CN108861955B - Traction belt of elevator system and belt pulley thereof, and elevator employing traction belt and belt pulley - Google Patents
Traction belt of elevator system and belt pulley thereof, and elevator employing traction belt and belt pulley Download PDFInfo
- Publication number
- CN108861955B CN108861955B CN201710328872.4A CN201710328872A CN108861955B CN 108861955 B CN108861955 B CN 108861955B CN 201710328872 A CN201710328872 A CN 201710328872A CN 108861955 B CN108861955 B CN 108861955B
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- Prior art keywords
- traction
- belt
- traction belt
- elevator system
- sheave
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- 238000005452 bending Methods 0.000 claims abstract description 7
- 239000011247 coating layer Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 239000007769 metal material Substances 0.000 claims description 11
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
- B66B7/062—Belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B15/00—Main component parts of mining-hoist winding devices
- B66B15/02—Rope or cable carriers
- B66B15/04—Friction sheaves; "Koepe" pulleys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
- B66B7/1207—Checking means
- B66B7/1215—Checking means specially adapted for ropes or cables
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The invention provides a traction belt of an elevator system, a belt pulley thereof and an elevator adopting the traction belt and the belt pulley. The traction belt of the elevator system includes: a carrying unit extending along the entire length of the traction belt; the early warning unit extends along the whole traction belt length in parallel with the bearing unit, and the bending fatigue life of the early warning unit is lower than that of the bearing unit; and a coating layer coated outside the bearing unit and the early warning unit, wherein the traction belt has a strip shape with a uniform thickness and at least one continuously undulating profile in a width direction, thereby forming concave and convex portions on an A side engaged with the traction sheave and a B side engaged with the guide sheave. The pulley comprises a traction sheave and a guide sheave, the surface of the traction sheave having two different coefficients of friction. By the cooperation of the continuously undulating contours, axial play of the traction belt is prevented when the traction belt passes through the gear train.
Description
Technical Field
The present invention relates to a drive device for an elevator system, and more particularly to an elevator hoisting belt and a pulley.
Background
The traction belt is applied to the elevator industry for many years, and has the advantages of longer service life, lower noise, lower maintenance cost, compact structure and the like compared with the traditional steel wire rope traction mode.
Among the traction belts of prior art elevator systems, the use of flat belts as traction belts is most common. To avoid axial play of the belt along the pulley system during operation, the pulley is designed with a convex crown profile in cross section along the axis of rotation, see fig. 8. Such a design, while helping to address axial play as the traction belt passes through the gear train, the crowned pulley causes the mating traction belt to deform in the width direction, thereby increasing internal stresses and reducing the service life of the traction belt.
In order to solve the problem of axial movement of the traction belt when passing through the gear train, some elevator systems adopt a multi-wedge belt as the traction belt, and the problem of axial movement of the belt along the gear train can be solved to a certain extent through the multi-wedge belt wheel matched with the multi-profile. One surface of the V-ribbed belt is provided with a belt wedge, the other surface is a plane. Therefore, in practical elevator applications, especially on elevators with a traction ratio of 2:1, the belt contacts the guide wheel on one side of the plane when passing through the guide wheel of the car, so that the problem of axial movement of the belt along the gear train cannot be thoroughly avoided. Although the belt can be turned over by an auxiliary device, this increases the cost and reduces the reliability of the system; this problem can also be solved by arranging the gear train, but this will greatly reduce the wrap angle of the belt on the traction sheave and may cause problems with insufficient traction capacity.
The information disclosed in the background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a traction belt of an elevator system and a belt pulley thereof, which are used for solving the problem of axial movement of the traction belt along a gear train in the elevator system in the prior art, and the traction belt is not deformed in the width direction.
Specifically, the present invention provides a traction belt of an elevator system, which connects and drives an elevator car and a counterweight, comprising: a carrying unit extending along the entire traction belt length; the early warning unit extends parallel to the bearing unit along the whole traction belt length, and the bending fatigue life of the early warning unit is lower than that of the bearing unit; and a coating layer which is coated outside the bearing unit and the early warning unit, wherein the traction belt is in a strip shape with uniform thickness and has at least one continuously undulating profile in the width direction, thereby forming concave and convex parts on the A side matched with the traction sheave and the B side matched with the guide sheave.
