CN110589667A - Elevator safety sill capable of preventing sundries from separating - Google Patents
Elevator safety sill capable of preventing sundries from separating Download PDFInfo
- Publication number
- CN110589667A CN110589667A CN201910799052.2A CN201910799052A CN110589667A CN 110589667 A CN110589667 A CN 110589667A CN 201910799052 A CN201910799052 A CN 201910799052A CN 110589667 A CN110589667 A CN 110589667A
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- Prior art keywords
- groove
- sill
- door
- sliding block
- working
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/30—Constructional features of doors or gates
- B66B13/301—Details of door sills
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- Elevator Door Apparatuses (AREA)
Abstract
The invention provides an elevator safety sill capable of preventing sundries from separating, wherein sill structures are correspondingly arranged on two sides of a junction of a building ground and the elevator ground, each sill structure comprises a hall door sill and a car door sill, the hall door sill is correspondingly connected with a hall door, the car door sill is correspondingly connected with a car door, the hall door sills and the car door sills are identical in structure and are symmetrically arranged by the inner side and the outer side of an elevator, each sill structure comprises a sill cover plate and a sill groove, the sill cover plate covers the upper parts of the sill grooves, working grooves are formed in the sill cover plate, the working grooves are located right above the groove structures of the sill grooves, the width of the working grooves is smaller than that of the groove structures, and the bottoms of the hall doors or the car doors are connected into the working grooves and the sill grooves through sliding blocks. The sill structure greatly reduces the exposed area, reduces the probability of falling into sundries, simultaneously reduces the danger of door panel separation, and can ensure that the door panel is not separated even under the conditions of abrasion of the sliding block and increase of the clearance.
Description
Technical Field
The invention relates to a safety device of a door opening structure in the field of elevators, in particular to an elevator safety sill capable of preventing sundries from separating.
Background
The elevator sill is the structure of installing the ground juncture in the elevator position of opening the door, the effect of linking building ground and bottom surface in the elevator has been played, the effect of protection is played, improve passenger's sense of safety, the elevator sill still has the effect of connecting room door and sedan-chair door in addition, what the top installation of room door and sedan-chair door was door machine and guide rail, the switching of door machine control room door and sedan-chair door, and there is corresponding guide slot on the sill, the bottom of room door and sedan-chair door is connected on the guide slot, a removal for restricting room door and sedan-chair door, realize steady switching door, avoid appearing skew problem.
The sill is provided with a guide groove for stipulating the operation of the hall door or the car door, the guide groove on the sill is of an open structure, when the door is opened, the guide groove corresponding to the door opening is opened towards the side surface due to the door plate, the guide groove is directly exposed, so that sundries easily fall into the guide groove, the probability of falling the sundries is small due to less goods entering and exiting in common passenger ladders, but when the elevator door is used as a goods ladder, the risk of falling the sundries is obviously increased due to special goods transportation, in addition, the elevator door mainly comprises the hall door and the car door, due to the structural characteristics of installation, the side edges of the hall door and the car door are not provided with any connecting structure, the main connecting structures are arranged at the top end and the bottom end, the top end and the bottom end are both short sides of the door plate structure, the self connection bearing force only meets the force of opening the door, when the hall door or the car door is impacted by external force, the connecting, when the elevator runs, serious danger is easy to occur, and the safety of passengers is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the elevator safety sill capable of preventing sundries from separating.
The technical scheme adopted by the invention for solving the problems is as follows: the sill structure is correspondingly arranged on two sides of a junction of the building ground and the elevator ground, the sill structure comprises a hall door sill and a car door sill, the hall door sill is correspondingly connected with a hall door, the car door sill is correspondingly connected with a car door, the hall door sill and the car door sill are identical in structure and are symmetrically arranged with the inner side and the outer side of the elevator, the sill structure comprises a sill cover plate and a sill groove, the sill cover plate covers the upper portion of the sill groove, a working groove is formed in the sill cover plate and is located right above the groove structure of the sill groove, the width of the working groove is smaller than that of the groove structure, and the bottom of the hall door or the car door is connected with the working groove and the sill groove through a sliding block. The sill structure sets up with the inside and outside symmetry of elevator, is fit for quick installation to it is low to make the degree of difficulty, and the width of the work groove on the sill apron is owing to be less than the width in sill groove itself, has reduced the exposure area by a wide margin, has reduced the probability that falls into debris, simultaneously because the width reduces, strengthens locking power and pulling force to the slider structure, has reduced the danger that the door plant breaks away from, and even also can guarantee not break away from in the condition that slider wearing and tearing, clearance increase.
