CN110644879A - Curtain wall opening sash hanging system - Google Patents
Curtain wall opening sash hanging system Download PDFInfo
- Publication number
- CN110644879A CN110644879A CN201910929261.4A CN201910929261A CN110644879A CN 110644879 A CN110644879 A CN 110644879A CN 201910929261 A CN201910929261 A CN 201910929261A CN 110644879 A CN110644879 A CN 110644879A
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- CN
- China
- Prior art keywords
- opening
- mounting
- fan
- curtain wall
- hanging system
- 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.)
- Granted
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Classifications
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- 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
- E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
- E05F11/02—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
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- 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
- E05F5/00—Braking devices, e.g. checks; Stops; Buffers
- E05F5/06—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
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- 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
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/52—Devices affording protection against insects, e.g. fly screens; Mesh windows for other purposes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
The invention relates to the technical field of curtain wall structures, in particular to a curtain wall opening sash hanging system which comprises a mounting and fixing piece, wherein the mounting and fixing piece is mounted on a keel, an opening sash is arranged on the mounting and fixing piece, an opening and closing mechanism is mounted on one side of the opening sash and comprises a linkage assembly and a lifting assembly, the linkage assembly is fixedly arranged on one side of the opening sash, the lifting assembly is fixedly arranged on the linkage assembly and comprises a lifting rod, the lifting rod penetrates through the mounting and fixing piece to extend downwards and vertically lift on the mounting and fixing piece, and the opening window is opened and closed by adjusting the lifting assembly to lift. The invention has the effects of facilitating the opening and closing of the opening fan at the high position to be controlled by a user at the low position and facilitating the opening and closing of the opening fan to be controlled.
Description
Technical Field
The invention relates to the technical field of curtain wall structures, in particular to a curtain wall opening sash hanging system.
Background
In the building industry, glass curtain walls are used more and more widely, have good light transmission and are attractive at the same time; however, due to the strong light transmission, the indoor temperature is often increased and becomes very stuffy, so that the glass curtain wall is provided with the opening fan which is rotatably arranged on the glass curtain wall, the opening fan is opened by rotating to realize ventilation, and the indoor and outdoor gases form convection, thereby alleviating stuffiness; because cold air can flow down during the air convection, hot-air can flow upwards, thereby will open the fan setting and enable hot-air and outdoor exchange in higher position, promote the ventilation and slow down sultry effect.
The above prior art solutions have the following drawbacks: because will open the fan and install in the eminence, though the ventilation slows down the effect of vexation and has promoted, can bring and open the problem that the fan opened and close the difficulty.
Disclosure of Invention
The invention aims to provide a curtain wall opening sash hanging system which can facilitate a user to control the opening and closing of an opening sash at a high position at a low position and control the opening and closing of the opening sash conveniently.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a curtain is opened a and is hung dress system, includes the installation mounting, the installation mounting is installed on fossil fragments, is provided with on the installation mounting and opens the fan, open fan one side and install hoist mechanism, hoist mechanism includes linkage assembly and lifting unit, the linkage assembly sets firmly in opening one side, lifting unit sets firmly on the linkage assembly, and lifting unit includes the lifter, and the lifter passes installation mounting downwardly extending to vertical lift on the installation mounting, through adjusting the lifting unit lift, the control is opened a and is opened and close.
Through adopting above-mentioned technical scheme, through linkage subassembly cooperation lift subassembly, the steerable opening and close of opening the fan, and the lifter passes installation mounting downwardly extending can be when opening the fan and install in the eminence, and the person of facilitating the use opens and close of opening the fan of eminence in the low control, and the convenient control is opened opening and close of fan.
The invention is further configured to: the lifting component is characterized in that one side, far away from the linkage component, of the lifting rod is provided with threads, the lifting component further comprises a lifting nut, the lifting nut is rotatably arranged on the installation fixing part, and the lifting nut is in threaded connection with the lifting rod.
Through adopting above-mentioned technical scheme, rotate lifting nut control lifter and go up and down on the installation mounting to realize cooperating linkage assembly control and open and close of opening the fan.
The invention is further configured to: the lifting nut is a hand-screwed nut.
Through adopting above-mentioned technical scheme, the design of nut is twisted to the hand, can the person of facilitating the use rotate lifting nut.