In the traction belt of the elevator system according to the present invention described above, it is preferable that the traction belt further includes a straight section in a width direction of a cross section thereof.
In the traction belt of the elevator system according to the present invention described above, it is preferable that the carrying units are arranged equidistantly or non-equidistantly along the width direction of the traction belt along with the undulation of the traction belt, but symmetrically with respect to the center of the cross section of the traction belt.
In the traction belt of the elevator system according to the present invention described above, preferably, the load bearing unit is composed of a plurality of steel wires or a plurality of independent strands, the plurality of steel wires being of the same structure, each steel wire being twisted around a core by a plurality of strands; the independent strands have the same structure, and each strand is formed by twisting a plurality of steel wires.
In the traction belt of the elevator system according to the invention described above, the warning unit is preferably constituted by strands that are different from the strands used in the load-bearing unit or by a single independent wire that is different from the wires used in the load-bearing unit.
The invention also provides a pulley of an elevator system for use with a traction belt of an elevator system as described above, comprising a traction sheave made of a metallic material having a continuously undulating profile in the axial direction matching the a-side of the traction belt of the elevator system and a guide sheave having a continuously undulating profile in the axial direction matching the B-side of the traction belt of the elevator system.
In the aforementioned pulleys of the elevator system according to the invention, the surface of the traction sheave preferably has at least two different friction coefficients. Further preferably, the traction sheave further comprises one or more inserts of non-metallic material embedded therein, the inserts of non-metallic material circumferentially surrounding the traction sheave, forming part of a continuous undulating profile of the traction sheave, having equal or unequal widths in the axial direction but being symmetrical with respect to the center of the traction belt cross-section; or the surface of the traction sheave further comprises one or more surface-treated belts circumferentially encircling the traction sheave, the widths in the axial direction being equal or unequal, but symmetrical with respect to the center of the traction belt cross-section.
The invention also provides an elevator, which comprises the traction belt of the elevator system and the belt pulley of the elevator system.
The traction belt of the elevator system is matched with the belt pulley of the elevator system, and has at least the following beneficial technical effects:
Axial play of the traction belt when passing over the traction sheave is prevented by the cooperation of the traction sheave with the continuously undulating profile between the a-side of the traction belt for the elevator system; and the cooperation of the guide wheel with the continuously undulating profile between the B side of the hoisting belt for the elevator system prevents axial play of the hoisting belt when passing through the guide wheel. The friction coefficient of the traction sheave surface is changed by embedding one or more inserts of non-metallic materials in the traction sheave or by changing the surface roughness of the traction sheave local surface, thereby displaying adjustment or control of traction force to meet different demands for traction force.
In addition, the bending fatigue life of the early warning unit is lower than that of the bearing unit, and an alarm can be sent out to prompt maintenance or replacement when the traction belt is damaged due to fatigue.
The method and apparatus of the present invention have other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the present invention.
Drawings
Fig. 1 presents a schematic cross-sectional view of an embodiment of the hoisting belt of the elevator system according to the invention.
Fig. 2A presents a schematic view of the hoisting belt and the traction sheave of the elevator system according to the invention.
Fig. 2B is a sectional view of the traction sheave taken along the section C-C of fig. 2A.
Fig. 3 presents a schematic view of the hoisting belt of the elevator system according to the invention in conjunction with the guide wheel.
Fig. 4 presents another embodiment of the hoisting belt of the elevator system according to the invention.
Fig. 5 presents a schematic view of the structure of the load bearing unit of the hoisting belt of the elevator system according to the invention.
Fig. 6 presents another constructional schematic of the load bearing unit of the hoisting belt of the elevator system according to the invention.
Fig. 7A shows a schematic structural view of an early warning unit with a rope strand structure of a traction belt of an elevator system according to the present invention.
Fig. 7B shows a schematic structural view of an early warning unit of a structure of a hoisting belt of an elevator system according to the invention with a single independent wire.
Fig. 8 shows a schematic of a prior art elevator system traction belt wherein a flat belt traction belt is deformed as it passes over a crowned pulley.
