Fire Bolt Assembly for a Door

摘要

A fire bolt assembly (10) includes a receiving tube (117) mounted in a door (106). A mounting member (32) is mounted to the receiving tube (117). A positioning bolt (151) is received in the receiving tube (117). A stop member (58) is securely mounted in the mounting member (32) to hold the positioning bolt (151) in the receiving tube (117). The front end (153) of the positioning bolt (151) is moved out of the receiving tube (117) by a spring (100) to engage with a coupling hole (116) in another door (112) or a door frame when the stop member (58) melts due to the heat of a fire, locking the door (106) in place during the fire. A stick (175) in the receiving tube (117) is moved to a blocking position preventing the front end (153) of the positioning bolt (151) from disengaging from the coupling hole (116).

主权项

1. A fire bolt assembly for a door comprising:
a receiving tube (117) adapted to be mounted in a door (106), with the receiving tube (117) including front and rear ends (119, 131) spaced along a first axis, with the receiving tube (117) further including a receiving space (133) extending along the first axis through an end face of the front end (119) of the receiving tube (117); a mounting member (32) fixed to the front end (119) of the receiving tube (117), with the mounting member (32) including an axial hole (46) in communication with the receiving space (133) of the receiving tube (117), with the mounting member (32) adapted to be fixed on an end face (108) of the door (106); a positioning bolt (151) received in the receiving space (133) of the receiving tube (117), with the positioning bolt (151) including front and rear ends (153, 155) spaced along the first axis, with the positioning bolt (151) further including a receptacle (171) defined in the rear end (155) of the positioning bolt (151); a spring (100) received in the receiving space (133) of the receiving tube (117), with the spring (100) biasing the front end (153) of the positioning bolt (151) to an extended position outside of the receiving space (133) of the receiving tube (117); a stick (175) received in the receiving space (133) of the receiving tube (117), with the stick (175) including an abutment end (177); and a stop member (58) securely mounted in the axial hole (46) of the mounting member (32), with the stop member (58) made of a material having a melting point lower than melting points of the receiving tube (117), the mounting member (32), the positioning bolt (151), the spring (100), and the stick (175), with the stop member (58) holding the positioning bolt (151) in a retracted position in the receiving space (133) of the receiving tube (117), with the abutment end (177) received in the receptacle (171) of the positioning bolt (151), with the spring (100) moving the front end (153) of the positioning bolt (151) out of the front end (119) of the receiving tube (117) when the stop member (58) melts, with the abutment end (177) of the stick (175) disengaged from the receptacle (171) of the positioning bolt (151) and moved to a blocking position preventing the positioning bolt (151) from moving from the extended position to the retracted position.