The invention is further configured to: the linkage subassembly includes deflector, the groove that slides, sliding post and gangbar, the deflector sets firmly opening a one side, the groove slope of sliding is seted up on the deflector, and the groove that slides is kept away from and is opened a side and be higher than the groove that slides and be close to and open a one side, the post that slides sets up at the inslot that slides to offer the direction along the groove that slides and slide, the gangbar sets firmly on the sliding post, and it is fixed with the lifter that sliding post one end is kept away from to the gangbar.
By adopting the technical scheme, the guide plate is used for arranging the sliding groove, the sliding groove is obliquely arranged, and when the linkage rod is vertically driven by the lifting rod to lift, the sliding column is fixedly lifted, and the sliding groove is matched with the sliding column to drive the opening fan to open.
The invention is further configured to: the installation mounting includes the mounting, rotates piece and butt piece, the mounting has two, and two mountings are fixed respectively on two adjacent fossil fragments from top to bottom, rotate the piece and install in top mounting fixing part towards fixing part one side down, rotate the piece and be used for hanging to establish and open to the messenger opens a rotation, the butt piece is installed in below mounting towards top fixing part one side, and the butt piece is used for the butt to open a fan.
Through adopting above-mentioned technical scheme, rotate the piece and be used for articulating and open the fan, conveniently open the rotation of fan.
The invention is further configured to: the rotating part comprises a fixing part and a rotating part, the fixing part is fixedly arranged on the fixing part, the rotating part is rotatably arranged on the fixing part, and the opening fan is fixedly arranged on the rotating part.
Through adopting above-mentioned technical scheme, the setting of fixed part and rotation portion makes opening the fan and can be more stable rotate on the installation mounting.
The invention is further configured to: the fixed part is fixedly provided with a supporting plate, the rotating part is fixedly provided with a supporting block, and the supporting block is abutted against the supporting plate when the opening fan is closed.
Through adopting above-mentioned technical scheme, the setting of backup pad and supporting shoe makes and opens and can give a holding power when the fan is closed, increases the structural strength when opening the fan closure.
The invention is further configured to: and a rubber pad is arranged on the supporting plate.
Through adopting above-mentioned technical scheme, the setting of rubber pad can slow down, and the backup pad prevents that the backup pad from being damaged by the backup pad striking to the impact force of backup pad.
The invention is further configured to: two the mounting part is all installed to mounting back of the body one side mutually, the mounting part is used for installing the curtain.
Through adopting above-mentioned technical scheme, the setting of installed part is used for installing the curtain, guarantees the normal installation of curtain.
The invention is further configured to: and a folding gauze is arranged between the abutting piece and the opening sash.
Through adopting above-mentioned technical scheme, the setting of folding gauze blocks winged insect and debris and gets into indoorly from opening a fan opening part when opening a fan and opening.
In conclusion, the beneficial technical effects of the invention are as follows:
the opening and closing of the opening fan can be controlled by matching the linkage assembly with the lifting assembly, and the lifting rod penetrates through the mounting fixing piece to extend downwards so that a user can conveniently control the opening and closing of the opening fan at the high position and conveniently control the opening and closing of the opening fan at the low position when the opening fan is mounted at the high position;
the lifting nut is rotated to control the lifting rod to lift on the mounting fixing piece, so that the opening and closing of the opening fan are controlled by matching with the linkage assembly;
the guide plate is used for forming a sliding groove, the sliding groove is obliquely formed, when the linkage rod is vertically driven by the lifting rod to lift, the sliding groove is matched with the sliding column to drive the opening fan to open as the sliding column is fixedly lifted;
the rotating piece is used for hanging the opening fan, so that the opening fan can rotate conveniently;
the supporting plate and the supporting block are arranged, so that a supporting force can be applied to the opening fan when the opening fan is closed, and the structural strength of the opening fan when the opening fan is closed is improved;
the rubber pad can reduce the impact force of the supporting block on the supporting plate, and the supporting plate is prevented from being damaged due to the impact of the supporting block;
the arrangement of the folding gauze net prevents winged insects and sundries from entering the room from the opening of the opening sash when the opening sash is opened.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic cross-sectional view of the overall structure of the present invention.
