CN112390121A - Positioning tool for installing elevator landing door device and using method thereof - Google Patents
Positioning tool for installing elevator landing door device and using method thereof Download PDFInfo
- Publication number
- CN112390121A CN112390121A CN202011226906.7A CN202011226906A CN112390121A CN 112390121 A CN112390121 A CN 112390121A CN 202011226906 A CN202011226906 A CN 202011226906A CN 112390121 A CN112390121 A CN 112390121A
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- Prior art keywords
- door device
- landing door
- positioning
- connecting rod
- elevator
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
- E04G21/1858—Templates for window or door openings, e.g. in a masonry wall
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Elevator Door Apparatuses (AREA)
Abstract
The positioning tool for installing the landing door device of the elevator comprises a transverse positioning part used for determining the transverse position of the landing door device in a shaft, a front positioning part used for determining the front and rear positions of the landing door device in the shaft, an upper positioning part and a lower positioning part used for determining the upper and lower positions of the landing door device in the shaft and a supporting part of the landing door device of the elevator.
Description
Technical Field
The invention relates to the field of elevators, in particular to a positioning tool for installing an elevator landing door device and a using method thereof.
Background
According to the following published literature: CN206266068U, CN204369387U, CN203428714U and the state of the art, the positioning of the existing landing door apparatus is mainly realized by the mounting seat connected with the door pocket, wherein the door pocket can be used as an important reference for positioning the landing door apparatus. In a new ladder, the connection between the door pocket and the mounting seat and the connection between the landing door device and the mounting seat can be determined in the design and installation processes, the method is simpler, as shown in fig. 1 and 2, the mounting seat is connected with the door pocket and the relative position is fixed, so that after the landing door device is fixed on the mounting seat, the positions of the landing door device and the door pocket are determined, and the positioning work of the landing door device is completed; however, in the process of modifying the reserved door pocket of the elevator, the door pocket forms on the site are various, and the existing installation seat is difficult to be directly installed on all the door pockets or the precision can not be ensured even if the installation seat can be installed, so that the accurate positioning of the landing door device is influenced.
Another possible positioning method is to position the layer door device by taking the door pocket as a reference through a field sample hanging rack sample placing line. However, this method has a large workload and is complicated to operate.
Aiming at the defects of the prior art, the positioning tool disclosed by the invention positions the landing door device by taking the inner side surface, the outer side surface and the lower end surface of the door pocket as references, wherein the inner side surface of the door pocket can be used for determining the transverse position of the landing door device in a hoistway; the outer side surface of the door pocket can be used for determining the front and rear positions of the landing door device in the shaft; the lower end surface of the door pocket can be used for determining the upper and lower positions of the landing door device in the shaft;
the positioning tool disclosed by the invention is not required to position the landing door device by depending on the mounting seat arranged on the door pocket, each door pocket is provided with three surfaces, namely the inner side surface, the outer side surface and the lower end surface, which are used for positioning the landing door device, and the positioning mode disclosed by the invention can be suitable for various types of door pockets in transformation, so that the problem that the connection form of the mounting seat and the door pocket is variable is avoided.
Disclosure of Invention
In order to solve the problems that in the process of modifying an elevator to reserve door pockets, the door pockets on site are various in form, and the existing installation seats are difficult to be directly installed on all the door pockets or the precision cannot be ensured even if the installation seats can be installed, so that the accurate positioning of a landing door device is influenced, the invention provides a positioning tool for installing the landing door device of the elevator, which comprises a transverse positioning part for determining the transverse position of the landing door device in a shaft, a front and rear positioning part for determining the front and rear positions of the landing door device in the shaft, an upper and lower positioning part for determining the position of the landing door device in the shaft and a bearing part of the landing door device of the elevator; the elevator landing door device is characterized in that the transverse positioning portion is positioned through a position relation with the inner side face of the door pocket, the front positioning portion and the rear positioning portion are positioned through a position relation with the outer side face of the door pocket, the upper positioning portion and the lower positioning portion are positioned through a position relation with the lower end face of the door pocket, and the transverse positioning portion, the front positioning portion, the rear positioning portion, the upper positioning portion, the lower positioning portion and the supporting portion of the elevator landing door device.
Preferably, the tool body is a connecting rod, and two ends of the connecting rod are respectively provided with a transverse positioning part, a front and rear positioning part, an upper and lower positioning part and a bearing part of the elevator landing door device, wherein the transverse positioning part, the front and rear positioning parts, the upper and lower positioning parts and the bearing part can be matched and attached to the inner side surface, the outer side surface and the lower end surface of.
