CN115650016A - Weight-free elevator landing door system and elevator - Google Patents
Weight-free elevator landing door system and elevator Download PDFInfo
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- CN115650016A CN115650016A CN202211326804.1A CN202211326804A CN115650016A CN 115650016 A CN115650016 A CN 115650016A CN 202211326804 A CN202211326804 A CN 202211326804A CN 115650016 A CN115650016 A CN 115650016A
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- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 35
- 239000010959 steel Substances 0.000 description 35
- 230000003139 buffering effect Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a heavy hammer-free elevator landing door system and an elevator, which comprise a sill-loading assembly, wherein the sill-loading assembly comprises a left guide rail and a right guide rail which are symmetrically arranged along the transverse direction, and a left hanging plate and a right hanging plate are respectively arranged on the left guide rail and the right guide rail in a sliding fit manner, wherein the left guide rail and the right guide rail are obliquely arranged, and the adjacent end of the left guide rail and the right guide rail is lower than the deviated end in the vertical direction; the guide rail directional support is also provided with cushion pads on the end faces of two sides close to the left guide rail and the right guide rail, and further comprises a linkage assembly, so that the left hanging plate and the right hanging plate can be synchronously close to or far away from each other. The door plate assembly can be closed inwards by means of dead weight by arranging the inclined left guide rail and the inclined right guide rail and further adopting the arc-shaped guide rail, and meanwhile, the left door plate and the right door plate can be ensured to be synchronous when being opened and closed by arranging the linkage assembly, so that the door plate assembly is more stable and soft in the closing process, and the closing effect of the landing door is improved.
Description
Technical Field
The invention relates to the technical field of elevator equipment, in particular to a heavy-hammer-free elevator landing door system and an elevator.
Background
Elevator landing door, also called hall door, elevator landing door device is the part that the normal opening of elevator landing door was guaranteed to elevator landing door of lug connection, current elevator landing door device generally includes the sill subassembly of going up of installing on elevator landing door opening upper portion and installs the sill subassembly in the door opening lower part, the door plant subassembly of elevator landing door is installed between sill subassembly and sill subassembly, when the elevator is flat bed, elevator sedan-chair door is opened, door leaf subassembly through door sword subassembly on the sedan-chair door and the door ball subassembly on the landing door cooperate the door and drive elevator landing door opens to both sides, for keeping elevator landing door effectively closed after elevator car leaves at the weight, the design has the weight subassembly on the current elevator landing door device, rely on the gravity of weight subassembly to keep elevator hall door in the closure state, and the glass door that a lot of present sightseeing elevators all adopt, can see the weight subassembly through transparent sightseeing panel during the use, very big influence sightseeing nature, and the landing door device structure that has the weight subassembly is complicated, and the cost is higher.
Chinese patent CN110054067A discloses an elevator landing door device and elevator, and elevator landing door device includes: the door upper bank comprises a guide rail and a door hanging plate mechanism movably matched with the guide rail, the guide rail comprises a first guide section, a second guide section and a third guide section, and two ends of the second guide section are respectively connected with the first guide section and the third guide section; the landing door is connected with the door hanging plate mechanism; wherein, first direction section is compared in the third direction section more near in the avris of elevator layer door gear, and when door link plate mechanism and first direction section contact, door link plate mechanism has the trend towards the motion of second direction section, and first direction section is higher than third direction section, and the height of second direction section is degressive from the one end that is close to first direction section to the one end that is close to third direction section. The elevator comprises an elevator landing door arrangement as described above. Although this patent has succeeded in getting rid of the weight subassembly, the structural design of its guide rail makes the layer door when closing, closing speed can form the sudden change, on the one hand the door plant falls suddenly obliquely and can produce the noise that makes the passenger uncomfortable, on the other hand also can cause the harm to other subassemblies of elevator, consequently this patent has set up shock-absorbing component in the link plate below and has eliminated the impact of door plant vertical motion, but it can not solve the impact of the horizontal direction that brings because of the sudden change of layer door closing speed, do not solve simultaneously and how to make the more steady soft closing of layer door yet, in order to improve user experience.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: the utility model provides a no weight elevator landing door system and elevator has solved current landing door device and has had the weight subassembly, especially to transparent elevators such as sightseeing elevator, and the weight subassembly influences light viewing nature and structure complicacy, and the cost is higher, and the landing door speed of closing problem not steady enough and soft.