Further, the outside end shaping of the door opening direction of sill apron has the mounting groove, and the width of mounting groove is greater than the width of work groove and is less than the width of cell type structure, and the length of mounting groove is greater than the length of slider. The mounting slot is a wide slot for mounting the slider into the mounting position and is not a slot used in normal operation, and the slot only contacts with the working part of the slider, and the slider is mounted and dismounted through the slot. In addition, the mounting groove is formed in the horizontal plane of the relative ground, if the mounting groove is not formed, the sliding block needs to be taken down from the end part of the side face of the sill groove, the door opening distance is large for some environments, the well distance is small, the operation is inconvenient, the relative distance during mounting can be reduced after the mounting groove is formed, and the requirement on the environment is reduced.
Furthermore, the working groove on the sill cover plate comprises a slow door groove and a shutter groove which are arranged in parallel, the length of the shutter groove is larger than that of the slow door groove, the fast door groove is connected with a fast opening door plate, and the slow door groove is connected with a slow opening door plate. The fast door slot and the slow door slot are matched in an elevator mode with a large door opening distance, the shutter and the slow door move simultaneously, the speed of the shutter is about 2 times that of the slow door, the distance of the shutter is about half, the purpose of quickly opening and closing the door is achieved, and the structure is more applied to goods elevators or medical elevators.
Furthermore, the working grooves are symmetrically arranged on two sides by taking the door opening center line as a center, the working grooves are disconnected at the center line, the lengths of the working grooves on the two sides of the center line are equal, the mounting grooves are arranged at the outer side ends of the working grooves, the outer side ends of the working grooves on the two sides are provided with the mounting grooves, and the distance between the ends of the two sides of the working grooves corresponds to the distance of the whole door opening process. The door opening device is a setting mode of a structural working groove of a split door, the two ends of the main working groove are symmetrically arranged to realize half-and-half door opening, the middle part is a place where a sliding block cannot run, so that the door opening device is disconnected, the stroke limit is also realized, the mounting grooves are matched at the two ends, and the sliding block and the door plate are respectively mounted in place from the two ends. The structure of the split door can also be set as a slow door slot and a shutter slot, the split door and the shutter are matched, the shutter and the slow door are arranged on each side, and the split door is suitable for the overlarge door opening distance.
Furthermore, the one end in shutter groove and slow gate groove is flat sets up mutually to the shaping has the mounting groove, and shutter groove and slow gate groove all extend the shaping to the other end, and the length in shutter groove is for opening the whole distance of door, and the length in slow gate groove is 1/2 ~ 2/3 of the whole distance of opening the door.
Furthermore, the mounting groove and the sliding block are mutually inserted and sleeved, the sliding block comprises a sliding block plate, a hard lug and a plastic abrasion part, the sliding block plate is vertically connected to the bottom edge of the hoistway door or the car door, the thickness of the sliding block plate is smaller than the width of the working groove, the hard lug is fixedly formed on the lower portion of the sliding block plate, the thickness of the hard lug is larger than the width of the working groove, the plastic abrasion part covers the outer portion of the hard lug and wraps the bottom of the sliding block plate, one end of the plastic abrasion part of the sliding block is downwards inserted into the mounting groove and is slidably mounted to the working groove, and the outer portion of the plastic abrasion part is matched and formed with the groove-shaped structure of the floor groove. The thickness of the hard bump structure on the sliding block is larger than the width of the working groove, so that the plastic abrasion part can still be ensured to be incapable of being separated even after being abraded.