Preferably, the connecting rod is an angle steel, one corner edge of the angle steel is attached to the outer side surface of the door pocket, the other corner edge of the angle steel is attached to the lower end surface of the door pocket, one edge close to the two end portions of the angle steel is fixedly connected with a stop block, the side surface of the stop block is attached to the inner side surface of the door pocket, and the two end portions of the angle steel are fixedly connected with a supporting portion of the landing door device.
Preferably, the stop is provided with a rubber adjustable bolt head.
Preferably, the connecting rod is a length adjustable connecting rod.
Preferably, the length-adjustable connecting rod is of a three-section screw structure.
Preferably, the part of the transverse positioning part, which is attached to the inner side face of the door pocket, is a friction plate with a certain friction coefficient, and the length of the connecting rod is adjusted to increase the pressure of the friction plate on the inner side face of the door pocket so as to increase the static friction force and bear the weight of the tool and the weight of the landing door device.
Preferably, a lug mechanism is arranged at each end of the adjustable connecting rod, the lug mechanisms are hinged with the transverse positioning part pin shaft with the friction plate, the adjustable connecting rod is supported on the lug mechanisms, and under the action of the weight of the tool and the weight of the landing door device, the protruding points of the lug mechanisms prop against and press the friction plate of the transverse positioning part to be tightly attached to the inner side surface of the door pocket.
Preferably, the elevator landing door device bearing part is provided with an adjustable bolt and a limit stop connected with the end supporting plate of the connecting rod.
The invention also relates to a use method of the positioning tool for installing the elevator landing door device, which comprises the following steps:
step 1, mounting supporting parts of an elevator landing door device on two sides of a connecting rod by using bolts;
step 2, pushing the connecting rod against the outer side of the door pocket to perform outer side positioning;
step 3, propping a positioning piece welded with the connecting rod against the lower end of the door pocket for positioning the lower end;
step 4, adjusting the bolt heads with rubber at two sides to abut against the inner side of the door pocket for inner side positioning, and adjusting the position of the bolt until the central line of the connecting rod is flush with the central line of the door pocket;
step 5, mounting the landing door device on a supporting part of the landing door device of the elevator to complete the positioning of the landing door device, wherein the position of a connecting rod is required to be ensured not to move;
and 6, fixing the landing door device.
Preferably, the use method of the positioning tool for installing the elevator landing door device comprises the following steps:
step 1, adjusting an adjustable connecting rod, and adjusting the distance between two ends of a friction plate to be approximately the same as the width of a door sleeve;
step 2, propping the outer side of the door pocket by the front and rear positioning parts to complete outer side positioning;
step 3, the friction device shell is abutted against the lower end of the door pocket to complete lower end positioning;
and 4, further adjusting the adjustable connecting rod to enable the friction plate to be tightly attached to the inner side of the door pocket, and completing inner side positioning.
Step 5, continuously adjusting the adjustable connecting rod to increase the pressing force of the friction plate, so that the positioning tool is pressed on the door pocket;
step 6, mounting the landing door device on a supporting part of the landing door device of the elevator for temporary fixation, wherein the positions of the adjustable connecting rod and the mounting piece can move downwards;
step 7, adjusting the adjustable bolt, and enabling a limit stop block on a bearing part of the elevator landing door device to prop against the front and rear positioning parts, wherein the operation is performed on both sides;
and 8, finishing positioning the landing door device and further fixing the landing door device.
Drawings
Fig. 1 shows an example of a mounting structure disclosed in the prior art.
Fig. 2 is an example of a connection structure of a mounting seat, a landing door device and a door pocket disclosed in the prior art.
Fig. 3 is a structural composition of an embodiment 1 of a positioning tool for installing an elevator landing door device of the invention.
Fig. 4 is a partially enlarged view of the structure of an embodiment 1 of the positioning tool for installing an elevator landing door device according to the present invention.
Fig. 5 is a structural composition of embodiment 2 of the positioning tool for installing the landing door device of the elevator.
Fig. 6 is a partial enlarged view i of the structure of the positioning tool for installing the landing door device of the elevator in embodiment 2 of the invention.
Fig. 7 is a partial enlarged view ii of the structure of the positioning tool for installing an elevator landing door device in embodiment 2 of the invention.
Fig. 8 is a logic block diagram 1 of a method for using the positioning tool for installing the elevator landing door device.
