CN218206448U - Prevent fire door with two-way locking structure - Google Patents

Prevent fire door with two-way locking structure Download PDF

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Publication number
CN218206448U
CN218206448U CN202121831983.5U CN202121831983U CN218206448U CN 218206448 U CN218206448 U CN 218206448U CN 202121831983 U CN202121831983 U CN 202121831983U CN 218206448 U CN218206448 U CN 218206448U
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China
Prior art keywords
door
fire door
groove
fire
locking structure
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CN202121831983.5U
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Chinese (zh)
Inventor
花光坤
刘子龙
张高
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Dingdang Industrial Technology Shenzhen Co ltd
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Dingdang Industrial Technology Shenzhen Co ltd
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Abstract

The utility model discloses a prevent fire door with two-way locking structure, including frame main part and door body mechanism, the inside movable mounting of frame main part has door body mechanism, door body mechanism prevents fire door, left gyro wheel, T shape round pin, bearing, sector gear, telescopic link, door-hinge, swing gear, the fire door is prevented on the right side and right gyro wheel including a left side. The problem of one side that the current fire door that prevents that sets up fire prevention hinge can only be opened through the mode that pulls open, and the both sides of preventing fire door all have the possibility of taking place the conflagration, in case there is debris to block up in fire control passageway that prevents fire door place in addition, can open for preventing fire door and bring very big inconvenient technical problem that causes life danger, provide one kind and be equipped with the fire door of two-way locking structure, be convenient for keep opening when preventing fire door idle state, can closely prevent the intensity of a fire from stretching rapidly when taking place the condition of a fire, in addition the utility model provides a novel prevent that fire door requires not much to the area in place, be fit for using widely in the community of low stall area.