Wherein, the reference numerals in the drawings are as follows:
1-drawing a belt; 2-a carrying unit; 3-an early warning unit; 4-coating; 5-a recess; 6-a convex part; 7-a straight section; 8-center; 9-traction sheave; 10-conical surface section of traction sheave; 11-a projection of the traction sheave; 12-a concave part of the traction sheave; 13-a metal material part of the traction sheave; 14-traction sheave rotation axis; 15-a guide wheel; 16-conical surface section of the guide wheel; 17-a recess of the guide wheel; 18-a projection of the guide wheel; 19-the axis of rotation of the guide wheel; 20-embedding objects of traction wheels; 21-a steel wire rope; 22-strands; 23-steel wire; 24-rope core; 25-strands; 26-steel wire; 27-steel wire; 28-strands; 29-steel wire; 30-steel wire.
It should be understood that the drawings are not necessarily to scale, illustrating various features of the basic principles of the invention that may be somewhat simplified. The particular design features of the invention disclosed herein, including, for example, specific dimensions, orientations, positioning, and configurations, will be determined in part by the particular intended application and use environment.
Detailed Description
Reference will now be made in detail to the various embodiments of the invention, examples of which are illustrated in the accompanying drawings and in the description below. While the invention will be described in conjunction with the exemplary embodiments, it will be understood that this description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
The present invention will be specifically described with reference to fig. 2A to 8.
Fig. 1 shows a traction belt 1 of an elevator system, which connects and drives an elevator car and a counterweight. The hoisting belt 1 comprises a carrying unit 2 extending along the entire length of the hoisting belt 1; an early warning unit 3 extending parallel to the carrying unit 2 along the entire length of the hoisting belt 1, the bending fatigue life of which is lower than that of the carrying unit 2; and a coating layer 4 which is coated outside the bearing unit 2 and the warning unit 3, wherein the traction belt 1 has a strip shape with a uniform thickness and has at least one continuous undulating profile in a width direction, thereby forming concave portions 5 and convex portions 6 on an a side engaged with the traction sheave and a B side engaged with the guide sheave.
In addition to the concave portions 5 and the convex portions 6, the traction belt 1 may also include straight sections 7 in the width direction of its cross section to meet specific structural requirements.
The carrying unit 2 is arranged along the width direction of the traction belt 1 along with the undulation of the traction belt. This may be equidistant or non-equidistant, but symmetrical with respect to the center 8 of the cross-section of the hoisting belt 1. Thereby ensuring a uniform load-bearing capacity of the entire cross section of the traction belt 1.
The load bearing unit 2 may consist of a plurality of steel cords 21 or a plurality of individual strands 25.
Fig. 5 shows a load-bearing unit 2 consisting of a wire rope 21. The wire rope 21 is composed of strands 22 and a core 24, and the strands 22 are wound around the core 24 and twisted. Fig. 6 shows a load-bearing unit 2 consisting of individual strands 25, twisted from a plurality of steel wires 26 around a steel wire 27 in the core.
The structure of the carrying unit 2 shown in fig. 5 and 6 is merely an example, and the present invention is not limited thereto. The carrying unit 2 of the invention can be made of any element capable of satisfying the required carrying capacity of the hoisting belt 1.
The pre-warning unit 3 may be constituted by strands that are different from the strands used in the carrying unit 2 or by a single independent wire that is different from the wires used in the carrying unit 2.
Fig. 7A shows a schematic structure of the warning unit 3 having a strand structure, and the strands 28 constituting the warning unit 3 are composed of a plurality of (3 are shown in the drawing, but not limited thereto) steel wires 29 (elliptical are shown in the drawing, but not limited thereto). Fig. 7B shows a schematic structural view of the early warning unit 3 having the structure of a single independent wire 30.
The structure of the early warning unit 3 shown in fig. 7A and 7B is merely an example, and the present invention is not limited thereto, as long as the bending fatigue life thereof is lower than that of the bearing unit 2, thereby ensuring that fatigue fracture occurs prior to the bearing unit 2, and further ensuring the reliability of the traction belt 1.
In fig. 2A schematic diagram of the use of the hoisting belt 1 of the elevator system according to the invention in conjunction with a traction sheave 9 is shown.
