CN110550520A - Side shield for elevator host - Google Patents

Side shield for elevator host Download PDF

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Publication number
CN110550520A
CN110550520A CN201910888385.2A CN201910888385A CN110550520A CN 110550520 A CN110550520 A CN 110550520A CN 201910888385 A CN201910888385 A CN 201910888385A CN 110550520 A CN110550520 A CN 110550520A
Authority
CN
China
Prior art keywords
plate
cover plate
top plate
elevator
main machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910888385.2A
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Chinese (zh)
Other versions
CN110550520B (en
Inventor
张继文
张平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong University of Technology
Original Assignee
Guangdong University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN201910888385.2A priority Critical patent/CN110550520B/en
Publication of CN110550520A publication Critical patent/CN110550520A/en
Application granted granted Critical
Publication of CN110550520B publication Critical patent/CN110550520B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0043Devices enhancing safety during maintenance
    • B66B5/005Safety of maintenance personnel

Abstract

the application discloses a side shield for an elevator host, which comprises a first shield plate, a second shield plate and an adjustable connecting piece, wherein the first shield plate is connected with the second shield plate through the adjustable connecting piece, and a protection cavity with adjustable width is formed between the first shield plate and the second shield plate; through setting up first cover plate and second cover plate to connect first cover plate and second cover plate through adjustable connecting piece, make to form the protection chamber that can adjust the width between first cover plate and the second cover plate, can adapt to the host computer that multiple possess different steel wire slot numbers like this and use, the commonality is strong, convenient to use.

Description

side shield for elevator host
Technical Field
The application relates to an elevator protection technical field especially relates to an elevator is side guard shield for host computer.
Background
The elevator main machine is the power place of the whole elevator, is mainly installed through a main machine frame and is placed in an elevator machine room, and a guide wheel is further installed below the main machine frame and used for guiding a steel wire rope to vertically reach an elevator car. The main machine mainly drives the steel wire rope to move through rotation, so that the elevator runs up and down. Although the existing host machine manufacturers are provided with the host machine covers for the host machines, the host machine covers only protect the steel wire ropes of the traction wheels on the host machines, and most host machine manufacturers are not provided with host machine side protective covers in the steel wire rope areas between the host machines and the guide wheels, so that fingers easily touch the exposed steel wire ropes and twist the exposed steel wire ropes to the traction wheels during maintenance and overhaul, and the host machine side protective covers are extremely dangerous for elevator protection personnel.
although some host machine side shields exist in the market, the universal type is not strong, the host machine side shields can only be used for hosts with specific steel wire slot numbers, and the use limitation is large.
Disclosure of Invention
In view of this, the purpose of this application is to provide an elevator is side guard shield for host computer, and the commonality is strong, convenient to use.
In order to achieve the above technical object, the present application provides a side shield for an elevator main machine, including: the adjustable cover plate comprises a first cover plate, a second cover plate and an adjustable connecting piece;
the first cover plate is connected with the second cover plate through an adjustable connecting piece, and a protection cavity with adjustable width is formed between the first cover plate and the second cover plate.
Further, the first cover plate comprises a first top plate and a first side plate which is connected with the first top plate and is distributed in an L shape with the first top plate;
The second cover plate comprises a second top plate and a second side plate which is connected with the second top plate and is distributed in an L shape with the second top plate;
The first top plate is connected with the second top plate through the adjustable connecting piece.
Further, the adjustable connecting piece is specifically a piano plate;
One side edge of the piano plate is connected with one side edge of the first top plate, and the other side edge of the piano plate is connected with one side edge of the second top plate.
Further, the telescopic rod and the fixing ring are further included;
the telescopic rod is arranged on the inner side wall of the first top plate along the width direction of the protection cavity and is positioned below the piano plate;
The fixing ring is installed on the inner side wall of the second top plate and connected with the telescopic end of the telescopic rod.
