CN108505901B - Large-span closed flexible folding door - Google Patents
Large-span closed flexible folding door Download PDFInfo
- Publication number
- CN108505901B CN108505901B CN201810553720.9A CN201810553720A CN108505901B CN 108505901 B CN108505901 B CN 108505901B CN 201810553720 A CN201810553720 A CN 201810553720A CN 108505901 B CN108505901 B CN 108505901B
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- truss
- pulleys
- trusses
- door
- fixedly connected
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- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- E06B3/48—Wings connected at their edges, e.g. foldable wings
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
-
- 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
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Gates (AREA)
Abstract
A large-span closed flexible folding door relates to the technical field of large-span doors. The vertical rail mechanisms are respectively and fixedly connected to the inner sides of the lower parts of the two truss columns, the two vertical rail mechanisms are respectively and fixedly connected to the inner sides of the two truss columns, the positions of the two vertical rail mechanisms are corresponding, a plurality of inner door rail trusses are distributed in a uniform array from the lower direction of the inner door rail trusses of the roof truss beam bottom truss, the two ends of the inner door rail trusses are located in the two vertical rail mechanisms, the vertical rail type vertical rail crane has the advantages of being high in strength, good in stability and the like, effectively improving the appearance of products, reducing the weight of a metal structure of the crane and greatly reducing the material cost.
Description
Technical Field
The invention relates to the technical field of large-span doors, in particular to a large-span closed flexible folding door.
Background
Along with the development of economy, people attach more and more importance to the environment, governments increase the force to treat environmental pollution, and large steel structure plants in heavy industries such as shipbuilding, military industry, heavy steel construction and the like all need to be provided with closed gates.
Conventional large span doors use frames made of iron or steel, which are heavy. The lifting mechanism of the gate is unstable after long-term use.
SUMMARY OF THE PATENT FOR INVENTION
The invention aims at overcoming the defects and shortcomings of the prior art, and provides a large-span closed flexible folding door which has the characteristics of high strength, good stability and the like and effectively improves the appearance of a product. By analyzing the mechanical properties of the truss structure beam and combining the loading characteristics of the closed flexible lifting folding door, a mechanical model of the metal structure is accurately established, the structural types and sections of the truss with the inner frame and the truss with the inner crosspiece in the door are accurately calculated, the weight of the metal structure of the crane is reduced, and the material cost is greatly reduced.
In order to achieve the above purpose, the invention adopts the following technical scheme: the lifting mechanism comprises a lifting mechanism 1, truss columns 2, truss bottom trusses 3, vertical guide rail mechanisms 4, inner bottom frame trusses 5, inner door crosspiece trusses 6, a frame running mechanism 7, pulley blocks 8 and distance-keeping ropes 9, wherein the upper sides of the two truss columns 2 are respectively and vertically fixedly connected to the left side and the right side of the truss bottom trusses 3, the inner bottom frame trusses 5 are vertically and fixedly connected to the inner sides of the lower portions of the two truss columns 2, the two vertical guide rail mechanisms 4 are respectively and fixedly connected to the inner sides of the two truss columns 2, the positions of the two vertical guide rail mechanisms 4 are corresponding, the inner door crosspiece trusses 6 are respectively and uniformly distributed in an array from the lower direction of the truss bottom trusses 3, the two ends of the inner door crosspiece trusses 6 are respectively positioned in the inner sides of the two vertical guide rail mechanisms 4, the distance-keeping ropes 9 are uniformly distributed on the inner sides of the two vertical guide rail mechanisms 4, the inner side of the inner door crosspiece trusses 9 are vertically and fixedly connected with the inner door crosspiece trusses 6, the lifting mechanism 1 is fixedly connected to the right above the truss bottom trusses 3, and the frame running mechanism 7 is fixedly connected to the inner door crosspiece trusses 6 and the inner door crosspiece trusses 7 through the distance-keeping ropes 6.
The lifting mechanism 1 comprises a motor 11, a shaft coupling 12, a brake 13, a speed reducer 14, winding drums 15 and steel wire ropes 16, wherein the two shaft couplings 12 are respectively and fixedly connected to shafts on the left side and the right side of the motor 11, the two brakes 13 are in transmission connection with the motor 11 through the two shaft couplings 12, the two speed reducers 14 are respectively connected to the other sides of the two brakes 13, the two winding drums 15 are respectively connected to the front surfaces of the two speed reducers 14, the positions of the two winding drums 15 are corresponding, and the two steel wire ropes 16 are respectively wound on the two winding drums 15.