In the figure, 0, keel; 1. mounting a fixing piece; 101. a fixing member; 102. a rotating member; 1021. a fixed part; 1022. a rotating part; 103. an abutting member; 2. opening the fan; 3. an opening and closing mechanism; 301. a linkage assembly; 3011. a guide plate; 3012. a sliding groove; 3013. sliding the column; 3014. a linkage rod; 302. a lifting assembly; 3021. a lifting rod; 3022. a lifting nut; 4. a thread; 5. a support plate; 6. a support block; 7. a rubber pad; 8. a mounting member; 9. and folding the gauze.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the curtain wall opening sash hanging system disclosed by the invention comprises a mounting fixing member 1, the mounting fixing member 1 is mounted on a keel 0, an opening sash 2 is arranged on the mounting fixing member 1, an opening and closing mechanism 3 is mounted on one side of the opening sash 2, the opening and closing mechanism 3 comprises a linkage assembly 301 and a lifting assembly 302, the linkage assembly 301 is fixedly arranged on one side of the opening sash 2, the lifting assembly 302 is fixedly arranged on the linkage assembly 301, the lifting assembly 302 comprises a lifting rod 3021, the lifting rod 3021 penetrates through the mounting fixing member 1 to extend downwards and vertically lift on the mounting fixing member 1, the opening and closing of the opening sash 2 are controlled by adjusting the lifting assembly 302 to lift, the linkage assembly 301 is matched with the lifting assembly 302 to control the opening and closing of the opening sash 2, the lifting rod 3021 penetrates through the mounting fixing member 3021 to extend downwards to be capable of controlling the opening sash 2 to be mounted at a high position when the opening, the opening and closing of the opening fan 2 are conveniently controlled.
Referring to fig. 1, a thread 4 is formed on one side of the lifting rod 3021, which is away from the linkage assembly 301, the lifting assembly 302 further includes a lifting nut 3022, the lifting nut 3022 is rotatably disposed on the mounting fixture 1, the lifting nut 3022 is in threaded connection with the lifting rod 3021, and the lifting nut 3022 is rotated to control the lifting rod 3021 to lift on the mounting fixture 1, so that the linkage assembly 301 is matched to control the opening and closing of the opening sash 2; the lifting nut 3022 is a hand-screwed nut, and the lifting nut 3022 can be rotated by a user conveniently due to the design of the hand-screwed nut.
Referring to fig. 1, the linkage assembly 301 includes a guide plate 3011 fixed on one side of the opening sash 2, a sliding slot 3012 obliquely formed on the guide plate 3011, a sliding column 3013 slidably disposed in the sliding slot 3012, and a linkage rod 3014 fixed on the sliding column 3013, where one side of the sliding slot 3012 away from the opening sash 2 is higher than one side of the sliding slot 3012 close to the opening sash 2, the sliding column 3013 slides along the opening direction of the sliding slot 3012, one end of the linkage rod 3014 away from the sliding column 3013 is fixed to the lifting rod 3021, the guide plate 3011 is used for forming the sliding slot 3012, the sliding slot 3012 is obliquely formed, and when the linkage rod 3014 is vertically driven by the lifting rod 3021 to lift, because the sliding column 3013 is fixed to rise, the sliding slot 3012 cooperates with the sliding column 3013 to drive the opening sash 2 to open.
Referring to fig. 1 and 2, the installation fixing member 1 includes two fixing members 101 respectively fixed on two adjacent keels 0 from top to bottom, install the rotating member 102 towards lower fixing member 101 one side of top fixing member 101 and install in the butt piece 103 towards upper fixing member 101 one side of bottom fixing member 101, the fixing member 101, rotating member 102 and butt piece 103 are metal components, rotating member 102 and butt piece 103 pass through the bolt fastening on fixing member 101, rotating member 102 is used for hanging and establishes and open, and make and open fan 2 and rotate, butt piece 103 is used for butt opening fan 2, the decoration groove has been seted up to fixing member 101 deviating from 0 side of keel, the decoration groove is used for installing the ornamental strip, increase present pleasing to the eye degree.
Referring to fig. 1 and 2, the rotation member 102 includes a fixing portion 1021 fixed to the fixing member 101 and a rotation portion 1022 rotatably disposed on the fixing portion 1021, the opening fan 2 is fixed to the rotation portion 1022, and the fixing portion 1021 and the rotation portion 1022 are disposed such that the opening fan 2 can more stably rotate on the mounting fixing member 1; the fixing part 1021 is fixedly provided with a supporting plate 5, the rotating part 1022 is fixedly provided with a supporting block 6, when the opening fan 2 is closed, the supporting block 6 is abutted against the supporting plate 5, and the supporting plate 5 and the supporting block 6 are arranged, so that a supporting force can be provided for the opening fan 2 when the opening fan 2 is closed, and the structural strength when the opening fan 2 is closed is increased; be provided with rubber pad 7 on the backup pad 5, the setting of rubber pad 7 can slow down, and backup pad 5 is prevented by the striking of backup pad 6 and damage to backup pad 6 to the impact force of backup pad 5 by supporting shoe 6.