Further, the adjustable connecting piece comprises a bolt and a nut matched with the bolt;
The first top plate is provided with a first adjusting hole which is arranged along the width direction of the protection cavity and through which the bolt can movably pass;
And a second adjusting hole which is arranged along the width direction of the protection cavity and matched with the first adjusting hole is formed in the second top plate.
Further, the first adjusting hole and the second adjusting hole are waist circular holes.
furthermore, first mounting holes are symmetrically formed in the positions of two end portions of the outer side wall of the first side plate;
The first side plate is connected with an outer cover of the elevator main machine and a main frame of the elevator main machine for installation through the first installation hole.
further, the device also comprises a mounting plate;
The mounting plate is mounted on the outer cover of the elevator main machine and is provided with a plurality of second mounting holes matched with the first mounting holes;
The second mounting holes are distributed in a lattice mode.
furthermore, the first mounting holes are multiple and are distributed in a lattice manner.
Furthermore, an open slot is formed in the middle of the outer side wall of the first side plate.
According to the technical scheme, the first cover plate and the second cover plate are arranged, the first cover plate and the second cover plate are connected through the adjustable connecting piece, the protection cavity with the adjustable width is formed between the first cover plate and the second cover plate, the protection cavity can be adapted to various hosts with different steel wire groove numbers, and the protection device is high in universality and convenient to use.
drawings
in order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic illustration of an installation of a side shield for an elevator main machine provided in the present application;
fig. 2 is an isometric view of a side shield for an elevator machine provided in the present application;
Fig. 3 is a front view of a side shield for an elevator machine provided in the present application;
Fig. 4 is a rear view of a side shield for an elevator machine provided in the present application;
Fig. 5 is a schematic view of a partial installation structure of the adjustable connecting member of the side cover for the main machine of the elevator provided in the present application, which is a wind instrument plate;
in the figure: 1. a first cover plate; 11. a first top plate; 111. a first adjustment aperture; 12. a first side plate; 121. a first mounting hole; 122. an open slot; 2. a second cover plate; 21. a second top plate; 211. a second adjustment aperture; 22. a second side plate; 3. an adjustable connector; 31. a bolt; 32. a nut; 41. a telescopic rod; 42. a fixing ring; 5. an elevator main machine; 6. mounting a plate; 61. a second mounting hole; 7. a main frame; 8. a guide wheel; 9. a steel cord.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, an elevator main machine 5 is a power source of the whole elevator, and is mainly installed and fixed through a main machine frame 7 and placed in an elevator machine room, a guide wheel 8 is further installed below the main machine frame 7 and used for guiding a steel wire rope 9 to vertically reach an elevator car, the elevator main machine 5 mainly drives the steel wire rope 9 to move through rotation, and then the elevator runs up and down, the applicant finds that although an existing main machine manufacturer is provided with a main machine cover on the elevator main machine 5, the main machine cover only protects the steel wire rope 9 of a traction wheel on the main machine, but the steel wire rope 9 between the elevator main machine 5 and the guide wheel 8 is not provided with a protective cover, the elevator protective cover is a great danger for elevator protection personnel, fingers easily touch the exposed steel wire rope 9 and twist into the traction wheel, so that dangers such as palm waste and the like are caused, although some protective covers are used for protection in the existing market, but, the protective cover can only be used for a specific host, has specific specification and model, needs to be designed in a non-standard way and then produced in a non-standard way every time of use, and is complex in installation mode, because the elevator is divided into a plurality of trapezoids such as a passenger elevator, a goods elevator and the like, the number of steel wire grooves of the elevator host 5 is different from 5 to 16, the number of steel wire ropes 9 is determined to be different from 5 to 16, the width design of the protective cover always becomes the difficulty of universal design, and the following technical scheme is provided.
the embodiment of the application discloses side guard shield for elevator host computer.