Fig. 2A shows that the traction sheave 9 has a continuously undulating profile in the axial direction that matches the a-side of the traction belt 1 of the elevator system. The traction sheave 9 also has a plurality of inserts 20 of non-metallic material embedded therein, the inserts 20 of non-metallic material circumferentially surrounding the traction sheave 9 forming part of the continuous relief of the traction sheave 9.
Fig. 2B is a sectional view of the traction sheave taken along section C-C of fig. 2A, showing a structure in which an inlay 20 of a non-metallic material circumferentially surrounds and is embedded in the traction sheave 9.
The friction coefficient of the traction sheave 9 can be changed or adjusted at different parts by the non-metallic inlay 20, thereby achieving the purpose of changing or adjusting the traction force of the traction sheave 9.
The friction force on the surface of the traction sheave 9 may be controlled by other methods. For example, instead of using the non-metallic inlay 20, the corresponding position of the traction sheave 9 is subjected to a special surface treatment or treatment to form one or more surface-treated belts, whereby the friction coefficient is changed by changing the surface roughness of the partial surface of the traction sheave 9.
Fig. 3 presents a schematic view of the hoisting belt 1 of the elevator system according to the invention in conjunction with the guide wheel 15. Fig. 3 shows that the guide wheel 15 has a continuously undulating profile in the axial direction which matches the B-side of the traction belt for an elevator system.
In use, axial play of the traction belt when the belt is passed over the traction sheave is prevented by the cooperation of the traction sheave with the continuously undulating profile between the a-side of the traction belt for the elevator system; and the cooperation of the guide wheel with the continuously undulating profile between the B side of the hoisting belt for the elevator system prevents axial play of the hoisting belt when passing through the guide wheel.
The friction coefficient of the traction sheave surface is changed by embedding one or more non-metal embedded objects in the traction sheave or changing the surface roughness of the traction sheave local surface, thereby realizing adjustment or control of traction force so as to meet different requirements of traction force.
In addition, the bending fatigue life of the early warning unit is lower than that of the bearing unit, and an alarm can be sent out to prompt maintenance or replacement when the traction belt is damaged due to fatigue.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable others skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the following claims and their equivalents.
Claims (10)
1. A traction belt of an elevator system that connects and drives an elevator car and a counterweight, comprising:
-a carrying unit (2) extending along the entire length of the hoisting belt (1);
An early warning unit (3) extending parallel to the carrying unit (2) along the entire length of the hoisting belt (1) and having a bending fatigue life lower than that of the carrying unit (2); and
A coating layer (4) which is wrapped outside the bearing unit (2) and the early warning unit (3),
Wherein the traction belt (1) has a strip shape with a uniform thickness and has at least one continuously undulating profile in the width direction, so that concave portions (5) and convex portions (6) are formed on the A side which cooperates with the traction sheave and the B side which cooperates with the guide sheave,
Wherein the concave part on the A side of the traction belt (1) is matched with the convex part (11) of the traction wheel, and the convex part on the A side of the traction belt (1) is matched with the concave part (12) of the traction wheel; the concave part on the B side of the traction belt (1) is matched with the convex part (18) of the guide wheel, and the convex part on the B side of the traction belt (1) is matched with the concave part (17) of the guide wheel.
2. Traction belt of an elevator system according to claim 1, characterized in that the traction belt (1) further comprises a straight section (7) in the width direction of its cross section.
3. The traction belt of an elevator system according to claim 1, characterized in that: the bearing units (2) are equidistantly or non-equidistantly distributed along the width direction of the traction belt (1) along with the fluctuation of the traction belt, but are symmetrical relative to the center of the section of the traction belt (1).
4. The traction belt of an elevator system according to claim 1, characterized in that: the bearing unit (2) consists of a plurality of steel wire ropes or a plurality of independent ropes, the plurality of steel wire ropes are of the same structure, and each steel wire rope is formed by twisting a plurality of ropes around a rope core; the independent strands have the same structure, and each strand is formed by twisting a plurality of steel wires.
5. The traction belt of an elevator system according to claim 1, characterized in that: the pre-warning unit (3) is formed by strands that are different from the strands used in the carrying unit (2) or by a single independent wire that is different from the wires used in the carrying unit (2).