Referring to fig. 1, the mounting parts 8 are mounted on the opposite sides of the fixing parts 101, and the mounting parts 8 are used for mounting a curtain wall to ensure normal installation of the curtain wall.
Referring to fig. 1 and 2, a folding gauze 9 is installed between the abutting piece 103 and the opening sash 2, the folding gauze 9 is unfolded when the opening sash 2 is opened and is blocked at the opening of the opening sash 2, and is folded when the opening sash 2 is closed, and the arrangement of the folding gauze 9 is used for blocking flying insects and sundries from entering a room from the opening of the opening sash 2 when the opening sash 2 is opened.
The implementation principle of the embodiment is as follows: two fixed fixtures 101 are respectively installed on two adjacent keels 0 at the upper and lower sides, a rotating member 102 is installed at the upper fixed fixture 101 towards the lower fixed fixture 101, a fixed part 1021 of the rotating member 102 is fixed on the fixed fixture 101 through a bolt, an abutting member 103 is installed at the lower fixed fixture 101 towards the upper fixed fixture 101, the abutting member 103 is fixed on the fixed fixture 101 through a bolt, an opening leaf 2 is installed on a rotating part 1022 of the rotating member 102, and the opening leaf 2 abuts against the abutting member 103; a linkage assembly 301 is arranged on one side of the opening sash 2, a lifting assembly 302 is arranged on a connecting rod of the linkage assembly 301, a lifting nut 3022 of the lifting assembly 302 is rotated to enable a lifting rod 3021 to rise, and meanwhile, a linkage rod 3014 is driven, so that a sliding column 3013 slides to a high position in a sliding groove 3012, the opening sash 2 is driven to be opened, and meanwhile, the folding gauze 9 is unfolded; the lifting nut 3022 of the lifting assembly 302 is rotated to lower the lifting rod 3021 and drive the linkage rod 3014, so that the sliding column 3013 slides to the lower position in the sliding slot 3012, the opening sash 2 is driven to close, and the folding gauze 9 is folded at the same time.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a curtain wall is opened a hanging system, includes installation mounting (1), installation mounting (1) is installed on fossil fragments (0), is provided with on installation mounting (1) and opens a (2), its characterized in that: open fan (2) one side and install opening and close mechanism (3), opening and close mechanism (3) including linkage subassembly (301) and lifting unit (302), linkage subassembly (301) sets firmly and opening fan (2) one side, lifting unit (302) sets firmly on linkage subassembly (301), and lifting unit (302) includes lifter (3021), and lifter (3021) pass installation mounting (1) downwardly extending to vertical lift on installation mounting (1), through adjusting lifting unit (302) and go up and down, the control is opened fan (2) and is opened and close.
2. The curtain wall opening sash hanging system as claimed in claim 1, wherein: screw thread (4) have been seted up to keeping away from linkage subassembly (301) one side on lifter (3021), and lifting unit (302) still includes lifting nut (3022), lifting nut (3022) rotate to set up on installation mounting (1), lifting nut (3022) and lifter (3021) threaded connection.
3. The curtain wall opening sash hanging system as claimed in claim 2, wherein: the lifting nut (3022) is a hand-screwed nut.
4. The curtain wall opening sash hanging system as claimed in claim 1, wherein: linkage subassembly (301) include deflector (3011), slide groove (3012), slide post (3013) and gangbar (3014), deflector (3011) sets firmly opening fan (2) one side, slide groove (3012) slope is seted up on deflector (3011), and slide groove (3012) are kept away from and are opened fan (2) one side and be higher than slide groove (3012) and be close to opening fan (2) one side, slide post (3013) slide and set up in slide groove (3012) to set up the direction along slide groove (3012) and slide, gangbar (3014) set firmly on slide post (3013), and gangbar (3014) are kept away from slide post (3013) one end and are fixed with lifter (3021).
