CN114197994A - Stair door structure capable of being automatically closed - Google Patents
Stair door structure capable of being automatically closed Download PDFInfo
- Publication number
- CN114197994A CN114197994A CN202111553014.2A CN202111553014A CN114197994A CN 114197994 A CN114197994 A CN 114197994A CN 202111553014 A CN202111553014 A CN 202111553014A CN 114197994 A CN114197994 A CN 114197994A
- Authority
- CN
- China
- Prior art keywords
- stair
- door
- door body
- stair door
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 description 16
- 230000002265 prevention Effects 0.000 description 7
- 235000019504 cigarettes Nutrition 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
- E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
- E06B3/36—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement with a single vertical axis of rotation at one side of the opening, or swinging through the opening
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F7/00—Accessories for wings not provided for in other groups of this subclass
- E05F7/06—Devices for taking the weight of the wing, arranged away from the hinge axis
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
- E06B5/164—Sealing arrangements between the door or window and its frame, e.g. intumescent seals specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
- E06B7/22—Sealing arrangements on wings or parts co-operating with the wings by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips
- E06B7/23—Plastic, sponge rubber, or like strips or tubes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/132—Doors
- E05Y2900/134—Fire doors
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Special Wing (AREA)
Abstract
The invention relates to a stair door structure capable of being automatically closed, which relates to the technical field of stair doors and comprises a floor, wherein a door frame is arranged on the upper surface of the floor, a stair door body is rotationally connected in the door frame, a ground rail is arranged on one side, located on the stair door body, of the upper surface of the floor, a door closer main body is fixedly connected to the upper end, located on the stair door body, of one side of the door frame, the lower surface of the door closer main body is movably connected with a door closer movable end, and one end of the door closer movable end is arranged on the stair door body.
Description
Technical Field
The invention relates to the technical field of stair doors, in particular to a stair door structure capable of being automatically closed.
Background
The stair door is the door of installing in the stairwell, mainly keeps apart traffic spaces such as stair and corridor, and the stair door also is the instrument that lets traffic spaces such as stair and corridor take place to contact simultaneously, because open the stairwell and be connected with places such as corridor, so need not set up the stair door, the stair door is usually set up at closed stairwell and smoke protection stairwell.
The closed stairwell can be generally used as a safety channel, so that a stairway door installed on the closed stairwell generally requires a fireproof function, but the stairway door can be opened or closed frequently in daily life, so that the stairway door can be spaced from the ground by a short distance for opening conveniently, and when a fire disaster occurs, dense smoke can be generated in a gap to leak, and people can be evacuated disadvantageously.
Disclosure of Invention
In view of the above problems in the prior art, it is a primary object of the present invention to provide an automatically closable stair door structure.
The technical scheme of the invention is as follows:
the utility model provides a but self-closing's stair door structure, includes the floor, the upper surface on floor is provided with the door frame, the door frame internal rotation is connected with stair door body, one side that the upper surface on floor is located stair door body is provided with the ground track, door frame one side is located the upper end fixedly connected with door closer main part of stair door body, the lower surface swing joint of door closer main part has the door closer expansion end, and the one end setting of door closer expansion end is on stair door body, one side of stair door body is provided with the telescopic link No. one, the one end fixedly connected with separation rectangular board of telescopic link No. one, the lower surface swing joint of separation rectangular board has the gyro wheel.
One side of the door frame is positioned at the position of the door closer main body and is connected with a fireproof heat-insulation shell in a sliding way; the setting of fire prevention thermal-insulated shell can effectively promote the fire prevention heat-resisting ability of door closer main part when the conflagration takes place, can prevent to a certain extent that accidental damage from appearing in the door closer main part and leading to the condition of the good switch of stair door body.
Fireproof paint is coated on the outer surface of the movable end of the door closer; the movable end of the door closer is arranged outside the fireproof heat-insulation shell, fireproof paint is coated on the movable end of the door closer to improve the fire resistance of the fireproof heat-insulation shell, and meanwhile, the movable end of the fireproof heat-insulation shell does not interfere with the movement of the fireproof heat-insulation shell when the stair door body is opened and closed.
The top end part of the first telescopic rod is provided with a movable extension rod, and the movable extension rod is connected in a sliding manner inside the stair door body; the arrangement of the movable extension rod can enhance the stability of the first telescopic rod during transverse movement.
One side of the stair door body is fixedly connected with a second telescopic rod, one end of the second telescopic rod is fixedly connected with a connecting long plate, and the connecting long plate is fixedly connected with the first telescopic rod; no. two telescopic links and the setting of connecting the long slab let telescopic link and separation long slab realize controllable lateral shifting to can guarantee to a certain extent that the long slab of separation keeps motionless state after removing.