referring to fig. 1 and 2, an embodiment of a side shield for an elevator main machine provided in an embodiment of the present application includes:
The adjustable protection device comprises a first cover plate 1, a second cover plate 2 and an adjustable connecting piece 3, wherein the first cover plate 1 is connected with the second cover plate 2 through the adjustable connecting piece 3, and a protection cavity with adjustable width is formed between the first cover plate 1 and the second cover plate 2.
according to the technical scheme, the first cover plate 1 and the second cover plate 2 are arranged, the first cover plate 1 and the second cover plate 2 are connected through the adjustable connecting piece 3 to form the side shield, the protection cavity with the adjustable width is formed between the first cover plate 1 and the second cover plate 2, the protection cavity can be adapted to various hosts with different steel wire line slot numbers, and the protection device is high in universality and convenient to use.
the above is a first embodiment of a side shield for an elevator main machine provided in the embodiment of the present application, and the following is a second embodiment of a side shield for an elevator main machine provided in the embodiment of the present application, and refer to fig. 1 to 5 specifically.
the utility model provides an elevator is side guard shield for host computer, includes first cover plate 1, second cover plate 2 and adjustable connecting piece 3, and first cover plate 1 is connected with second cover plate 2 through adjustable connecting piece 3, and forms the protection chamber of adjustable width between first cover plate 1 and the second cover plate 2.
Further, referring to fig. 2, the structural design of the first cover plate 1 and the second cover plate 2 may be, for example, as follows, the first cover plate 1 includes a first top plate 11 and a first side plate 12 connected to the first top plate 11 and distributed in an L shape between the first top plate 11, wherein the first top plate 11 is vertically connected to the first side plate 12, the second cover plate 2 includes a second top plate 21 and a second side plate 22 connected to the second top plate 21 and distributed in an L shape between the second top plate 21, similarly, the second top plate 21 is also vertically connected to the second side plate 22, the first top plate 11 is connected to the second top plate 21 through an adjustable connector 3, the connection between the first cover plate 1 and the second cover plate 2 is also realized through the connection between the first top plate 11 and the second top plate 21, so that the top and side protection is realized for the steel wire rope 9, and two ports are open, and do not interfere with the operation of the steel wire rope 9, the first cover plate 1 and the second cover plate 2 in the embodiment can be made of aluminum alloy, and have good structural strength and light weight.
in addition, the first top plate 11 and the first side plate 12, and the second top plate 21 and the second side plate 22 may be integrally formed by bending, and the processing is convenient, and certainly, the structures of the first cover plate 1 and the second cover plate 2 are not limited to the above structural design, and those skilled in the art may make appropriate changes based on the above structures, and are not limited in particular.
Further, referring to fig. 5, the adjustable connecting member 3 may be a piano plate made of soft materials such as rubber, so that the amount of expansion and contraction provided by the piano plate is greater, the adjustable space between the first cover plate 1 and the second cover plate 2 is better, the width adjustment degree of the correspondingly formed protection cavity is greater, the adaptability is better, during installation, one side edge of the piano plate is connected with one side edge of the first top plate 11, the other side edge of the piano plate is connected with one side edge of the second top plate 21, the connection mode may be bonding or fastening by fasteners such as screws, and when the adjustable connecting member 3 is a piano plate, the side covers are fixed, the first cover plate 1 and the second cover plate 2 may be fixed, and the first cover plate 1 and the second cover plate 2 are fixed with the elevator main body and the main frame 7 respectively, so as to achieve better fixation of the whole.
Further, referring to fig. 5, it may also include a telescopic rod 41 and a fixing ring 42, and the telescopic rod 41 is installed on the inner sidewall of the first top plate 11 along the width direction of the protection cavity and located below the wind instrument plate, and the fixing ring 42 is installed on the inner sidewall of the second top plate 21 and connected with the telescopic end of the telescopic rod 41, by such a structure, the stable connection between the first cover plate 1 and the second cover plate 2 is increased, the connection between the first cover plate 1 and the second cover plate 2 is stabilized by the insertion and fixation between the telescopic rod 41 and the fixing ring 42, and then only the first cover plate 1 may be fixed, the second cover plate 2 may be supported and fixed by the telescopic rod 41 between the fixed first cover plates 1, thereby reducing the fixing process of the second cover plate 2, and the telescopic rod 41 may also be better adapted to the telescopic adjustment of the wind instrument plate, the corresponding telescopic rod 41 may be a telescopic structure used in a conventional umbrella with a folded rib, based on this, those skilled in the art can easily change the structure of the telescopic rod 41, and the structure is not limited in particular.