The pulley block 8 comprises balance pulleys 81, fixed pulleys 82, guide pulleys 83 and movable pulleys 84, wherein the two balance pulleys 81 are respectively positioned at the left side and the right side of the roof truss girder bottom truss 3, the two guide pulleys 83 are respectively positioned at the left side and the right side of the two reels 15, four fixed pulleys 82 are correspondingly positioned between the two balance pulleys 81 and the two guide pulleys 83 in pairs, and the four movable pulleys 84 are respectively positioned under the gap between the two balance pulleys 81 and the fixed pulleys 82 and under the gap between the two guide pulleys 83 and the fixed pulleys 82. The aim of stable running of the truss guide wheel group in the door in the vertical guide rail mechanism is ensured. The disc spring compensation method is adopted to connect with the door main body structure, and the structural deformation caused by temperature difference is overcome.
The two steel wire ropes 16 are respectively wound around four fixed pulleys 82, two guide pulleys 83 and four movable pulleys 84, and the other ends of the two steel wire ropes 16 are fixedly connected with two balance pulleys 81.
The truss upright post 2, the roof truss beam bottom truss 3, the vertical guide rail mechanism 4, the door inner bottom frame truss 5, the door inner crosspiece truss 6 and the frame running mechanism 7 are all members made of aluminum alloy materials. The truss structure is designed to be a truss structure frame welded by aluminum alloy sections, and the truss structure is symmetrical in structure, good in stability, and is designed to be a closed flexible lifting folding door main structure through accurate calculation and reasonable design and combination, so that the truss structure has the characteristics of high strength, good stability and the like, and the appearance of a product is effectively improved. By analyzing the mechanical properties of the truss structure beam and combining the loading characteristics of the closed flexible lifting folding door, a mechanical model of the metal structure is accurately established, the structural types and sections of the truss with the inner frame and the truss with the inner crosspiece in the door are accurately calculated, the weight of the metal structure of the crane is reduced, and the material cost is greatly reduced.
The distance between the inner crosspiece trusses 6 of the doors is 1500cm, and PVC fabrics are arranged on the inner side and the outer side of the inner crosspiece trusses 6 of the doors.
The balance pulley 81, the fixed pulley 82 and the guide pulley 83 are all positioned at the same horizontal position. The running synchronism of the frame running mechanism 7 in the vertical rail mechanism 4 can be ensured. The horizontal placement of the truss in the door in the vertical guide rail mechanism is satisfied by utilizing a four-point lifting three-point balance principle.
And a plurality of supporting reinforcing ribs 10 are arranged on the truss upright posts 2, the roof truss beam bottom trusses 3 and the door inner bottom frame trusses 5. In the structural design process, the condition that the overhanging surface of the structural body is overlarge or the span is overlarge may occur, and in such a condition, the load born by the connecting surface of the structural member is limited, and then a reinforcing rib is added on the common vertical surface of the two combined bodies so as to increase the strength of the combined surface.
After the technical scheme is adopted, the beneficial effects of the invention are as follows: the product has the characteristics of high strength, good stability and the like, and effectively improves the appearance of the product. By analyzing the mechanical properties of the truss structure beam and combining the loading characteristics of the closed flexible lifting folding door, a mechanical model of the metal structure is accurately established, the structural types and sections of the truss with the inner frame and the truss with the inner crosspiece in the door are accurately calculated, the weight of the metal structure of the crane is reduced, and the material cost is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural view of a lifting mechanism 1 in the patent of the invention;
fig. 3 is a schematic illustration of the connection of the wire rope 16 and the pulley block 8 in the present patent.
Reference numerals illustrate: the lifting mechanism 1, the truss upright post 2, the roof truss girder bottom truss 3, the vertical guide rail mechanism 4, the door inner bottom frame truss 5, the door inner crosspiece truss 6, the frame running mechanism 7, the pulley block 8, the distance keeping rope 9, the motor 11, the coupling 12, the brake 13, the speed reducer 14, the winding drum 15, the steel wire rope 16, the balance pulley 81, the fixed pulley 82, the guide pulley 83 and the movable pulley 84.