5. The curtain wall opening sash hanging system as claimed in claim 1, wherein: installation mounting (1) is including mounting (101), rotation piece (102) and butt piece (103), mounting (101) have two, and two mounting (101) are fixed respectively on two adjacent fossil fragments (0) about, rotation piece (102) are installed in top mounting (101) fixing part (101) one side towards below, and rotation piece (102) are used for hanging to establish and open on to the messenger opens fan (2) and rotates, butt piece (103) are installed in below mounting (101) towards top mounting (101) one side, and butt piece (103) are used for the butt to open fan (2).
6. The curtain wall opening sash hanging system as claimed in claim 5, wherein: the rotating part (102) comprises a fixing part (1021) and a rotating part (1022), the fixing part (1021) is fixedly arranged on the fixing part (101), the rotating part (1022) is rotatably arranged on the fixing part (1021), and the opening fan (2) is fixedly arranged on the rotating part (1022).
7. The curtain wall opening sash hanging system as claimed in claim 6, wherein: the fixed portion (1021) is fixedly provided with a supporting plate (5), the rotating portion (1022) is fixedly provided with a supporting block (6), and when the opening fan (2) is closed, the supporting block (6) abuts against the supporting plate (5).
8. The curtain wall opening sash hanging system as claimed in claim 7, wherein: and a rubber pad (7) is arranged on the supporting plate (5).
9. The curtain wall opening sash hanging system as claimed in claim 5, wherein: two installed part (8) are all installed to mounting (101) one side of carrying on the back mutually, installed part (8) are used for installing the curtain.
10. The curtain wall opening sash hanging system as claimed in claim 5, wherein: a folding gauze (9) is arranged between the abutting piece (103) and the opening sash (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929261.4A CN110644879B (en) | 2019-09-29 | 2019-09-29 | Curtain wall opening sash hanging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929261.4A CN110644879B (en) | 2019-09-29 | 2019-09-29 | Curtain wall opening sash hanging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110644879A true CN110644879A (en) | 2020-01-03 |
| CN110644879B CN110644879B (en) | 2021-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910929261.4A Active CN110644879B (en) | 2019-09-29 | 2019-09-29 | Curtain wall opening sash hanging system |
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| Country | Link |
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| CN (1) | CN110644879B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2153005A (en) * | 1984-01-23 | 1985-08-14 | Truth Inc | Self-locking window operator |
| CN88210036U (en) * | 1988-01-13 | 1988-11-09 | 吴静宓 | Transom opening device |
| CN1590668A (en) * | 2004-06-17 | 2005-03-09 | 杜军桦 | Glass supporting method and structure of glass curtain wall |
| JP3715887B2 (en) * | 2000-12-14 | 2005-11-16 | 光男 坂本 | Torsion bar structure |
| CN100999978A (en) * | 2006-01-12 | 2007-07-18 | 朱成祥 | Method for combining screen window with sash |
| CN103803446A (en) * | 2012-11-15 | 2014-05-21 | 国家电网公司 | Supporting device |
| CN205400447U (en) * | 2016-03-29 | 2016-07-27 | 浙江倍特储粮设备科技有限公司 | Can automatic grain depot sealed window |
| CN207262100U (en) * | 2017-09-27 | 2018-04-20 | 车兴辉 | A kind of portable power communication maintenance personal lighting apparatus |
-
2019
- 2019-09-29 CN CN201910929261.4A patent/CN110644879B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2153005A (en) * | 1984-01-23 | 1985-08-14 | Truth Inc | Self-locking window operator |
| CN88210036U (en) * | 1988-01-13 | 1988-11-09 | 吴静宓 | Transom opening device |
| JP3715887B2 (en) * | 2000-12-14 | 2005-11-16 | 光男 坂本 | Torsion bar structure |
| CN1590668A (en) * | 2004-06-17 | 2005-03-09 | 杜军桦 | Glass supporting method and structure of glass curtain wall |
| CN100999978A (en) * | 2006-01-12 | 2007-07-18 | 朱成祥 | Method for combining screen window with sash |
| CN103803446A (en) * | 2012-11-15 | 2014-05-21 | 国家电网公司 | Supporting device |
| CN205400447U (en) * | 2016-03-29 | 2016-07-27 | 浙江倍特储粮设备科技有限公司 | Can automatic grain depot sealed window |
| CN207262100U (en) * | 2017-09-27 | 2018-04-20 | 车兴辉 | A kind of portable power communication maintenance personal lighting apparatus |
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| Publication number | Publication date |
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| CN110644879B (en) | 2021-07-06 |
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