One side of the blocking long plate is fixedly connected with a clamping block, and the clamping block can be clamped and connected with the stair door body; the arrangement of the clamping block can effectively improve the sealing degree by clamping with the stair door body.
A rubber sealing layer is arranged on the outer surface of the clamping block; the setting of rubber sealing layer further makes the surface of block laminating stair door body on the basis of block and stair door body block, has promoted sealed degree, prevents that dense cigarette from permeating through stair door body and wafting to sealing the stairwell.
A fireproof plate is arranged in the stair door body; the setting of PLASTIC LAMINATED can effectively promote the fire-resistant ability of stair door body.
The invention has the following advantages and beneficial effects:
this technical scheme is when the conflagration takes place, people can open stair door body and flee from sealing the stairwell, at this moment, cooperation through door closer main part and door closer expansion end makes stair door body can self-closing when being opened, it is more convenient, carry out downwardly extending through control telescopic link simultaneously, drive the long board of separation downstream, can block up the gap that stair door body and floor were reserved, dense cigarette that can prevent the conflagration production to a certain extent is followed the gap and is scurried out, after the long board of separation was put down, accessible gyro wheel roll in the ground track when stair door body was opened, come to be favorable to opening and shutting of stair door body.
This technical scheme fire prevention thermal-insulated shell's setting can effectively promote the fire prevention heat-resisting ability of door closer main part when the conflagration takes place, can prevent to a certain extent that door closer main part from the unexpected condition that damages and lead to the not good switch of stair door body to appear, the outside of fire prevention thermal-insulated shell is arranged in to door closer expansion end, improve the refractiveness of fire prevention thermal-insulated shell through applying paint with a brush, do not hinder the activity of fire prevention thermal-insulated shell when stair door body switch simultaneously again, the stability of telescopic link when lateral shifting can be strengthened to the setting of activity extension rod, No. two telescopic links and the setting of being connected the long slab let a telescopic link and separation long slab realize controllable lateral shifting, and can guarantee to a certain extent that the separation long slab keeps motionless state after removing, the setting of block can effectively promote sealed degree through carrying out the block with the stair door body, the setting of rubber sealing layer further makes the block laminating on the basis of block and stair door body block The surface of stair door body has promoted sealed degree, prevents that dense cigarette from permeating through the stair door body and wafts and scatter to sealing the stairwell, and the fire proof capability of stair door body can effectively be promoted in the setting of PLASTIC LAMINATED.
Drawings
Fig. 1 is a schematic overall front view of an automatically closable stair door structure according to an embodiment of the present invention;
fig. 2 is a schematic view of an overall back structure of an automatically closable stair door structure according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a blocking long plate part of an automatically closable stair door structure according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a door closer main body portion of an automatically closable stair door structure according to an embodiment of the present invention.
Illustration of the drawings:
1. a floor; 11. a door frame; 12. a stair door body; 13. a ground track;
2. a door closer main body; 21. a movable end of the door closer; 22. a fire-proof heat-insulating housing;
3. a first telescopic rod; 31. a blocking long plate; 32. a roller; 33. a movable extension rod; 34. a clamping block; 35. a rubber sealing layer;
4. a second telescopic rod; 5. and connecting the long plates.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
The invention will be further described with reference to the drawings and specific examples.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a technical solution: the utility model provides a but self-closing's stair door structure, including floor 1, the upper surface on floor 1 is provided with door frame 11, 11 internal rotations in door frame are connected with stair door body 12, one side that the upper surface on floor 1 is located stair door body 12 is provided with ground track 13, door frame 11 one side is located stair door body 12's upper end fixedly connected with door closer main part 2, door closer main part 2's lower surface swing joint has door closer expansion end 21, and the one end setting of door closer expansion end 21 is on stair door body 12, one side of stair door body 12 is provided with telescopic link 3 No. one, the one end fixedly connected with separation rectangular board 31 of telescopic link 3 No. one, the lower surface swing joint of separation rectangular board 31 has gyro wheel 32.
In this embodiment, when the conflagration takes place, people can open stair door body 12 and flee from sealing the stairwell, at this moment, cooperation through door closer main part 2 and door closer expansion end 21 makes stair door body 12 can self-closing when being opened, it is more convenient, carry out downwardly extending through control telescopic link 3 simultaneously, drive separation long slab 31 downstream, can block up the gap that stair door body 12 and floor 1 remain, can prevent the dense cigarette that the conflagration produced from scurrying out from the gap to a certain extent, after separation long slab 31 is put down, accessible gyro wheel 32 when stair door body 12 is opened rolls in ground track 13, be favorable to opening and shutting of stair door body 12.