Description

Prevent fire door with two-way locking structure
Technical Field
The utility model relates to a prevent fire door technical field, specifically be a prevent fire door with two-way locking structure.
Background
According to the relevant building standards, the door installed in public places or building buildings must have a fire-proof function to block the fire between floors or between intervals when a fire occurs, so as to prevent the smoke poison from spreading rapidly; fire doors are increasingly adopted by the existing family residents for ensuring the safety.
Present fire door equipment prevents that fire door equipment, common problem have: present prevent fire door because the setting of fire prevention hinge, its one side that deviates from fire prevention hinge can only be opened through the mode that pushes away, and its one side that sets up fire prevention hinge can only be opened through the mode that pulls open, and prevent that fire door's both sides all have the possibility of taking place the conflagration, is unfavorable for the person of fleing from the scene of a fire fast when preventing above-mentioned one side that prevents fire door set up fire prevention hinge and breaks out the conflagration, in case there is debris to block up in fire control passageway that prevents fire door place in addition, can open for preventing fire door and bring very big inconvenience and cause life danger.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prevent fire door with two-way locking structure, in order to solve the current prevent fire door that proposes in the above-mentioned background art because the setting of fire prevention hinge, its one side that deviates from fire prevention hinge can only be opened through the mode of pushing open, its one side that sets up fire prevention hinge can only be opened through the mode of pulling open, and prevent the possibility of conflagration breaing out in the both sides of fire door, be unfavorable for the person of escaping from the scene of fire fast when preventing fire door sets up one side of fire prevention hinge and conflagration, in addition in case there is debris to block up in the fire control passageway that prevents fire door and locate, can open the user demand problem who brings very big inconvenience and cause life danger for preventing fire door.
In order to achieve the above purpose, the utility model provides a following technical scheme: including frame main part and door body mechanism, the inside movable mounting of frame main part has door body mechanism, door body mechanism prevents fire door, left gyro wheel, T shape round pin, bearing, sector gear, telescopic link, door-hinge, swing gear, the right side and prevents fire door and right gyro wheel including a left side, prevent fire door bottom rotation on a left side and install left gyro wheel, and prevent fire door right-hand member face-to-face on a left side and install T shape round pin, T shape round pin left side mid-mounting has the bearing, and bearing bottom cover is equipped with sector gear, the telescopic link is installed to T shape round pin both sides, and T shape round pin right side installs the door-hinge, swing gear is installed to the door-hinge bottom, and swing gear back installs the right side and prevents fire door, the fire door bottom is prevented on the right side and rotates and installs right gyro wheel.
Preferably, the T-shaped pin is rotatably installed on the end face of the right side of the left fireproof door through a bearing, the sector gear and the bearing are coaxially connected, and the telescopic rods are symmetrically installed on the end faces of the left side and the right side of the T-shaped pin.
Preferably, the door shaft is coaxially connected with the rotary gear, the external tooth profile of the rotary gear is meshed with the sector gear, and the right fireproof door is rotatably installed at the right end of the T-shaped pin through the door shaft.
Preferably, the frame main part includes ground, wall, door pocket and arc groove, ground left side fixed mounting has the wall, and ground right side fixed mounting has the door pocket, the arc groove has been seted up on the left of the ground, and left gyro wheel movable mounting is in the arc groove.
Preferably, the frame main part still includes vertical locked groove, switching groove and horizontal locked groove, both ends intercommunication has vertical locked groove about the circular arc groove, and vertical locked groove parallel arrangement is inboard in the wall, switching groove has been seted up to ground middle part symmetry, and right gyro wheel movable mounting in switching groove, switching groove right side terminal surface intercommunication has the horizontal locked groove of perpendicular to wall, and inside the horizontal locked groove agrees with the door pocket.
Preferably, the inboard movable mounting of wall has locking mechanism, locking mechanism includes hinge seat, arm lock and roller, the welding of hinge seat middle part has the arm lock, and hinge seat fixed mounting is inboard in the wall, the inside movable mounting of arm lock has two rollers.
Preferably, locking mechanism still includes the returning face plate, turns to groove, extension groove and connecting plate, the inside rotation of arm lock installs the returning face plate, and the returning face plate openly sets up the groove that turns to of arc structure, turn to the groove middle part, the extension groove that has the level orientation is all seted up to right part and bottom, the connecting plate is installed to the returning face plate bottom, and the returning face plate is connected with the left side fire door body through the connecting plate.