Detailed Description
Referring to fig. 1-3, the technical scheme adopted in the specific embodiment is as follows: the lifting mechanism comprises a lifting mechanism 1, truss columns 2, truss bottom trusses 3, vertical guide rail mechanisms 4, inner bottom frame trusses 5, inner door crosspiece trusses 6, a frame running mechanism 7, pulley blocks 8 and distance-keeping ropes 9, wherein the upper sides of the two truss columns 2 are respectively and vertically fixedly connected to the left side and the right side of the truss bottom trusses 3, the inner bottom frame trusses 5 are vertically and fixedly connected to the inner sides of the lower portions of the two truss columns 2, the two vertical guide rail mechanisms 4 are respectively and fixedly connected to the inner sides of the two truss columns 2, the positions of the two vertical guide rail mechanisms 4 are corresponding, the inner door crosspiece trusses 6 are respectively and uniformly distributed in an array from the lower direction of the truss bottom trusses 3, the two ends of the inner door crosspiece trusses 6 are respectively positioned in the inner sides of the two vertical guide rail mechanisms 4, the distance-keeping ropes 9 are uniformly distributed on the inner sides of the two vertical guide rail mechanisms 4, the inner side of the inner door crosspiece trusses 9 are vertically and fixedly connected with the inner door crosspiece trusses 6, the lifting mechanism 1 is fixedly connected to the right above the truss bottom trusses 3, and the frame running mechanism 7 is fixedly connected to the inner door crosspiece trusses 6 and the inner door crosspiece trusses 7 through the distance-keeping ropes 6.
The lifting mechanism 1 comprises a motor 11, a shaft coupling 12, a brake 13, a speed reducer 14, winding drums 15 and steel wire ropes 16, wherein the two shaft couplings 12 are respectively and fixedly connected to shafts on the left side and the right side of the motor 11, the two brakes 13 are in transmission connection with the motor 11 through the two shaft couplings 12, the two speed reducers 14 are respectively connected to the other sides of the two brakes 13, the two winding drums 15 are respectively connected to the front surfaces of the two speed reducers 14, the positions of the two winding drums 15 are corresponding, and the two steel wire ropes 16 are respectively wound on the two winding drums 15.
The pulley block 8 comprises balance pulleys 81, fixed pulleys 82, guide pulleys 83 and movable pulleys 84, wherein the two balance pulleys 81 are respectively positioned at the left side and the right side of the roof truss girder bottom truss 3, the two guide pulleys 83 are respectively positioned at the left side and the right side of the two reels 15, four fixed pulleys 82 are correspondingly positioned between the two balance pulleys 81 and the two guide pulleys 83 in pairs, and the four movable pulleys 84 are respectively positioned under the gap between the two balance pulleys 81 and the fixed pulleys 82 and under the gap between the two guide pulleys 83 and the fixed pulleys 82. The aim of stable running of the truss guide wheel group in the door in the vertical guide rail mechanism is ensured. The disc spring compensation method is adopted to connect with the door main body structure, and the structural deformation caused by temperature difference is overcome.
The two steel wire ropes 16 are respectively wound around four fixed pulleys 82, two guide pulleys 83 and four movable pulleys 84, and the other ends of the two steel wire ropes 16 are fixedly connected with two balance pulleys 81.
The truss upright post 2, the roof truss beam bottom truss 3, the vertical guide rail mechanism 4, the door inner bottom frame truss 5, the door inner crosspiece truss 6 and the frame running mechanism 7 are all members made of aluminum alloy materials. The truss structure is designed to be a truss structure frame welded by aluminum alloy sections, and the truss structure is symmetrical in structure, good in stability, and is designed to be a closed flexible lifting folding door main structure through accurate calculation and reasonable design and combination, so that the truss structure has the characteristics of high strength, good stability and the like, and the appearance of a product is effectively improved. By analyzing the mechanical properties of the truss structure beam and combining the loading characteristics of the closed flexible lifting folding door, a mechanical model of the metal structure is accurately established, the structural types and sections of the truss with the inner frame and the truss with the inner crosspiece in the door are accurately calculated, the weight of the metal structure of the crane is reduced, and the material cost is greatly reduced.
The distance between the inner crosspiece trusses 6 of the doors is 1500cm, and PVC fabrics are arranged on the inner side and the outer side of the inner crosspiece trusses 6 of the doors.