In order to solve the technical problems, the invention adopts the following technical scheme:
a heavy hammer-free elevator landing door system comprises a sill-mounting assembly, wherein the sill-mounting assembly comprises a left guide rail and a right guide rail which are distributed in the transverse direction and symmetrically arranged, and a left hanging plate and a right hanging plate are respectively installed on the left guide rail and the right guide rail in a sliding fit manner; the left guide rail and the right guide rail are obliquely arranged, and one adjacent ends of the left guide rail and the right guide rail are lower than the opposite ends in the vertical direction;
the upper sill assembly further comprises a back plate arranged along the horizontal direction, and a guide rail directional support is arranged in the middle of the back plate; the left guide rail and the right guide rail are both arranged on the back plate; the one end that left side guide rail and right guide rail deviate from mutually is connected with the backplate, and adjacent one end all is connected with the guide rail orientation support, wherein, the slot that the slant set up is all seted up to the both sides that the guide rail orientation support is close to left guide rail and right guide rail, the tip of left side guide rail and right guide rail stretch into in the slot and with guide rail orientation support fixed connection.
Buffer pads are further arranged on the end faces of the two sides of the guide rail directional support, which are close to the left guide rail and the right guide rail, and the adjacent ends of the left guide rail and the right guide rail can be respectively contacted with the buffer pads on the two sides of the guide rail directional support;
the linkage assembly is connected with the left hanging plate and the right hanging plate respectively, so that the left hanging plate and the right hanging plate can be synchronously close to or far away from each other.
Preferably, the axes of the left guide rail and the right guide rail are concave arcs, the curvature radius of the end, deviating from the left guide rail and the right guide rail, of the left guide rail and the right guide rail is smaller than that of the adjacent end of the left guide rail and the right guide rail, and the included angle between the tangent line of the adjacent end of the left guide rail and the right guide rail and the horizontal plane is upwards inclined and is larger than 0 degree; the left hanging plate and the right hanging plate both comprise bearing plates arranged horizontally, a group of roller assemblies are arranged in the middle of each bearing plate, the bearing plates can rotate around the rotation centers of the roller assemblies, and the roller assemblies on the left hanging plate and the right hanging plate are connected with the left guide rail and the right guide rail in a sliding fit mode respectively.
Preferably, the linkage assembly comprises a left guide wheel and a right guide wheel which are arranged at two ends of the back plate, a steel wire rope adjusting support fixed on the left hanging plate, a steel wire rope fixing support fixed on the right hanging plate, a first steel wire rope and a second steel wire rope, wherein one end of the first steel wire rope is connected with the steel wire rope fixing support, the other end of the first steel wire rope is connected with the steel wire rope adjusting support after bypassing the right guide wheel, one end of the second steel wire rope is connected with the steel wire rope fixing support, and the other end of the second steel wire rope is connected with the steel wire rope adjusting support after bypassing the left guide wheel.
Preferably, the steel wire rope adjusting support comprises a supporting support fixedly connected with the back plate, adjusting bolts are in threaded fit with the left side and the right side of the supporting support, and two ends of the first steel wire rope and the second steel wire rope are respectively connected with the adjusting bolts on two sides of the supporting support.
As optimization, the door panel assembly comprises a left door panel and a right door panel, and the left hanging plate and the right hanging plate are respectively connected with the left door panel and the right door panel; the lower end of the left door plate and the lower end of the right door plate are correspondingly provided with sliding plates extending downwards, and the sliding plates extend into the sliding grooves and are in sliding fit connection with the sliding plates.
