초록 ▼

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 positioni

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).

대표청구항 ▼

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 f

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); anda 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. 2. The fire bolt assembly as claimed in claim 1, with the receptacle (171) extending from the rear end (155) through the front end (153) of the positioning bolt (151), with a pin (139) received in the rear end (131) of the receiving tube (117) and extending perpendicularly to the first axis, with the spring (100) compressed between the rear end (155) of the positioning bolt (151) and the pin (139) when the positioning bolt (151) in the retracted position, with the stick (175) including a pivotal end (179) pivotably connected to the pin (139), with the stick (175) pivoting to the blocking position after disengaging from the receptacle (171) of the positioning bolt (151) when the stop member (58) melts. 3. The fire bolt assembly as claimed in claim 1, with the front end (153) of the positioning bolt (151) including an abutting periphery (157), with the abutting periphery (157) being conical, with the mounting member (32) including a sleeve (42) received in the receiving space (133) of the receiving tube (117), with the axial hole (46) extending through the sleeve (42), with the sleeve (42) including first and second coupling faces (56) spaced along a second axis perpendicular to the first axis,with the stop member (58) including a stop plate (60) having front and rear surfaces (62, 64) spaced along the first axis, with the stop member (58) further including first and second legs (66) spaced along the second axis and each protruding from the rear surface (64) and extending away from the front surface (62) of the stop plate (60) along the first axis, with each of the first and second legs (66) extending into the axial hole (46) of the mounting member (32), with each of the first and second legs (66) including a connecting end (76) interconnected to the rear surface (64) of the stop plate (60) and a free end (78) distant to the rear surface (64) of the stop plate (60), with the free end (78) spaced from the connecting end (76) along the first axis, with each of the first and second legs (66) further including outer and inner side faces (68, 70) spaced along the second axis, with the inner side faces (70) of the first and second legs (66) facing each other, with a spacing perpendicular to the first axis between the inner side faces (70) of the connecting ends (76) of the first and second legs (66) being smaller than that between the inner side faces (70) of the free ends (78) of the first and second legs (66),with a hook (80) formed on the outer side face (68) of the free end (78) of each of the first and second legs (66) and including an engaging face (82) extending in a third axis perpendicular to the first and second axes, with the engaging face (82) of each hook (80) engaging with one of the first and second coupling faces (56) of the sleeve (42) of the mounting member (32), andwith the abutting periphery (157) of the positioning bolt (151) being biased by the spring (100) and pressing against the inner side faces (70) of the first and second legs (66) of the stop member (58), preventing the stop member (58) from disengaging from the mounting member (32).