first angle that this first side and first hypotenuse form is the obtuse angle;

    The movable door-hinge outside is provided with the projection that is meshed with fixing door-hinge inboard groove, and this projection comprises the second side and second hypotenuse, and second angle and first angle that this second side and second hypotenuse form are complementary;

    Has the activity space that moves for movable door-hinge between this groove and projection;

    Fixedly be provided with fixed gate pivot pin groove in the groove of door-hinge, be provided with dodge gate pivot pin groove in the projection of this activity door-hinge;

    Last door bolt is placed in fixed gate pivot pin groove and the dodge gate pivot pin groove.

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