Furthermore, an oblique angle structure is formed at the position where the mounting groove is connected with the working groove, and the oblique angle structure is connected with the edges of the mounting groove and the working groove, which are different in width. The mounting groove and the working groove have different widths, and the edges with different widths are stably connected by arranging an oblique angle structure, so that a good guiding effect is achieved in the mounting or dismounting process.
Furthermore, the sliding block is fixed at the bottom of the car door or the hall door through screws, and two or more sliding blocks are connected with a single hall door or a door plate of the car door. The slider is detachable connection, is convenient for change and maintain, and the bottom of door plant connects the slider more than two in addition, plays the effect of balancing weight.
Further, the sill groove is including collet and channel type body, the collet embedding is in the below ground, and the channel type body is installed in the collet, the collet is the "U" type cross-sectional structure of panel bending type formation, and the channel type body is buckled through panel and is formed the recessed channel type structure of cross-section for the rectangle, and collet and channel type body reciprocal anchorage are integrative. The structure of the ground ridge groove is formed by adopting a bent steel plate, the processing cost is low, the structure is processed separately, the manufacturing difficulty is low, and the ground ridge groove is suitable for being adopted in the existing equipment.
Furthermore, the edge of the groove-shaped body exceeds the edge of the bottom support, and the edge of the groove-shaped body is fixedly connected with the right-angle structure of the bottom support through welding. The collet is fixedly connected with the groove body through welding, the quality is reliable, and the structure is stable and not easy to break away.
Compared with the prior art, the invention has the following advantages and effects: the sill structure sets up with the inside and outside symmetry of elevator, is fit for quick installation to it is low to make the degree of difficulty, and the width of the work groove on the sill apron is owing to be less than the width in sill groove itself, has reduced the exposure area by a wide margin, has reduced the probability that falls into debris, simultaneously because the width reduces, strengthens locking power and pulling force to the slider structure, has reduced the danger that the door plant breaks away from, and even also can guarantee not break away from in the condition that slider wearing and tearing, clearance increase.
Drawings
Fig. 1 is a schematic side cross-sectional view of the main structure of the present invention.
Fig. 2 is a schematic structural view of an upper surface of a doorsill cover for a split door.
Fig. 3 is a schematic view showing the structure of the upper surface of the doorsill cover for the side door.
Fig. 4 is a schematic view of the anti-separation effect of the door panel after being stressed.
In the figure: 1. the elevator door sill comprises a hoistway door sill body, 2, a car door sill body, 3, a hoistway door (or a car door), 4, a sill cover plate, 5, a sill groove, 6, a working groove, 7, a sliding block, 8, a mounting groove, 9, a slow door groove, 10, a shutter groove, 11, a sliding block plate, 12, a hard bump, 13 plastic abrasion parts, 14, an oblique angle structure, 15, a bottom support, 16 and a groove body.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Example 1: as shown in fig. 1 and 2, the elevator safety sill capable of preventing sundries from separating comprises a landing sill 1 and a car door sill 2, the landing sill 1 is correspondingly connected with a landing door, the car door sill 2 is correspondingly connected with a car door, the landing door sill 1 and the car door sill 2 are structurally the same and symmetrically arranged with the boundary of the inner side and the outer side of the elevator, the sill structure comprises a sill cover plate 4 and a sill groove 5, the sill cover plate 4 covers the upper part of the sill groove 5, a working groove 6 is formed in the sill cover plate 4, the working groove 6 is positioned right above the groove structure of the sill groove 5, the width of the working groove 6 is smaller than that of the groove structure, and the bottoms of the landing door or the car door are connected in the working groove 6 and the sill groove 5 through a sliding block 7.
The outside end of the door opening direction of the sill cover plate 4 is formed with a mounting groove 8, the width of the mounting groove 8 is larger than that of the working groove 6 and smaller than that of the groove structure, and the length of the mounting groove 8 is larger than that of the sliding block 7.