As shown in fig. 3 and 4, a fireproof heat insulation shell 22 is slidably connected to a position, located on the door closer main body 2, of one side of the door frame 11, fireproof paint is coated on the outer surface of the door closer movable end 21, a movable extension rod 33 is arranged at the top end portion of a first telescopic rod 3, the movable extension rod 33 is slidably connected inside the stair door body 12, a second telescopic rod 4 is fixedly connected to one side of the stair door body 12, a long plate 5 is fixedly connected to one end of the second telescopic rod 4, the long plate 5 is fixedly connected to the first telescopic rod 3, a clamping block 34 is fixedly connected to one side of the separation long plate 31, the clamping block 34 can be clamped and connected to the stair door body 12, a rubber sealing layer 35 is arranged on the outer surface of the clamping block 34, and a fireproof plate is arranged in the stair door body 12.
In this embodiment, the fireproof heat-resistant capability of the door closer main body 2 when a fire occurs can be effectively improved by the arrangement of the fireproof heat-insulating housing 22, and the situation that the stair door body 12 is not opened or closed well due to accidental damage of the door closer main body 2 can be prevented to a certain extent, the movable end 21 of the door closer is arranged outside the fireproof heat-insulating housing 22, the fire resistance of the fireproof heat-insulating housing 22 is improved by coating fireproof paint, and the movement of the fireproof heat-insulating housing 22 when the stair door body 12 is opened or closed is not hindered, the stability of the first telescopic rod 3 during transverse movement can be enhanced by the arrangement of the movable extension rod 33, the controllable transverse movement of the first telescopic rod 3 and the blocking long plate 31 can be realized by the arrangement of the second telescopic rod 4 and the connecting long plate 5, and the immovable state of the blocking long plate 31 after the movement can be ensured to a certain extent, the arrangement of the blocking block 34 can effectively improve the sealing degree by being blocked with the stair door body 12, the setting of rubber sealing layer 35 further makes the surface of block 34 laminating stair door body 12 on the basis of block 34 and stair door body 12 block, has promoted sealed degree, prevents that dense smoke from permeating through stair door body 12 and wafting closed staircase, and the setting of PLASTIC LAMINATED can effectively promote the fire-protecting ability of stair door body 12.
The working principle is as follows:
as shown in fig. 1, 2, 3 and 4, when the present invention is used, a user first holds the door handle of the stair door body 12 and rotates the door handle, and then rotates and pushes the stair door body 12 on the door frame 11, so that the door frame 11 can be passed, and then the door closer main body 2 cooperates with the door closer movable end 21 to pull back the stair door body 12 from the open state, and then the stair door body 12 returns to the closed state of the stair door body 12 to complete the automatic closing of the stair door body 12.
When a fire disaster occurs, the first telescopic rod 3 is controlled to extend downwards to drive the separation long plate 31 to move downwards, when the roller 32 enters the ground track 13 arranged on the floor 1, the extension of the first telescopic rod 3 is stopped, then the second telescopic rod 4 is contracted, the contraction of the second telescopic rod 4 drives the connecting long plate 5 to move inwards, the movement of the connecting long plate 5 drives the first telescopic rod 3, the separation long plate 31 and the movable extension rod 33 to move inwards, so that the clamping block 34 and the rubber sealing layer 35 are clamped in the groove arranged on the stair door body 12, a gap existing below the stair door body 12 is sealed, thick smoke can be prevented from drifting into a closed stair room through the gap to a certain extent, meanwhile, the fireproof heat insulation shell 22 arranged improves the fireproof capacity of the door closer main body 2, when the separation long plate 31 is in a sealing state, and the stair door body 12 is opened, the rollers 32 roll in the ground rails 13, facilitating the opening and closing of the stair door body 12.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. An automatically closable stair door structure comprising a floor (1), characterized in that: the upper surface of the floor (1) is provided with a door frame (11), a stair door body (12) is rotatably connected to the door frame (11), a ground rail (13) is arranged on one side, located on the stair door body (12), of the upper surface of the floor (1), a door closer main body (2) is fixedly connected to the upper end, located on the stair door body (12), of one side of the door frame (11), a door closer movable end (21) is movably connected to the lower surface of the door closer main body (2), one end of the door closer movable end (21) is arranged on the stair door body (12), a first telescopic rod (3) is arranged on one side of the stair door body (12), one end of the first telescopic rod (3) is fixedly connected with a blocking long plate (31), and the lower surface of the blocking long plate (31) is movably connected with a roller (32); one side of the door frame (11) is positioned at the position of the door closer main body (2) and is connected with a fireproof heat-insulation shell (22) in a sliding way.