6. Pulley for an elevator system, for use with a traction belt of an elevator system according to claims 1-5, comprising a traction sheave (9) and a guide sheave (15) made of metal material, characterized in that: the traction sheave (9) has a continuously undulating contour in the axial direction matching the A-side of the traction belt of the elevator system, the guide sheave (15) has a continuously undulating contour in the axial direction matching the B-side of the traction belt of the elevator system,
Wherein the concave part on the A side of the traction belt (1) is matched with the convex part (11) of the traction wheel, and the convex part on the A side of the traction belt (1) is matched with the concave part (12) of the traction wheel; the concave part on the B side of the traction belt (1) is matched with the convex part (18) of the guide wheel, and the convex part on the B side of the traction belt (1) is matched with the concave part (17) of the guide wheel.
7. The pulley of an elevator system of claim 6, wherein: the surface of the traction sheave (9) has at least two different friction coefficients.
8. The pulley of an elevator system of claim 7, wherein: the traction sheave (9) further comprises one or more inserts (20) of non-metallic material embedded therein, the inserts (20) of non-metallic material circumferentially surrounding the traction sheave (9) forming part of a continuous relief of the traction sheave (9); the width of the non-metallic inlay (20) along the axial direction is equal or unequal, but is symmetrical relative to the center of the section of the traction belt.
9. The pulley of an elevator system of claim 7, wherein: the surface of the traction sheave (9) further comprises one or more surface treatment belts which circumferentially surround the traction sheave (9); the surface treatment tapes have equal or unequal widths in the axial direction but are symmetrical with respect to the center of the traction tape cross section.
10. An elevator, characterized in that: a traction belt comprising the elevator system according to claims 1-5, and a pulley of the elevator system according to claims 6-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710328872.4A CN108861955B (en) | 2017-05-11 | 2017-05-11 | Traction belt of elevator system and belt pulley thereof, and elevator employing traction belt and belt pulley |
| PCT/EP2018/062235 WO2018206777A1 (en) | 2017-05-11 | 2018-05-11 | A traction belt of elevator system and a pulley thereof, and an elevator with the traction belt and the pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710328872.4A CN108861955B (en) | 2017-05-11 | 2017-05-11 | Traction belt of elevator system and belt pulley thereof, and elevator employing traction belt and belt pulley |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108861955A CN108861955A (en) | 2018-11-23 |
| CN108861955B true CN108861955B (en) | 2024-08-16 |
Family
ID=62167317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710328872.4A Active CN108861955B (en) | 2017-05-11 | 2017-05-11 | Traction belt of elevator system and belt pulley thereof, and elevator employing traction belt and belt pulley |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108861955B (en) |
| WO (1) | WO2018206777A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109466989B (en) * | 2018-12-29 | 2021-01-22 | 江苏兴华胶带股份有限公司 | Carbon fiber reinforced cold-resistant and flame-retardant balance compensation chain for manned high-speed elevator |
| DE102019205382A1 (en) * | 2019-04-15 | 2020-10-15 | Contitech Antriebssysteme Gmbh | Pull or shoulder strap |
| US11999590B2 (en) | 2022-01-03 | 2024-06-04 | Otis Elevator Company | Modular elevator sheave assembly |
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- 2017-05-11 CN CN201710328872.4A patent/CN108861955B/en active Active
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| CN101848852A (en) * | 2007-09-27 | 2010-09-29 | 奥蒂斯电梯公司 | An elevator load bearing member |
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| CN106414300A (en) * | 2013-11-22 | 2017-02-15 | 奥的斯电梯公司 | Idler or deflector sheave for elevator system |
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| Publication number | Publication date |
|---|---|
| CN108861955A (en) | 2018-11-23 |
| WO2018206777A1 (en) | 2018-11-15 |
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Address after: 201602 No.2 Xunye Road, Sheshan District, Songjiang Industrial Zone, Songjiang District, Shanghai Applicant after: Tisheng elevator (Shanghai) Co.,Ltd. Address before: 201602 No.2 Xunye Road, Sheshan District, Songjiang Industrial Zone, Songjiang District, Shanghai Applicant before: ThyssenKrupp Elevator (Shanghai) Co.,Ltd. |
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