The balance pulley 81, the fixed pulley 82 and the guide pulley 83 are all positioned at the same horizontal position. The running synchronism of the frame running mechanism 7 in the vertical rail mechanism 4 can be ensured. The horizontal placement of the truss in the door in the vertical guide rail mechanism is satisfied by utilizing a four-point lifting three-point balance principle.
And a plurality of supporting reinforcing ribs 10 are arranged on the truss upright posts 2, the roof truss beam bottom trusses 3 and the door inner bottom frame trusses 5. In the structural design process, the condition that the overhanging surface of the structural body is overlarge or the span is overlarge may occur, and in such a condition, the load born by the connecting surface of the structural member is limited, and then a reinforcing rib is added on the common vertical surface of the two combined bodies so as to increase the strength of the combined surface.
The working principle of the invention is as follows: the truss upright post 2, the roof truss girder bottom truss 3, the vertical guide rail mechanism 4, the door inner bottom frame truss 5, the door inner crosspiece truss 6 and the frame running mechanism 7 are all made of aluminum alloy materials, aluminum alloy sections are designed to be used as main components of the door inner truss structure, a mechanical model of the truss structure is accurately built by analyzing the mechanical properties of the aluminum alloy sections and combining the loading characteristics of the door inner truss, the type and the section of an upper chord member, a lower chord member, a web member and a horizontal brace rod of the door inner truss are accurately calculated, the weight of the door inner truss metal structure is reasonably determined, the material cost is greatly reduced, in order to solve the synchronization problem of the frame running mechanism, a multi-multiplying power scattered arrangement method is adopted by a pulley transmission system, two steel wire ropes 16 are respectively wound on four fixed pulleys 82, two guide pulleys 83 and four movable pulleys 84, the other ends of the two steel wire ropes 16 are fixedly connected with two balance pulleys 81, the synchronization problem of a lifting process is solved, and the horizontal placement of the door inner truss in the vertical guide rail mechanism is satisfied by utilizing a four-point lifting three-point balance principle.
After the technical scheme is adopted, the beneficial effects of the invention are as follows: the product has the characteristics of high strength, good stability and the like, and effectively improves the appearance of the product. By analyzing the mechanical properties of the truss structure beam and combining the loading characteristics of the closed flexible lifting folding door, a mechanical model of the metal structure is accurately established, the structural types and sections of the truss with the inner frame and the truss with the inner crosspiece in the door are accurately calculated, the weight of the metal structure of the crane is reduced, and the material cost is greatly reduced.
The foregoing is merely for illustrating the technical solution of the present invention and is not intended to be limiting, and other modifications and equivalents of the technical solution of the present invention by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (1)
1. A closed flexible folding door of large-span, its characterized in that: the lifting mechanism comprises a lifting mechanism (1), truss columns (2), truss bottom trusses (3), vertical guide rail mechanisms (4), an inner door frame truss (5), inner door crosspiece trusses (6), a frame running mechanism (7), pulley blocks (8) and distance-keeping ropes (9), wherein the upper sides of the two truss columns (2) are respectively and vertically fixedly connected to the left side and the right side of the truss bottom trusses (3), the inner door frame trusses (5) are vertically and fixedly connected to the inner sides of the lower parts of the two truss columns (2), the two vertical guide rail mechanisms (4) are respectively and fixedly connected to the inner sides of the two truss columns (2), the positions of the two vertical guide rail mechanisms (4) correspond to each other, a plurality of inner door crosspiece trusses (6) are respectively and uniformly distributed in an array from the lower direction of the inner door frame truss bottom trusses (3), the two ends of the inner door crosspiece trusses (6) are respectively positioned in the two vertical guide rail mechanisms (4), a plurality of distance-keeping ropes (9) are uniformly distributed on the inner sides of the two vertical guide rail mechanisms (4), a plurality of the distance-keeping ropes (9) are respectively and vertically and fixedly connected