Compared with the prior art, the beneficial effects of the utility model are that: the current fire door of solution is because the setting of fire prevention hinge, its one side that deviates from fire prevention hinge can only be opened through the mode that pushes open, its one side that sets up fire prevention hinge can only be opened through the mode that pulls open, and the both sides of preventing fire door all have the possibility of taking place the conflagration, be unfavorable for the person of fleing from the scene of the fire when preventing the one side that fire door set up fire prevention hinge and taking place the conflagration fast, in case in addition there is debris to block up in the fire control passageway that prevents fire door place, can open for preventing fire door and bring very big inconvenient technical problem that causes life danger, provide one kind and be equipped with the fire door of two-way locking structure, be convenient for keep opening when preventing the idle state of fire door, can closely prevent the intensity of a fire rapidly and stretch when taking place the condition of a fire, in addition the utility model provides a fire door does not have a big demand to the area in place, be fit for using widely in the community of low stall area.
1. The utility model discloses a setting of frame main part, through the setting of frame main part, in the limited space between wall and door pocket, reduce the door body mechanism and open and close required area, avoid causing the door body to be unable to open because of debris jam, cause the potential safety hazard, in addition the setup of ground circular arc groove and switching groove provides the direction for the folding of left side fire door and right side fire door is opened, the setup of vertical locked groove and horizontal locked groove is convenient for keep opening when door body mechanism is idle, can prevent the intensity of a fire from spreading rapidly when taking place the condition of a fire for airtight door body mechanism, be fit for using widely in the community of low public stand area;
2. the utility model discloses a setting of door body mechanism, the user pulls or promotes the fire door of right side through the handle of installation on the fire door of right side, fire door bottom right gyro wheel is located the switching groove slip that the ground middle part symmetry was seted up, fire door of right side takes place the rotatory folding in-process, fire door of right side drives the rotary gear through the door-hinge of left side terminal surface and takes place to rotate, under the meshing effect of rotary gear and the coaxial sector gear of bearing bottom, the left gyro wheel of fire door bottom installation of left side is located the circular arc inslot internal rotation that the ground left side was seted up, folding stroke following fire door of right side is rotatory to be accomodate, fire door of left side and fire door are connected through the T shape round pin, guarantee fire door of left side and fire door and right side can be with the synchronous folding of preset orbit, this time T shape round pin left and right sides terminal surface is connected with the wall through the telescopic link in fire door's rotatory stroke of accomodating, play the effect of direction and auxiliary stay, make the person of escaping when taking place the conflagration idle condition can both pull or promote and can both to open fire door and can open fire door and close fast through the setting up the setting of door body mechanism, and can's the setting up the required area when the door of folding and can not causing the door of left side to open the hidden danger of left side and fire door of left side to reduce the left side fire door of left side and fire door of the setting of the structure of folding accomodating, avoid opening because of the door body mechanism, and can's blockage to cause the safe and can's the door body structure setting of the open;
3. the utility model discloses a setting of locking mechanism, prevent fire door and right side at the left side and be in when idle state need keep normally open, the user prevents fire door through the left side that promotes fold condition, it is located the motion locking that the extension groove was located to realize that left gyro wheel is located vertical locked groove in the motion of roller, prevent fire door and the right side under idle state at this moment and prevent the parallel locking of fire door keeping with the wall, keep normally open, when taking place idle condition and need close left side and prevent fire door, the operation procedure of telling door body mechanism in the reversal, the hinge mount is installed perpendicularly in the wall inboardly, returning face plate movable mounting is in the positive welded arm lock of hinge mount, in the rotatory stroke of opening of the left side that is prevented fire door attached to the returning face plate bottom, the roller of arm lock internal rotation installation is located the turning to the inslot motion that openly sets up of returning face plate, when preventing fire door and right side perpendicular to the wall, the roller moves to turning to the groove end just, the user is through the handle of pulling right side of preventing fire door at this moment, make right side bottom right gyro wheel be located switching groove horizontal symmetry axle department horizontal migration, make the airtight door mechanism of preventing fire door of right side bottom, make the roller extend the inslot deep-extending inslot, prevent fire door from stretching naturally, prevent fire door from stretching.
Drawings
FIG. 1 is a schematic top view of the frame body of the present invention;
FIG. 2 is a schematic view of the top view structure of the door mechanism of the present invention;
fig. 3 is the front view structure diagram of the locking mechanism of the present invention.
In the figure: 1. a frame main body; 101. a ground surface; 102. a wall surface; 103. a door pocket; 104. an arc groove; 105. a vertical lock groove; 106. switching a slot; 107. a horizontal locking groove; 2. a door body mechanism; 201. a left fire door; 202. a left roller; 203. a T-shaped pin; 204. a bearing; 205. a sector gear; 206. a telescopic rod; 207. a door shaft; 208. a rotating gear; 209. a right fire door; 210. a right roller; 3. a locking mechanism; 301. a hinge mount; 302. clamping arms; 303. a roller; 304. a turnover plate; 305. a steering groove; 306. an extension groove; 307. a connecting plate.