Fig. 9 is a logic block diagram 2 of a method for using the positioning tool for installing the elevator landing door device.
Description of the reference numerals
01 layer door device 02 door pocket
Inner side surface of 03 connecting rod 04
05 outer side 06 lower end face
07 bolt head with positioning piece 08 rubber
09 mounting 10 friction plate
11 strip locating plate 12 friction device casing
13 projection 14 adjusting bolt
15 locating piece on 16 installed parts of briquetting
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, it being understood that the invention is not limited to the specific embodiments described below, and that devices and structures not illustrated in the detailed description are contemplated as being implemented in a manner common to the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, without affecting the spirit of the invention, using the methods and techniques disclosed above, without departing from the scope of the invention.
The positioning tool for installing the elevator landing door device comprises a transverse positioning part used for determining the transverse position of the landing door device in a shaft, a front and rear positioning part used for determining the front and rear positions of the landing door device in the shaft, an upper and lower positioning part used for determining the upper and lower positions of the landing door device in the shaft and a supporting part of the elevator landing door device; the transverse positioning part, the front positioning part, the rear positioning part, the upper positioning part, the lower positioning part and the bearing part of the elevator landing door device are fixedly connected to the tool body.
The following examples are presented to further illustrate the invention.
Example one
As shown in fig. 3 and 4, the positioning tool positions the door assembly 01 with reference to the inner surface 04, the outer surface 05, and the lower end surface 06 of the door pocket 02. The outer side surface 05 positioning of the door pocket 02 is borne by a connecting rod 03 made of angle steel, the lower end surface positioning of the door pocket is borne by a positioning piece 07 or one side of angle steel which is welded with the connecting rod 03, the inner side surface positioning of the door pocket is borne by a bolt head 08 with rubber, the bolt head is adjustable, and when the center line of the door pocket 02 is level with the center line of the connecting rod 03, the positioning of the landing door device 01 is completed. The central line of the door pocket 02 can be measured on site, and the central line of the connecting rod 03 is drawn when being processed.
As shown in fig. 8, the specific installation steps are: 1) mounting pieces 09 serving as supporting parts of the landing door device of the elevator are mounted on two sides of the connecting rod 03 by bolts; 2) the connecting rod 03 is abutted against the outer side of the door pocket for outer side positioning; 2) the positioning piece 07 welded with the connecting rod is abutted against the lower end face 06 of the door pocket 02 for lower end positioning; 3) and adjusting the bolt heads 06 with rubber at two sides to abut against the inner side surface 04 of the door pocket 02 for inner side positioning, and adjusting the positions of the bolts until the central line of the connecting rod is flush with the central line of the door pocket. 4) The landing door device 01 is mounted on the mounting member 09, so that the landing door device 01 is positioned without moving the connecting rod 03. 5) The landing door assembly 01 is fixed.
Example 2:
as shown in fig. 5, 6, and 7, the positioning tool positions the door device 01 with reference to the inner surface 04, the outer surface 05, and the lower end surface 06 of the door pocket 02. The inner side 04 of the door pocket 02 is positioned by the friction plate 10, the outer side 05 of the door pocket 02 is positioned by the strip-shaped positioning plate 11, and the lower end surface 06 of the door pocket 02 is positioned by the friction device shell 12. The middle adjustable connecting rod 03 adopts a three-section type screw structure, friction can be increased by adjusting the adjustable connecting rod 03, and the friction can bear the weight of the tool and the weight of the landing door device 01.
The friction is enhanced by a cam mechanism to increase safety. When the adjustable link 03 is moved downward by the gravity applied from the landing door apparatus 01, the pressing piece 15 acts on the projection 13. The cam 13, by rotating, converts the longitudinal force into a transverse force, pressing the friction lining 10 more tightly against the inner side 04 of the door jamb. The adjustable connecting rod 03 is connected with the mounting piece 09, and the downward moving amount of the adjustable connecting rod 03 and the mounting piece 09 can be adjusted by using the adjusting bolt 14. When the positioning block 16 on the mounting piece abuts against the strip-shaped positioning plate 11, the adjustable connecting rod 03 and the mounting piece 09 are adjusted in place, so that the landing door device 01 is positioned.