The working groove 6 on the sill cover plate 4 comprises a slow door groove 9 and a shutter groove 10, the slow door groove 9 and the shutter groove 10 are arranged in parallel, the length of the shutter groove 10 is larger than that of the slow door groove 9, a fast-opening door plate is connected to the fast door groove 10, and a slow-opening door plate is connected to the slow door groove 9.
The working grooves 6 are symmetrically arranged on two sides by taking a door opening center line as a center, the working grooves 6 are disconnected at the center line, the lengths of the working grooves 6 on the two sides of the center line are equal, the mounting grooves 8 are arranged at the outer side ends of the working grooves 6, the outer side ends of the working grooves 6 on the two sides are provided with the mounting grooves 8, and the distance between the end parts of the two sides of the working grooves 6 corresponds to the distance of the whole door opening process.
The installation groove 8 and the sliding block 7 are mutually inserted and sleeved, the sliding block 7 comprises a sliding block plate 11, a hard bump 12 and a plastic wear part 13, the sliding block plate 11 is vertically connected to the bottom edge of a hoistway door or a car door, the thickness of the sliding block plate 11 is smaller than the width of the working groove 6, the hard bump 12 is fixedly formed on the lower portion of the sliding block plate 11, the thickness of the hard bump 12 is larger than the width of the working groove 6, the plastic wear part 13 covers the outer portion of the hard bump 12 and wraps the bottom of the sliding block plate 11, one end of the plastic wear part 13 of the sliding block 7 is downwards inserted into the installation groove 8 and is slidably installed towards the working groove 6, and the outer portion of the plastic wear part 13 is matched and formed with the groove-shaped structure of the sill.
The position where the mounting groove 8 is connected with the working groove 6 is formed with an oblique angle structure 14, and the oblique angle structure 14 is connected with the edges of the mounting groove 8 and the working groove 6 with different widths.
The sliding block 7 is fixed at the bottom of the car door or the hall door through screws, and two or more sliding blocks 7 are connected with a single hall door or a door plate of the car door.
The floor trough 5 comprises a bottom support 15 and a trough 16, the bottom support 15 is embedded below the ground, the trough 16 is installed in the bottom support 15, the bottom support 15 is a U-shaped section structure formed by bending a plate, the trough 16 is a recessed trough structure with a rectangular section formed by bending the plate, and the bottom support 15 and the trough 16 are fixed into a whole.
The edge of the groove-shaped body 16 exceeds the edge of the bottom support 15, and the edge of the groove-shaped body 16 is fixedly connected with the right-angle structure of the bottom support 15 through welding.
Example 2: as shown in fig. 1 and 3, the elevator safety sill capable of preventing sundries from separating comprises a landing sill 1 and a car door sill 2, the landing sill 1 is correspondingly connected with a landing door, the car door sill 2 is correspondingly connected with a car door, the landing door sill 1 and the car door sill 2 are structurally the same and symmetrically arranged with the boundary of the inner side and the outer side of the elevator, the sill structure comprises a sill cover plate 4 and a sill groove 5, the sill cover plate 4 covers the upper part of the sill groove 5, a working groove 6 is formed in the sill cover plate 4, the working groove 6 is positioned right above the groove structure of the sill groove 5, the width of the working groove 6 is smaller than that of the groove structure, and the bottoms of the landing door or the car door are connected in the working groove 6 and the sill groove 5 through a sliding block 7.
The outside end of the door opening direction of the sill cover plate 4 is formed with a mounting groove 8, the width of the mounting groove 8 is larger than that of the working groove 6 and smaller than that of the groove structure, and the length of the mounting groove 8 is larger than that of the sliding block 7.
The working groove 6 on the sill cover plate 4 comprises a slow door groove 9 and a shutter groove 10, the slow door groove 9 and the shutter groove 10 are arranged in parallel, the length of the shutter groove 10 is larger than that of the slow door groove 9, a fast-opening door plate is connected to the fast door groove 10, and a slow-opening door plate is connected to the slow door groove 9.