Detailed Description
As shown in fig. 1, a fire door with two-way locking structure, frame body 1 includes ground 101, wall 102, door pocket 103 and arc groove 104, ground 101 left side fixed mounting has wall 102, and ground 101 right side fixed mounting has door pocket 103, through the setting of frame body 1, in the limited space between wall 102 and door pocket 103, reduce the area that door body mechanism 2 opened and closed needs, avoid causing the door body to be unable to open because of debris jam, cause the potential safety hazard, arc groove 104 has been seted up on ground 101 left side, and left gyro wheel 202 movable mounting is in arc groove 104, frame body 1 still includes vertical locked groove 105, switching groove 106 and horizontal locked groove 107, both ends intercommunication has vertical locked groove 105 about arc groove 104, and vertical locked groove 105 sets up in parallel in wall 102 inboard, switching groove 106 has been seted up to ground 101 middle part symmetry, and right gyro wheel 210 movable mounting is in switching groove 106, switching groove 106 right side terminal surface intercommunication has the horizontal locked groove 107 that is perpendicular to wall 102, and horizontal locked groove 107 agrees with the door pocket 103 inside, in addition, the groove 104 of ground 101 establishes to be as the left side of switching groove 106 and the open and the horizontal locked groove 107 that the left side of switching groove 107 when the closed door body mechanism is suitable for opening, the low door body mechanism is suitable for spreading to open the low door body mechanism of the low altitude of the public lock groove of the situation of the use of the promotion, it can be suitable for the promotion, it is suitable for the popularization of the public lock mechanism 201 of the low fire door body mechanism to open.
As shown in fig. 2, a door body mechanism 2 is movably installed inside a frame main body 1, the door body mechanism 2 includes a left fireproof door 201, a left roller 202, a T-shaped pin 203, a bearing 204, a sector gear 205, an expansion link 206, a door shaft 207, a rotary gear 208, a right fireproof door 209 and a right roller 210, the left roller 202 is installed at the bottom of the left fireproof door 201 in a rotating manner, in the process of rotating and folding the right fireproof door 209, the right fireproof door 209 drives the rotary gear 208 to rotate through the door shaft 207 on the left end face, under the meshing action of the rotary gear 208 and the sector gear 205 coaxial with the bottom of the bearing 204, the left roller 202 installed at the bottom of the left fireproof door 201 is located in an arc groove 104 formed on the left side of the ground 101 to rotate and is accommodated in a rotating manner following the folding stroke of the right fireproof door 209, the T-shaped pin 203 is installed at the right end face of the left fireproof door 201, the bearing 204 is installed at the middle of the left side of the T-shaped pin 203, a sector gear 205 is sleeved at the bottom of the bearing 204, telescopic rods 206 are installed at two sides of a T-shaped pin 203, the T-shaped pin 203 is rotatably installed on the right end face of the left fireproof door 201 through the bearing 204, the sector gear 205 and the bearing 204 are coaxially connected, the telescopic rods 206 are symmetrically installed on the left and right end faces of the T-shaped pin 203, a door shaft 207 is installed on the right side of the T-shaped pin 203, a rotating gear 208 is installed at the bottom of the door shaft 207, a right fireproof door 209 is installed at the back of the rotating gear 208, a user pulls or pushes the right fireproof door 209 through a handle installed on the right fireproof door 209, a right roller 210 at the bottom of the right fireproof door 209 is positioned in a switching groove 106 symmetrically formed in the middle of the ground 101 and slides, the door shaft 207 and the rotating gear 208 are coaxially connected, an external tooth profile of the rotating gear 208 is meshed with the sector gear 205, the right fireproof door 209 is rotatably installed at the right end of the T-shaped pin 203 through the door shaft 207, and a right roller 210 is rotatably installed at the bottom of the right fireproof door 209, prevent that fire door 201 in a left side and fire door 209 in a right side are connected through T shape round pin 203, guarantee that fire door 201 in a left side and fire door 209 in a right side can be in order to predetermine the synchronous folding of orbit, this time the rotatory stroke of accomodating of fire door 201 in a left side end face of T shape round pin 203 left and right sides is connected with wall 102 through telescopic link 206, play direction and auxiliary stay's effect, make to take place that the conflagration is fleed when the free condition of a fire escape no matter the pulling also or promote can both open fast and close door body mechanism 2 through the setting up of door body mechanism 2, increase the probability of fleing.