As shown in fig. 9, the specific installation steps are: 1) adjusting the adjustable connecting rod to adjust the distance between the two ends of the friction plate to be approximately the same as the width of the door sleeve; 2) the strip-shaped positioning plate is used for propping against the outer side of the door pocket to complete outer side positioning; 3) the friction device shell is abutted against the lower end of the door pocket to complete lower end positioning; 4) and further adjusting the adjustable connecting rod to enable the friction plate to be tightly attached to the inner side of the door pocket to complete inner side positioning. 5) Continuously adjusting the adjustable connecting rod to increase the pressing force of the friction plate, so that the positioning tool is pressed on the door pocket; 6) the landing door device is arranged on the mounting piece and can be used for temporary fixation, and the positions of the adjustable connecting rod and the mounting piece can move downwards at the moment; 7) adjusting the adjustable bolt, jacking the mounting piece until the mounting piece abuts against the strip-shaped positioning plate, and doing the operation on both sides; 8) and finishing the positioning of the landing door device and further fixing the landing door device.
Claims (11)
1. The utility model provides an installation of elevator layer door gear is with location frock which characterized in that includes:
a transverse positioning part used for determining the transverse position of the landing door device in the shaft;
a front and rear positioning part for determining the front and rear positions of the landing door device in the shaft;
the elevator landing door device comprises an upper positioning part, a lower positioning part and an elevator landing door device supporting part, wherein the upper positioning part and the lower positioning part are used for determining the position of the landing door device in a hoistway;
the horizontal location portion is fixed a position through the position relation with the medial surface of door pocket, and the front and back location portion is fixed a position through the position relation with the lateral surface of door pocket, and the upper and lower location portion is fixed a position through the position relation with the lower terminal surface of door pocket, and elevator layer door gear bearing portion is used for bearing installation fixed layer door gear, horizontal location portion, front and back location portion, upper and lower location portion and elevator layer door gear bearing portion fixed connection are on the frock body.
2. The elevator landing door device installation of claim 1 is with location frock, its characterized in that: the tool body is a connecting rod, and the two ends of the connecting rod are respectively provided with a transverse positioning part, a front positioning part, a rear positioning part, an upper positioning part, a lower positioning part and a bearing part of the elevator landing door device, wherein the transverse positioning part, the front positioning part, the rear positioning part, the upper positioning part and the lower positioning part can be matched and attached to the inner side surface, the outer.
3. The elevator landing door device installation of claim 2 is with location frock, its characterized in that: the connecting rod is the angle steel, and the one corner limit of angle steel is pasted and is leaned on door pocket lateral surface, another angle limit or pastes terminal surface under the door pocket with angle steel fixed connection's setting element, is close to an angle steel both ends on one side respectively fixed connection dog, and the side of dog is pasted and is leaned on the door pocket medial surface, and each fixed connection elevator layer door gear bearing portion at angle steel both ends.
4. The elevator landing door device installation of claim 3 is with location frock, its characterized in that: the stop block is an adjustable bolt head with rubber.
5. The elevator landing door device installation of claim 2 is with location frock, its characterized in that: the connecting rod is a connecting rod with adjustable length.
6. The elevator landing door device installation of claim 5 is with location frock, its characterized in that: the length-adjustable connecting rod is of a three-section type screw structure.
7. The elevator landing door device installation of claim 5 or 6 is with location frock, its characterized in that: the part of the transverse positioning part, which is attached to the inner side face of the door pocket, is a friction plate with a certain friction coefficient, and the pressure of the friction plate and the inner side face of the door pocket is increased by adjusting the length of the connecting rod, so that the static friction force is increased, and the weight of the tool and the weight of the landing door device are borne.
8. The elevator landing door device installation of claim 5 or 6 is with location frock, its characterized in that: the end parts of the adjustable connecting rods are respectively provided with a lug mechanism, the lug mechanisms are hinged with the transverse positioning part pin shaft with the friction plates, the adjustable connecting rods are supported on the lug mechanisms, and under the action of the weight of the tool and the weight of the landing door device, the protruding points of the lug mechanisms abut against and press the friction plates of the transverse positioning part to be tightly attached to the inner side surface of the door pocket.
9. The elevator landing door device installation of claim 7 or 8 is with location frock, its characterized in that: the elevator landing door device bearing part is provided with an adjustable bolt connected with the end supporting plate of the connecting rod and a positioning block on the mounting part.