further, the adjustable connecting member 3 may also be other adjustable connecting structural members, and the adjustable connecting member 3 may include a bolt 31 and a nut 32 engaged with the bolt 31; the first cover plate 1 and the second cover plate 2 are locked or loosened by the matching of the bolt 31 and the nut 32, wherein the first top plate 11 is provided with a first adjusting hole 111 which is arranged along the width direction of the protection cavity and is used for the bolt 31 to movably pass through, the second top plate 21 is provided with a second adjusting hole 211 which is arranged along the width direction of the protection cavity and is matched with the first adjusting hole 111, the first adjusting hole 111 and the second adjusting hole 211 are both arranged along the width direction of the protection cavity, so that the relative fixing position of the first top plate 11 and the second top plate 21 can be adjusted by adjusting the matching position of the first adjusting hole 111 and the second adjusting hole 211, the sliding adjustment matching of the first top plate 11 and the second top plate 21 can be realized, the adjustment of the width of the protection cavity is realized, the adjusting process, the matching position of the bolt 31 and the nut 32 is loosened, the matching position of the first adjusting hole 111 and the second adjusting hole 211 is adjusted, the width of the formed protection cavity meets the requirement, and then the bolts 31 and the nuts 32 are locked to realize fastening, so that the structural design can realize the position adjustment between the first cover plate 1 and the second cover plate 2, and the adjusted connection between the first cover plate 1 and the second cover plate 2 can be fixed through the bolts 31 and the nuts 32, so that when the whole protection cavity is installed and fixed, the whole protection cavity can be fixed only by fixing the first cover plate 1.
Further, the first adjusting hole 111 and the second adjusting hole 211 can be waist circular holes, wherein the length of the waist circular holes can be selected according to needs, of course, the first adjusting hole 111 and the second adjusting hole 211 can also be formed by a plurality of through holes arrayed along the same linear direction, and the number and the interval of the through holes can also be selected according to needs.
further, taking the above-mentioned connecting member as the bolt 31 and the nut 32 as an example, the whole can be fixedly mounted by fixing the first cover plate 1 correspondingly, and therefore, the first mounting holes 121 may be symmetrically provided at the two end portions on the outer side wall of the first side plate 12, so that the first side plate 12 may be connected with the outer cover of the elevator main machine 5 and the main frame 7 of the elevator main machine 5 for mounting respectively through the first mounting holes 121, and may be directly fastened on the outer cover of the motor main machine and the main frame 7 through fasteners such as screws and the like during mounting, or may also be fixedly connected by using the above-mentioned bolt 31 and nut 32.
Further, many times, elevator main part dustcoat is not very good installation, still need extra punching operation, consequently can also include mounting panel 6 in this embodiment, earlier with mounting panel 6 through modes such as welding installation fixed in elevator host computer 5 dustcoat, and be equipped with a plurality of and first mounting hole 121 complex second mounting hole 61 on mounting panel 6, and make a plurality of second mounting holes 61 be the dot matrix distribution, such structural design not only makes things convenient for the installation of first curb plate 12 and elevator host computer 5, but also can realize the adjustment of the whole angle of side guard plate through the cooperation of selecting with different second mounting hole 61, it is more nimble to use.