As shown in fig. 3, a locking mechanism 3 is movably mounted on the inner side of the wall 102, the locking mechanism 3 includes a hinge base 301, a clamping arm 302 and a roller 303, the clamping arm 302 is welded in the middle of the hinge base 301, the hinge base 301 is fixedly mounted on the inner side of the wall 102, two rollers 303 are movably mounted in the clamping arm 302, the locking mechanism 3 further includes a turning plate 304, a turning groove 305, an extending groove 306 and a connecting plate 307, the turning plate 304 is rotatably mounted in the clamping arm 302, the turning groove 305 with an arc structure is formed in the front of the turning plate 304, the middle of the turning groove 305, the right part and the bottom are both provided with horizontally oriented extending grooves 306, when the left fire door 201 and the right fire door 209 are in an idle state and need to be kept normally open, a user pushes the left fire door 201 in a folded state, and realizes the motion locking of the left roller 202 in the vertical locking groove 105 in the motion that the roller is located in the extending groove 306, at this time, the left fireproof door 201 and the right fireproof door 209 in an idle state are kept locked in parallel with the wall surface 102 and kept in a normally open state, the bottom of the turnover plate 304 is provided with a connecting plate 307, when an emergency situation occurs and the left fireproof door 201 and the right fireproof door 209 need to be closed, the operation process of the door body mechanism 2 is reversed, the hinge seat 301 is vertically installed on the inner side of the wall surface 102, the turnover plate 304 is movably installed in a clamping arm 302 welded on the front surface of the hinge seat 301, the rotation opening stroke of the left fireproof door 201 attached to the bottom of the turnover plate 304 through the connecting plate 307 is in a rotating opening process, the turnover plate 304 is connected with the door body of the left fireproof door 201 through the connecting plate 307, the roller 303 rotatably installed in the clamping arm 302 is located in a steering groove 305 formed in the front surface of the turnover plate 304 to move, when the left fireproof door 201 and the right fireproof door 209 are perpendicular to the wall surface 102, the roller 303 just moves to the tail end of the steering groove 305, at this time, a user pulls a handle of the right fireproof door 209, the right roller 210 at the bottom of the right fireproof door 209 is located at the horizontal symmetry axis of the switching groove 106 and moves horizontally, so that when the roller 303 goes deep into the extending groove 306, the right roller 210 naturally fits into the horizontal locking groove 107, the clamping of the right fireproof door 209 in the door pocket 103 is completed, and the sealing of the door body mechanism 2 is completed.
The working principle is as follows: when the fireproof door with the bidirectional locking structure is used, a user pulls or pushes the right fireproof door 209 through a handle arranged on the right fireproof door 209, a right roller 210 at the bottom of the right fireproof door 209 is positioned in a switching groove 106 symmetrically formed in the middle of the ground 101 to slide, in the process of rotating and folding the right fireproof door 209, the right fireproof door 209 drives a rotating gear 208 to rotate through a door shaft 207 on the left side end surface, under the meshing action of the rotating gear 208 and a sector gear 205 coaxially arranged at the bottom of a bearing 204, a left roller 202 arranged at the bottom of a left fireproof door 201 is positioned in an arc groove 104 formed in the left side of the ground 101 to rotate and rotate, and is rotatably accommodated along the folding stroke of the right fireproof door 209, the left fireproof door 201 and the right fireproof door 209 are connected through a T-shaped pin 203, so that the left fireproof door 201 and the right fireproof door 209 can be synchronously folded along a preset track, the left and right end faces of the T-shaped pin 203 are connected with the wall surface 102 through the telescopic rod 206 in the rotary accommodating stroke of the left fireproof door 201 to play a role of guiding and auxiliary supporting, an evacuee can quickly open and close the door mechanism 2 no matter pulling or pushing the door mechanism 2 when a fire disaster is in a leisure condition through the arrangement of the door mechanism 2, the escape probability is increased, when the left fireproof door 201 and the right fireproof door 209 are in an idle state and need to be kept normally open, a user pushes the folded left fireproof door 201 to realize the motion locking of the left roller 202 in the vertical locking groove 105 in the motion of the roller 303 in the extension groove 306, at the moment, the left fireproof door 201 and the right fireproof door 209 in the idle state keep parallel locking with the wall surface 102 and keep the normally open state, when the left fireproof door 201 and the right fireproof door 209 need to be closed in a dangerous condition, the operation process of the door mechanism 2 is reversed, and the hinge seat 301 is vertically installed on the inner side of the wall surface 102, the turnover plate 304 is movably installed in a clamping arm 302 welded to the front face of a hinge base 301, a roller 303 installed in the rotation of the turnover plate 302 is located in a turning groove 305 formed in the front face of the turnover plate 304 to move in a rotating opening process of a left fireproof door 201 attached to the bottom of the turnover plate 304 through a connecting plate 307, when the left fireproof door 201 and a right fireproof door 209 are perpendicular to a wall surface 102, the roller 303 just moves to the tail end of the turning groove 305, at the moment, a user pulls a handle of the right fireproof door 209 to enable a right roller 210 at the bottom of the right fireproof door 209 to be located at a horizontal symmetrical axis of a switching groove 106 to horizontally move, so that the roller 303 deeply extends into an extension groove 306, the right roller 210 naturally fits into a horizontal locking groove 107, the right fireproof door 209 is clamped in a door sleeve 103, the door mechanism 2 is sealed, the opening of the arc groove 104 of the ground 101 and the switching groove 106 are set to provide a folding opening guide groove 105 for the fireproof door 201 and the fireproof door mechanism, the door mechanism is convenient to spread in a horizontal state when the door mechanism is used for preventing fire spreading.