to the inner door truss bottom trusses (6) through the vertical guide rail mechanisms (6) in the vertical direction, the inner door crosspiece trusses (6) are fixedly connected to the inner door truss bottom trusses (3 through the door frame structures (6), the pulley block (8) is fixedly connected to the roof truss girder bottom truss (3) and the frame running mechanism (7), the lifting mechanism (1) comprises a motor (11), a coupler (12), a brake (13), a speed reducer (14), a winding drum (15) and a steel wire rope (16), the two couplers (12) are respectively and fixedly connected to shafts on the left side and the right side of the motor (11), the two brakes (13) are in transmission connection with the motor (11) through the two couplers (12), the two speed reducers (14) are respectively connected to the other side of the two brakes (13), the two winding drums (15) are respectively connected to the front sides of the two speed reducers (14), the positions of the two winding drums (15) are corresponding, the two steel wire ropes (16) are respectively wound on the two winding drums (15), the pulley block (8) comprises a balance pulley (81), a fixed pulley (82), a guide pulley (83) and a movable pulley (84), the two balance pulleys (81) are respectively positioned on the left side and the right side of the roof truss girder bottom truss girder, the two guide pulleys (83) are respectively positioned between the two guide pulleys (82) and the two guide pulleys (83) which are respectively positioned on the left side and the right side of the two guide pulleys (82) respectively, four movable pulleys (84) are located under the clearance between two balance pulleys (81) and fixed pulleys (82) respectively and under the clearance between two guide pulleys (83) and fixed pulleys (82), two wire ropes (16) wrap up four fixed pulleys (82), two guide pulleys (83), four movable pulleys (84) respectively, and the other end fixed connection of two wire ropes (16) is in two balance pulleys (81), truss stand (2), roof truss girder bottom truss (3), vertical guide rail mechanism (4), in-door truss (5), in-door truss (6), frame running gear (7) are the component that aluminum alloy material made, the distance between in-door truss (6) of a plurality of be 1500cm, the inside and outside both sides of in-door truss (6) all be provided with PVC surface fabric, balance pulleys (81), fixed pulleys (82), guide pulleys (83) all on same horizontal position, truss stand (2), roof truss bottom truss (3), in-door truss (5) on all be provided with a plurality of trusses (10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810553720.9A CN108505901B (en) | 2018-06-01 | 2018-06-01 | Large-span closed flexible folding door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810553720.9A CN108505901B (en) | 2018-06-01 | 2018-06-01 | Large-span closed flexible folding door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108505901A CN108505901A (en) | 2018-09-07 |
| CN108505901B true CN108505901B (en) | 2024-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810553720.9A Active CN108505901B (en) | 2018-06-01 | 2018-06-01 | Large-span closed flexible folding door |
Country Status (1)
| Country | Link |
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| CN (1) | CN108505901B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641643B (en) * | 2023-07-27 | 2023-10-31 | 沈阳宝通门业有限公司 | Large-scale polylith lift gate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1434188A (en) * | 2002-01-25 | 2003-08-06 | 中谷寿麿 | Sash system having doors being openable and closable by sliding and folding |
| CN2592828Y (en) * | 2002-12-12 | 2003-12-17 | 江苏金秋竹门业有限公司 | Superimposed door |
| CN201202368Y (en) * | 2008-05-21 | 2009-03-04 | 杭州西子石川岛停车设备有限公司 | Elevating type automatic door |
| CN201362566Y (en) * | 2009-03-18 | 2009-12-16 | 太原重工股份有限公司 | Hoisting mechanism of planet three-grade reducer of casting crane |
| CN208456398U (en) * | 2018-06-01 | 2019-02-01 | 江苏格雷特起重机械有限公司 | A kind of large span closed type flexible folding door |
-
2018
- 2018-06-01 CN CN201810553720.9A patent/CN108505901B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1434188A (en) * | 2002-01-25 | 2003-08-06 | 中谷寿麿 | Sash system having doors being openable and closable by sliding and folding |
| CN2592828Y (en) * | 2002-12-12 | 2003-12-17 | 江苏金秋竹门业有限公司 | Superimposed door |
| CN201202368Y (en) * | 2008-05-21 | 2009-03-04 | 杭州西子石川岛停车设备有限公司 | Elevating type automatic door |
| CN201362566Y (en) * | 2009-03-18 | 2009-12-16 | 太原重工股份有限公司 | Hoisting mechanism of planet three-grade reducer of casting crane |
| CN208456398U (en) * | 2018-06-01 | 2019-02-01 | 江苏格雷特起重机械有限公司 | A kind of large span closed type flexible folding door |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108505901A (en) | 2018-09-07 |
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