10. The use method of the positioning tool for installing the elevator landing door device according to claim 4 comprises the following steps:
step 1, mounting supporting parts of an elevator landing door device on two sides of a connecting rod by using bolts;
step 2, the connecting rod is abutted against the outer side of the door pocket to perform outer side positioning;
step 3, propping a positioning piece welded with the connecting rod against the lower end of the door pocket for positioning the lower end;
step 4, adjusting the bolt heads with rubber at two sides to abut against the inner side of the door pocket for inner side positioning, and adjusting the position of the bolt until the central line of the connecting rod is flush with the central line of the door pocket;
step 5, mounting the landing door device on a supporting part of the landing door device of the elevator to complete the positioning of the landing door device, wherein the position of a connecting rod is required to be ensured not to move;
and 6, fixing the landing door device.
11. The use method of the positioning tool for installing the elevator landing door device according to claim 9, comprising the following steps of:
step 1, adjusting an adjustable connecting rod, and adjusting the distance between two ends of a friction plate to be approximately the same as the width of a door sleeve;
step 2, propping the outer side of the door pocket by the front and rear positioning parts to complete outer side positioning;
step 3, the friction device shell is abutted against the lower end of the door pocket to complete lower end positioning;
and 4, further adjusting the adjustable connecting rod to enable the friction plate to be tightly attached to the inner side of the door pocket, and completing inner side positioning.
Step 5, continuously adjusting the adjustable connecting rod to increase the pressing force of the friction plate, so that the positioning tool is pressed on the door pocket;
step 6, mounting the landing door device on a supporting part of the landing door device of the elevator for temporary fixation, wherein the positions of the adjustable connecting rod and the mounting piece can move downwards;
step 7, adjusting the adjustable bolt to enable a limit stop block on a bearing part of the elevator landing door device to prop against the front and rear positioning parts, and performing the operation on two sides of the elevator landing door device;
and 8, finishing the positioning of the landing door device and further fixing the landing door device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226906.7A CN112390121B (en) | 2020-11-06 | 2020-11-06 | Positioning tool for installation of elevator landing door device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226906.7A CN112390121B (en) | 2020-11-06 | 2020-11-06 | Positioning tool for installation of elevator landing door device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112390121A true CN112390121A (en) | 2021-02-23 |
| CN112390121B CN112390121B (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011226906.7A Active CN112390121B (en) | 2020-11-06 | 2020-11-06 | Positioning tool for installation of elevator landing door device and using method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN112390121B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114104926A (en) * | 2021-11-23 | 2022-03-01 | 上海三菱电梯有限公司 | Landing assembly positioning tool and elevator landing door assembly mounting method |
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| JPH07300283A (en) * | 1994-05-09 | 1995-11-14 | Toshiba Corp | Landing display device for elevator |
| JPWO2012176297A1 (en) * | 2011-06-23 | 2015-02-23 | 三菱電機株式会社 | Elevator landing door equipment |
| CN204450292U (en) * | 2015-01-23 | 2015-07-08 | 昆明钢铁集团有限责任公司 | A kind of die set device that effectively can improve elevator door installation accuracy and speed |
| CN205151487U (en) * | 2015-11-17 | 2016-04-13 | 四川科成机电设备有限公司 | Elevator layer door system |
| CN110980487A (en) * | 2019-11-22 | 2020-04-10 | 聊城市高力金属材料有限公司 | Installation component for elevator door sleeve and elevator door sleeve component |
| CN111634791A (en) * | 2020-06-10 | 2020-09-08 | 日立电梯（中国）有限公司 | Elevator landing door assembly installation method |
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2020
- 2020-11-06 CN CN202011226906.7A patent/CN112390121B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07300283A (en) * | 1994-05-09 | 1995-11-14 | Toshiba Corp | Landing display device for elevator |
| JPWO2012176297A1 (en) * | 2011-06-23 | 2015-02-23 | 三菱電機株式会社 | Elevator landing door equipment |
| CN204450292U (en) * | 2015-01-23 | 2015-07-08 | 昆明钢铁集团有限责任公司 | A kind of die set device that effectively can improve elevator door installation accuracy and speed |
| CN205151487U (en) * | 2015-11-17 | 2016-04-13 | 四川科成机电设备有限公司 | Elevator layer door system |
| CN110980487A (en) * | 2019-11-22 | 2020-04-10 | 聊城市高力金属材料有限公司 | Installation component for elevator door sleeve and elevator door sleeve component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114104926A (en) * | 2021-11-23 | 2022-03-01 | 上海三菱电梯有限公司 | Landing assembly positioning tool and elevator landing door assembly mounting method |
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| CN112390121B (en) | 2022-12-20 |
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