Preferably, a plurality of sliding blocks are distributed on the sliding plate along the length direction of the sliding plate, the sliding blocks are distributed on two sides of the sliding plate along the thickness direction, and the sliding blocks are connected with the sliding grooves in a sliding fit mode.
Preferably, the height of the sliding plate inserting chute part is larger than the height difference of two ends of the left guide rail or the right guide rail along the vertical direction.
Based on the heavy punch-free elevator landing door system, the invention further provides an elevator which comprises the elevator landing door system.
Compared with the prior art, the application has the following beneficial effects:
according to the invention, the door panel assembly can be closed inwards by means of self weight through the inclined left guide rail and the inclined right guide rail, a heavy hammer assembly is not needed to provide self-closing force, and meanwhile, the left door panel and the right door panel can be ensured to be synchronous in opening and closing through the arrangement of the linkage assembly, so that the closing effect of the landing door is improved. In addition, the inclination angle of the guide rail is limited by arranging the fixed guide rail directional support, the door can be conveniently selected or adjusted according to different door opening widths or the dead weight of the door plate, the universality is good, the maintenance is convenient, buffering cushions playing a role of buffering in the horizontal direction are arranged on two sides of the guide rail directional support, and the landing door is more stable and soft when being closed due to the adoption of the left guide rail and the right guide rail with non-continuous radians, so that the landing door cannot generate a larger impact effect, the experience effect is good, and the service life is long.
Drawings
FIG. 1 is a schematic structural view of a door closed state according to the present invention;
fig. 2 is a schematic view of a matching structure of the sill assembly and the door panel assembly;
FIG. 3 is a schematic structural diagram illustrating the door open state of the present invention;
in the figure, 1 left guide rail, 2 right guide rail, 3 left hanging plate, 4 right hanging plate, 5 door panel components, 6 back plates, 7 guide rail directional supports, 8 left guide wheels, 9 right guide wheels, 10 steel wire rope adjusting supports, 11 steel wire rope fixing supports, 12 first steel wire ropes, 13 sill components, 14 sliding grooves, 15 sliding plates, 16 sliding blocks, 17 second steel wire ropes, 18 buffer pads and 19 roller components.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the specific implementation: with reference to figures 1-3 of the drawings,
the embodiment of the invention provides a heavy hammer-free elevator landing door system, which comprises a landing sill assembly arranged above a landing door opening, wherein the landing sill assembly comprises a left guide rail 1 and a right guide rail 2 which are transversely distributed and symmetrically arranged, and a back plate 6 which is horizontally arranged and arranged above the landing door opening, a left hanging plate 3 and a right hanging plate 4 are respectively arranged on the left guide rail 1 and the right guide rail 2 in a sliding fit manner, the left guide rail 1 and the right guide rail 2 are obliquely arranged, and the adjacent ends of the left guide rail 1 and the right guide rail 2 are lower than the deviated ends in the vertical direction; still include the linkage subassembly, the linkage subassembly is connected with left link plate 3 and right link plate 4 respectively, makes left link plate 3 and right link plate 4 can be close to each other or keep away from in step.
The left guide rail 1 and the right guide rail 2 are both arranged on a back plate 6; wherein, the one end that left side guide rail 1 and right guide rail 2 deviate from mutually is connected with backplate 6, and adjacent one end all is connected with the guide rail directional support 7 of fixing at backplate 6 middle part, the slot that the slant set up is all seted up to the both sides of guide rail directional support 7, the one end that left side guide rail 1 and right guide rail 2 are relative stretch into in the slot and with guide rail directional support 7 fixed connection, like this, according to the width of opening the door of difference and door plant dead weight choose guide rail directional support 7 who has the slot of different inclination for use to just injecing the inclination of guide rail after left guide rail 1 and right guide rail 2 insert this slot, then with guide rail directional support 7 fixed mounting on backplate 6.