2. An automatically closable stair door structure according to claim 1, wherein: the outer surface of the movable end (21) of the door closer is coated with fireproof paint.
3. An automatically closable stair door structure according to claim 1, wherein: the top end part of the first telescopic rod (3) is provided with a movable extension rod (33), and the movable extension rod (33) is connected inside the stair door body (12) in a sliding mode.
4. An automatically closable stair door structure according to claim 1, wherein: one side fixedly connected with telescopic link (4) No. two of stair door body (12), the one end fixedly connected with of telescopic link (4) connects rectangular plate (5), and connects rectangular plate (5) and telescopic link (3) and carry out fixed connection.
5. An automatically closable stair door structure according to claim 1, wherein: one side of the blocking long plate (31) is fixedly connected with a clamping block (34), and the clamping block (34) can be clamped and connected with the stair door body (12).
6. An automatically closable stair door structure according to claim 5, wherein: and a rubber sealing layer (35) is arranged on the outer surface of the clamping block (34).
7. An automatically closable stair door structure according to claim 1, wherein: the staircase door body (12) is internally provided with a fireproof plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111553014.2A CN114197994A (en) | 2021-12-17 | 2021-12-17 | Stair door structure capable of being automatically closed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111553014.2A CN114197994A (en) | 2021-12-17 | 2021-12-17 | Stair door structure capable of being automatically closed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114197994A true CN114197994A (en) | 2022-03-18 |
Family
ID=80655013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111553014.2A Pending CN114197994A (en) | 2021-12-17 | 2021-12-17 | Stair door structure capable of being automatically closed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114197994A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328914A (en) * | 2005-05-30 | 2006-12-07 | World Garage Door:Kk | Movable partition and movable partition assembly |
| KR101932620B1 (en) * | 2018-08-20 | 2018-12-26 | 민규식 | Fire door with differential pressure adjustment function |
| CN210033178U (en) * | 2019-05-10 | 2020-02-07 | 上海呈翔金属制品有限公司 | Stainless steel fireproof door with good smoke blocking function |
| CN210317074U (en) * | 2019-05-10 | 2020-04-14 | 江苏元奕朗甚装饰工程有限公司 | Novel heat-insulation fireproof door |
| CN210343132U (en) * | 2019-05-08 | 2020-04-17 | 天津众和恒泰人防工程防护设备有限公司 | High strength people's air defense door |
| CN111305701A (en) * | 2020-01-20 | 2020-06-19 | 北京东邦绿建科技有限公司 | Barrier-free door with lower frame sealing structure |
| CN211144196U (en) * | 2019-07-04 | 2020-07-31 | 张良山 | Safe sealing type door and window |
| CN213205468U (en) * | 2020-09-01 | 2021-05-14 | 重庆德川木业有限公司 | Timber with function gives sound insulation |
| CN213297760U (en) * | 2020-06-19 | 2021-05-28 | 安徽省宿州市王中王门业有限公司 | Bottom sealing starting device for fireproof door |
| CN214463757U (en) * | 2020-12-23 | 2021-10-22 | 罗戈 | Novel fireproof door |
-
2021
- 2021-12-17 CN CN202111553014.2A patent/CN114197994A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328914A (en) * | 2005-05-30 | 2006-12-07 | World Garage Door:Kk | Movable partition and movable partition assembly |
| KR101932620B1 (en) * | 2018-08-20 | 2018-12-26 | 민규식 | Fire door with differential pressure adjustment function |
| CN210343132U (en) * | 2019-05-08 | 2020-04-17 | 天津众和恒泰人防工程防护设备有限公司 | High strength people's air defense door |
| CN210033178U (en) * | 2019-05-10 | 2020-02-07 | 上海呈翔金属制品有限公司 | Stainless steel fireproof door with good smoke blocking function |
| CN210317074U (en) * | 2019-05-10 | 2020-04-14 | 江苏元奕朗甚装饰工程有限公司 | Novel heat-insulation fireproof door |
| CN211144196U (en) * | 2019-07-04 | 2020-07-31 | 张良山 | Safe sealing type door and window |
| CN111305701A (en) * | 2020-01-20 | 2020-06-19 | 北京东邦绿建科技有限公司 | Barrier-free door with lower frame sealing structure |
| CN213297760U (en) * | 2020-06-19 | 2021-05-28 | 安徽省宿州市王中王门业有限公司 | Bottom sealing starting device for fireproof door |
| CN213205468U (en) * | 2020-09-01 | 2021-05-14 | 重庆德川木业有限公司 | Timber with function gives sound insulation |
| CN214463757U (en) * | 2020-12-23 | 2021-10-22 | 罗戈 | Novel fireproof door |
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