The one end in shutter groove 10 and slow door groove 9 is flat sets up mutually to the shaping has mounting groove 8, and shutter groove 10 and slow door groove 9 all extend the shaping to the other end, and the length in shutter groove 10 is the distance of whole journey of opening the door, and the length in slow door groove 9 is 1/2 ~ 2/3 of whole distance of opening the door.
The installation groove 8 and the sliding block 7 are mutually inserted and sleeved, the sliding block 7 comprises a sliding block plate 11, a hard bump 12 and a plastic wear part 13, the sliding block plate 11 is vertically connected to the bottom edge of a hoistway door or a car door, the thickness of the sliding block plate 11 is smaller than the width of the working groove 6, the hard bump 12 is fixedly formed on the lower portion of the sliding block plate 11, the thickness of the hard bump 12 is larger than the width of the working groove 6, the plastic wear part 13 covers the outer portion of the hard bump 12 and wraps the bottom of the sliding block plate 11, one end of the plastic wear part 13 of the sliding block 7 is downwards inserted into the installation groove 8 and is slidably installed towards the working groove 6, and the outer portion of the plastic wear part 13 is matched and formed with the groove-shaped structure of the sill.
The position where the mounting groove 8 is connected with the working groove 6 is formed with an oblique angle structure 14, and the oblique angle structure 14 is connected with the edges of the mounting groove 8 and the working groove 6 with different widths.
The sliding block 7 is fixed at the bottom of the car door or the hall door through screws, and two or more sliding blocks 7 are connected with a single hall door or a door plate of the car door.
The floor trough 5 comprises a bottom support 15 and a trough 16, the bottom support 15 is embedded below the ground, the trough 16 is installed in the bottom support 15, the bottom support 15 is a U-shaped section structure formed by bending a plate, the trough 16 is a recessed trough structure with a rectangular section formed by bending the plate, and the bottom support 15 and the trough 16 are fixed into a whole.
The edge of the groove-shaped body 16 exceeds the edge of the bottom support 15, and the edge of the groove-shaped body 16 is fixedly connected with the right-angle structure of the bottom support 15 through welding.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that the present embodiments be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a prevent elevator safety sill that debris anticreep broke away, the sill structure corresponds the both sides that set up in the juncture on building ground and elevator ground, and the sill structure corresponds on hall door sill (1) and connects the hall door including hall door sill (1) and sedan-chair sill (2), corresponds on the hall door sill (1) and connects the sedan-chair door, its characterized in that: the landing sill (1) and the car door sill (2) are identical in structure and are symmetrically arranged with the inner side and the outer side of an elevator, the sill structure comprises a sill cover plate (4) and a sill groove (5), the sill cover plate (4) covers the upper portion of the sill groove (5), a working groove (6) is formed in the sill cover plate (4), the working groove (6) is located right above the groove-shaped structure of the sill groove (5), the width of the working groove (6) is smaller than that of the groove-shaped structure, and the bottom of the landing door or the car door is connected to the working groove (6) and the sill groove (5) through a sliding block (7).
2. The debris and separation prevention elevator safety sill according to claim 1, characterized in that: the outside end shaping of the door opening direction of sill apron (4) has mounting groove (8), and the width of mounting groove (8) is greater than the width of work groove (6) and is less than the width of cell type structure, and the length of mounting groove (8) is greater than the length of slider (7).
3. The debris and separation prevention elevator safety sill according to claim 2, characterized in that: the working groove (6) on the sill cover plate (4) comprises a slow door groove (9) and a shutter groove (10), the slow door groove (9) and the shutter groove (10) are arranged in parallel, the length of the shutter groove (10) is larger than that of the slow door groove (9), the fast door plate is connected to the shutter groove (10), and the slow door plate is connected to the slow door groove (9).