Through the structure, after the layer door is opened, the bearing plate automatically closes to the inboard along curved left guide rail 1 and right guide rail 2 through roller components under the action of gravity of door plant to closing the in-process, closing speed is by big to little steady transition, and when being close to closing completely, closing speed can reduce the minimum, and simultaneously with the help of the buffering shock attenuation of blotter 18 again, make closing of layer door more steady soft, improved user experience.
The linkage assembly comprises a left guide wheel 8 and a right guide wheel 9 which are arranged at two ends of a back plate 6, a steel wire rope adjusting support 10 fixed on a left hanging plate 3, a steel wire rope fixing support 11 fixed on a right hanging plate 4, a first steel wire rope 12 and a second steel wire rope 17, wherein one end of the first steel wire rope 12 is connected with the steel wire rope fixing support 11, the other end of the first steel wire rope is connected with the steel wire rope adjusting support 10 after bypassing the right guide wheel 9, one end of the second steel wire rope 17 is connected with the steel wire rope fixing support 11, and the other end of the second steel wire rope is connected with the steel wire rope adjusting support 10 after bypassing the left guide wheel 8. The steel wire rope adjusting support 10 comprises a supporting support fixedly connected with the back plate 6, adjusting bolts are in threaded fit with the left side and the right side of the supporting support, two ends of the first steel wire rope 12 and two ends of the second steel wire rope 17 are connected with the adjusting bolts on the two sides of the supporting support respectively, and the tensioning degree of the steel wire ropes can be adjusted by rotating the adjusting bolts. In addition, other transmission modes or electric modes, such as gear set transmission or a plurality of modes such as a double-shaft motor, can be adopted to realize the synchronous movement of the left hanging plate 3 and the right hanging plate 4.
The door panel assembly 5 comprises a left door panel and a right door panel, and the left hanging plate 3 and the right hanging plate 4 are respectively connected with the left door panel and the right door panel; the door sill further comprises a sill assembly 13 corresponding to the upper sill assembly, the section of the sill assembly 13 is rectangular, a sliding groove 14 extending along the length of the sill assembly is formed in the upper side of the sill assembly 13, correspondingly, sliding plates 15 extending downwards are arranged at the lower ends of the left door plate and the right door plate, and the sliding plates 15 extend into the sliding groove 14 and are connected with the sliding groove 14 in a sliding fit mode.
A plurality of sliding blocks 16 are distributed on the sliding plate 15 along the length direction of the sliding plate, the sliding blocks 16 are distributed on two sides of the sliding plate 15 along the thickness direction, and the sliding blocks 16 are connected with the sliding grooves 14 in a sliding fit mode. Specifically, the sliding block 16 can also adopt a structure such as a roller or be arranged in a full length mode, and the abrasion of the sliding plate 15 is reduced, wherein the full length mode can also effectively prevent dust from entering the sliding groove 14, so that the maintenance and the cleaning are further facilitated, and the durability is improved.
The height of the sliding plate 15 inserted into the sliding slot 14 is greater than the height difference of the two ends of the left guide rail 1 or the right guide rail 2 along the vertical direction, so that the sliding plate 15 is prevented from separating from the sliding slot 14 to bring safety risk when the door panel moves along the oblique guide rail.
Based on the elevator landing door system, the invention further provides an elevator, which comprises the elevator landing door system.
According to the invention, the door panel assembly can be closed inwards by virtue of self weight by arranging the inclined left guide rail and the inclined right guide rail, a heavy hammer assembly is not needed to provide self-closing force, and meanwhile, the left door panel and the right door panel can be ensured to be synchronous in opening and closing by arranging the linkage assembly, so that the closing effect of the landing door is improved. In addition, the inclination angle of the guide rail is limited by arranging the fixed guide rail directional support, the door can be conveniently selected or adjusted according to different door opening widths or the dead weight of the door plate, the universality is good, the maintenance is convenient, buffering cushions playing a role of buffering in the horizontal direction are arranged on two sides of the guide rail directional support, and the landing door is more stable and soft when being closed due to the adoption of the left guide rail and the right guide rail with non-continuous radians, so that the landing door cannot generate a larger impact effect, the experience effect is good, and the service life is long.
Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents, and thus the embodiments of the present invention are to be considered as illustrative examples of the invention, and not restrictive in any sense.
Claims (8)
1. The elevator landing door system without the heavy hammer is characterized by comprising an upper sill assembly, wherein the upper sill assembly comprises a left guide rail and a right guide rail which are distributed transversely and symmetrically, and a left hanging plate and a right hanging plate are respectively installed on the left guide rail and the right guide rail in a sliding fit manner; the left guide rail and the right guide rail are obliquely arranged, and one adjacent ends of the left guide rail and the right guide rail are lower than the opposite ends in the vertical direction;
the upper sill component also comprises a back plate arranged along the horizontal direction, and the middle part of the back plate is provided with a guide rail directional bracket; the left guide rail and the right guide rail are both arranged on the back plate; the end, which is far away from the left guide rail and the right guide rail, of the guide rail is connected with the back plate, and the adjacent end of the guide rail is connected with the guide rail orienting bracket, wherein two sides, which are close to the left guide rail and the right guide rail, of the guide rail orienting bracket are respectively provided with an obliquely arranged slot, and the end parts of the left guide rail and the right guide rail extend into the slots and are fixedly connected with the guide rail orienting bracket;
buffer pads are further arranged on the end faces of the two sides of the guide rail directional support, which are close to the left guide rail and the right guide rail, and the adjacent ends of the left guide rail and the right guide rail can be respectively contacted with the buffer pads on the two sides of the guide rail directional support;
the linkage assembly is connected with the left hanging plate and the right hanging plate respectively, so that the left hanging plate and the right hanging plate can be synchronously close to or far away from each other.
2. The elevator landing door system without a heavy hammer as claimed in claim 1, wherein the axes of the left and right guide rails are concavely curved, the radius of curvature of the end of the left and right guide rails away from each other is smaller than that of the adjacent end, and the included angle between the tangent line of the adjacent end of the left and right guide rails and the horizontal plane is inclined upward and is greater than 0 °; the left hanging plate and the right hanging plate both comprise bearing plates arranged horizontally, a group of roller assemblies are arranged in the middle of each bearing plate, the bearing plates can rotate around the rotation centers of the roller assemblies, and the roller assemblies on the left hanging plate and the right hanging plate are connected with the left guide rail and the right guide rail in a sliding fit mode respectively.
3. The elevator landing door system without heavy hammer as claimed in claim 1 or 2, wherein the linkage assembly comprises a left guide wheel and a right guide wheel disposed at both ends of the back plate, a wire rope adjusting bracket fixed to the left hanging plate, a wire rope fixing bracket fixed to the right hanging plate, a first wire rope and a second wire rope, wherein one end of the first wire rope is connected to the wire rope fixing bracket, the other end of the first wire rope is connected to the wire rope adjusting bracket after passing around the right guide wheel, one end of the second wire rope is connected to the wire rope fixing bracket, and the other end of the second wire rope is connected to the wire rope adjusting bracket after passing around the left guide wheel.
4. The elevator landing door system without heavy punch of claim 3, wherein the wire rope adjusting bracket comprises a fixed bracket fixedly connected to the back plate, adjusting bolts are screwed on the left and right sides of the fixed bracket, and the two ends of the first and second wire ropes are respectively connected to the adjusting bolts on the two sides of the fixed bracket.
5. The elevator landing door system without the heavy hammer as claimed in claim 3, further comprising a door panel assembly, wherein the door panel assembly comprises a left door panel and a right door panel, and the left hanging plate and the right hanging plate are respectively connected with the left door panel and the right door panel; the lower end of the left door plate and the lower end of the right door plate are correspondingly provided with sliding plates extending downwards, and the sliding plates extend into the sliding grooves and are in sliding fit connection with the sliding plates.