Claims (7)

1. The utility model provides a prevent fire door with two-way locking structure, includes frame main part (1) and door body mechanism (2), its characterized in that, the inside movable mounting of frame main part (1) has door body mechanism (2), door body mechanism (2) is including left side prevent fire door (201), left gyro wheel (202), T shape round pin (203), bearing (204), sector gear (205), telescopic link (206), door-hinge (207), swing pinion (208), right side prevent fire door (209) and right gyro wheel (210), prevent fire door (201) bottom rotation and install left gyro wheel (202) in a left side, and prevent fire door (201) right side terminal surface and install T shape round pin (203), T shape round pin (203) left side mid-mounting has bearing (204), and bearing (204) bottom cover is equipped with sector gear (205), telescopic link (206) are installed to T shape round pin (203) both sides, and T shape round pin (203) right side installs door-hinge (207), rotary gear (208) are installed to door-hinge (207) bottom, and swing pinion (208) install right side (209) back, prevent fire door (209) are installed to right side (209) bottom rotation and prevent fire door (210).
2. The fire door with the bidirectional locking structure as claimed in claim 1, wherein the T-shaped pin (203) is rotatably mounted on the right side end face of the left fire door (201) through a bearing (204), the sector gear (205) and the bearing (204) form a coaxial connection, and the telescopic rods (206) are symmetrically mounted on the left side end face and the right side end face of the T-shaped pin (203).
3. The fire door with a bidirectional locking structure as recited in claim 1, characterized in that the door shaft (207) is coaxially connected with the rotary gear (208), the external tooth profile of the rotary gear (208) is engaged with the sector gear (205), and the right fire door (209) is rotatably mounted at the right end of the T-shaped pin (203) through the door shaft (207).
4. The fireproof door with the bidirectional locking structure according to claim 1, wherein the frame body (1) comprises a ground (101), a wall surface (102), a door pocket (103) and an arc groove (104), the wall surface (102) is fixedly mounted on the left side of the ground (101), the door pocket (103) is fixedly mounted on the right side of the ground (101), the arc groove (104) is formed in the left side of the ground (101), and the left roller (202) is movably mounted in the arc groove (104).
5. The fire door with the bidirectional locking structure as recited in claim 4, wherein the frame body (1) further comprises a vertical locking groove (105), a switching groove (106) and a horizontal locking groove (107), the upper end and the lower end of the arc groove (104) are communicated with the vertical locking groove (105), the vertical locking groove (105) is arranged on the inner side of the wall surface (102) in parallel, the switching groove (106) is symmetrically formed in the middle of the ground surface (101), the right roller (210) is movably mounted in the switching groove (106), the end face of the right side of the switching groove (106) is communicated with the horizontal locking groove (107) perpendicular to the wall surface (102), and the horizontal locking groove (107) is matched with the inside of the door pocket (103).
6. The fire door with the bidirectional locking structure as recited in claim 4, wherein the locking mechanism (3) is movably mounted on the inner side of the wall surface (102), the locking mechanism (3) comprises a hinge base (301), a clamping arm (302) and a roller (303), the clamping arm (302) is welded in the middle of the hinge base (301), the hinge base (301) is fixedly mounted on the inner side of the wall surface (102), and two rollers (303) are movably mounted in the clamping arm (302).
7. The fire door with the bidirectional locking structure as recited in claim 6, wherein the locking mechanism (3) further comprises a turning plate (304), a turning groove (305), an extension groove (306) and a connecting plate (307), the turning plate (304) is rotatably installed inside the clamping arm (302), the turning groove (305) with an arc-shaped structure is formed in the front surface of the turning plate (304), the extension groove (306) with a horizontal orientation is formed in the middle of the turning groove (305), the right part and the bottom of the turning groove (305), the connecting plate (307) is installed at the bottom of the turning plate (304), and the turning plate (304) is connected with the door body of the left fire door (201) through the connecting plate (307).
CN202121831983.5U 2021-08-06 2021-08-06 Prevent fire door with two-way locking structure Active CN218206448U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121831983.5U CN218206448U (en) 2021-08-06 2021-08-06 Prevent fire door with two-way locking structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121831983.5U CN218206448U (en) 2021-08-06 2021-08-06 Prevent fire door with two-way locking structure

Publications (1)

Publication Number Publication Date
CN218206448U true CN218206448U (en) 2023-01-03

Family

ID=84627535

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121831983.5U Active CN218206448U (en) 2021-08-06 2021-08-06 Prevent fire door with two-way locking structure

Country Status (1)

Country Link
CN (1) CN218206448U (en)

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