4. An elevator safety sill capable of preventing sundries from separating according to claim 2 or 3, characterized in that: work groove (6) use the central line that opens the door to set up in both sides as central symmetry, work groove (6) are in central line department disconnection, and work groove (6) are isometric in the length of central line both sides, mounting groove (8) set up the outside end in work groove (6), and the outside end in the work groove (6) of both sides all is provided with mounting groove (8), and the distance between the tip of work groove (6) both sides corresponds with the whole distance of opening the door.
5. The elevator safety sill capable of preventing sundries from separating according to claim 3, characterized in that one end of the fast door groove (10) and one end of the slow door groove (9) are arranged in parallel, a mounting groove (8) is formed, the fast door groove (10) and the slow door groove (9) are formed by extending towards the other end, the length of the fast door groove (10) is the distance of the whole door opening process, and the length of the slow door groove (9) is 1/2 ~ 2/3 of the whole door opening process.
6. The debris and separation prevention elevator safety sill according to claim 2, characterized in that: the mounting groove (8) and the sliding block (7) are mutually inserted and sleeved, the sliding block (7) comprises a sliding block plate (11), a hard lug (12) and a plastic abrasion part (13), the sliding block plate (11) is vertically connected to the bottom edge of a hoistway door or a car door, the thickness of the sliding block plate (11) is smaller than the width of the working groove (6), the hard lug (12) is fixedly formed on the lower portion of the sliding block plate (11), the thickness of the hard lug (12) is larger than the width of the working groove (6), the plastic abrasion part (13) covers the outer portion of the hard lug (12) and wraps the bottom of the sliding block plate (11), one end of the plastic abrasion part (13) of the sliding block (7) is downwards inserted into the mounting groove (8) and is slidably mounted in the working groove (6), and the outer portion of the plastic abrasion part (13) is matched and formed with the groove-shaped structure of the sill groove (5).
7. The debris and separation prevention elevator safety sill according to claim 6, characterized in that: the position that mounting groove (8) and work groove (6) are connected shaping has oblique angle structure (14), and the edge of the different widths of mounting groove (8) and work groove (6) is connected to oblique angle structure (14).
8. The debris and separation prevention elevator safety sill according to claim 6, characterized in that: the sliding block (7) is fixed at the bottom of the car door or the hall door through screws, and two or more sliding blocks (7) are connected with a single hall door or a door plate of the car door.
9. The debris and separation prevention elevator safety sill according to claim 1 or 2, characterized in that: the floor trough (5) comprises a bottom support (15) and a trough body (16), the bottom support (15) is embedded below the ground, the trough body (16) is installed in the bottom support (15), the bottom support (15) is a U-shaped section structure formed by bending plates, the trough body (16) is a concave trough-shaped structure with a rectangular section formed by bending plates, and the bottom support (15) and the trough body (16) are fixed into a whole.
10. The debris and separation prevention elevator safety sill according to claim 9, characterized in that: the edge of the groove-shaped body (16) exceeds the edge of the bottom support (15), and the edge of the groove-shaped body (16) is fixedly connected with the right-angle structure of the bottom support (15) through welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910799052.2A CN110589667A (en) | 2019-08-28 | 2019-08-28 | Elevator safety sill capable of preventing sundries from separating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910799052.2A CN110589667A (en) | 2019-08-28 | 2019-08-28 | Elevator safety sill capable of preventing sundries from separating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110589667A true CN110589667A (en) | 2019-12-20 |
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ID=68855969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910799052.2A Withdrawn CN110589667A (en) | 2019-08-28 | 2019-08-28 | Elevator safety sill capable of preventing sundries from separating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110589667A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493160A (en) * | 2021-07-26 | 2021-10-12 | 日立电梯（中国）有限公司 | Transformation method and device for elevator car door strength through mark |
-
2019
- 2019-08-28 CN CN201910799052.2A patent/CN110589667A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493160A (en) * | 2021-07-26 | 2021-10-12 | 日立电梯（中国）有限公司 | Transformation method and device for elevator car door strength through mark |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| 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: 20191220 |
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| WW01 | Invention patent application withdrawn after publication |