6. The elevator landing door system without heavy punch as claimed in claim 5, wherein a plurality of sliding blocks are distributed on the sliding plate along the length direction thereof, the sliding blocks are distributed on both sides of the sliding plate along the thickness direction thereof, and the sliding blocks are connected with the sliding grooves in a sliding fit manner.
7. The elevator landing door system without heavy hammer of claim 5, wherein the height of the sliding plate insertion chute portion is greater than the vertical height difference between the ends of the left or right guide rail.
8. An elevator, characterized in that it comprises a weightless elevator landing door system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326804.1A CN115650016A (en) | 2022-10-27 | 2022-10-27 | Weight-free elevator landing door system and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326804.1A CN115650016A (en) | 2022-10-27 | 2022-10-27 | Weight-free elevator landing door system and elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115650016A true CN115650016A (en) | 2023-01-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211326804.1A Withdrawn CN115650016A (en) | 2022-10-27 | 2022-10-27 | Weight-free elevator landing door system and elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115650016A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200966913Y (en) * | 2006-11-02 | 2007-10-31 | 席风春 | Track type power-free dodgems device for entertainment |
| JP2008285296A (en) * | 2007-05-18 | 2008-11-27 | Mitsubishi Electric Corp | Elevator landing door device and its opening/closing device |
| CN202016790U (en) * | 2011-04-22 | 2011-10-26 | 上海贝思特门机有限公司 | Elevator landing door device |
| JP2012144378A (en) * | 2012-05-10 | 2012-08-02 | Mitsubishi Electric Corp | Elevator landing door system and its opening/closing system |
| CN203064969U (en) * | 2013-02-22 | 2013-07-17 | 四川美奥电梯股份有限公司 | Elevator door central opening operator |
| CN210558803U (en) * | 2019-07-18 | 2020-05-19 | 上海贝思特门机有限公司 | Forced self-closing structure of elevator landing door |
| CN113086814A (en) * | 2021-03-31 | 2021-07-09 | 日立电梯（中国）有限公司 | Self-gravity type elevator landing door oblique self-closing structure |
| CN216534733U (en) * | 2021-10-13 | 2022-05-17 | 上海业恋实业有限公司 | Collapsible clothing display device |
| CN218201699U (en) * | 2022-10-27 | 2023-01-03 | 重庆迈高电梯有限公司 | Elevator landing door device, system and elevator |
-
2022
- 2022-10-27 CN CN202211326804.1A patent/CN115650016A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200966913Y (en) * | 2006-11-02 | 2007-10-31 | 席风春 | Track type power-free dodgems device for entertainment |
| JP2008285296A (en) * | 2007-05-18 | 2008-11-27 | Mitsubishi Electric Corp | Elevator landing door device and its opening/closing device |
| CN202016790U (en) * | 2011-04-22 | 2011-10-26 | 上海贝思特门机有限公司 | Elevator landing door device |
| JP2012144378A (en) * | 2012-05-10 | 2012-08-02 | Mitsubishi Electric Corp | Elevator landing door system and its opening/closing system |
| CN203064969U (en) * | 2013-02-22 | 2013-07-17 | 四川美奥电梯股份有限公司 | Elevator door central opening operator |
| CN210558803U (en) * | 2019-07-18 | 2020-05-19 | 上海贝思特门机有限公司 | Forced self-closing structure of elevator landing door |
| CN113086814A (en) * | 2021-03-31 | 2021-07-09 | 日立电梯（中国）有限公司 | Self-gravity type elevator landing door oblique self-closing structure |
| CN216534733U (en) * | 2021-10-13 | 2022-05-17 | 上海业恋实业有限公司 | Collapsible clothing display device |
| CN218201699U (en) * | 2022-10-27 | 2023-01-03 | 重庆迈高电梯有限公司 | Elevator landing door device, system and elevator |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230131 |
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| WW01 | Invention patent application withdrawn after publication |