Further, when the number of the first mounting holes 121 is single, the first side plate 12 must be mounted at both ends to be stable, but the mounting process is complicated, so in this embodiment, the first mounting holes 121 may be multiple, and the multiple first mounting holes 121 are distributed in a dot matrix, so when the first side plate 12 and the mounting plate 6 are mounted, two or more first mounting holes 121 may be selected to be fixed, thereby achieving better fixing connection matching, refer to fig. 1, and meanwhile, by selecting different hole site matching, the mounting angle adjustment of the first cover plate 1 is still achieved, thereby facilitating the angle adjustment of the whole side cover, such structural design may also reduce the mounting of the first side plate 12 and the main frame 7, of course, the mounting and fixing manner may also be achieved at the main frame 7 side, and the main frame 5 side of the elevator may also employ such mounting manners as at both sides, further stabilizing the overall installation.
Furthermore, an opening groove 122 is formed in the middle of the outer side wall of the first side plate 12, referring to fig. 1, the certain opening groove 122 is formed, so that overall quality can be reduced, the structure is lighter, a better observation angle is provided, and maintenance personnel can observe the inside condition of the protection cavity through the opening groove 122 conveniently.
According to the technical scheme, the first cover plate 1 and the second cover plate 2 are arranged, the first cover plate 1 and the second cover plate 2 are connected through the adjustable connecting piece 3, the protection cavity with the adjustable width is formed between the first cover plate 1 and the second cover plate 2, the protection cavity can be adapted to various hosts with different steel wire line groove numbers, and the protection cavity is high in universality and convenient to use.
While the side shield for the main machine of the elevator provided by the present application has been described in detail, those skilled in the art will appreciate that the present invention is not limited thereto, and that the present invention is not limited to the foregoing description.

Claims (10)

1. A side shield for an elevator main machine, comprising: the adjustable cover plate comprises a first cover plate, a second cover plate and an adjustable connecting piece;
The first cover plate is connected with the second cover plate through an adjustable connecting piece, and a protection cavity with adjustable width is formed between the first cover plate and the second cover plate.
2. The side shield for the main machine of the elevator according to claim 1, wherein the first cover plate comprises a first top plate and a first side plate connected with the first top plate and distributed in an L shape with the first top plate;
the second cover plate comprises a second top plate and a second side plate which is connected with the second top plate and is distributed in an L shape with the second top plate;
The first top plate is connected with the second top plate through the adjustable connecting piece.
3. The side shield for an elevator main machine according to claim 2, wherein the adjustable connection member is a piano plate;
one side edge of the piano plate is connected with one side edge of the first top plate, and the other side edge of the piano plate is connected with one side edge of the second top plate.
4. The side shield for an elevator main machine according to claim 3, further comprising a telescopic rod and a fixing ring;
The telescopic rod is arranged on the inner side wall of the first top plate along the width direction of the protection cavity and is positioned below the piano plate;
The fixing ring is installed on the inner side wall of the second top plate and connected with the telescopic end of the telescopic rod.
5. The side shield for an elevator machine according to claim 2, wherein the adjustable connection member includes a bolt and a nut fitted to the bolt;
The first top plate is provided with a first adjusting hole which is arranged along the width direction of the protection cavity and through which the bolt can movably pass;
And a second adjusting hole which is arranged along the width direction of the protection cavity and matched with the first adjusting hole is formed in the second top plate.
6. The side shield for an elevator main machine according to claim 5, wherein the first adjusting hole and the second adjusting hole are waist circular holes.
7. The side shield for the main unit of the elevator according to claim 2, wherein the outer side wall of the first side plate is symmetrically provided with first mounting holes at both end portions;
The first side plate is connected with an outer cover of the elevator main machine and a main frame of the elevator main machine for installation through the first installation hole.
8. the side shield for an elevator main machine according to claim 7, further comprising a mounting plate;
the mounting plate is mounted on the outer cover of the elevator main machine and is provided with a plurality of second mounting holes matched with the first mounting holes;
the second mounting holes are distributed in a lattice mode.
9. The side shield for an elevator main unit according to claim 8, wherein the first mounting holes are plural and are distributed in a lattice.
10. The side shield for the main unit of an elevator according to claim 2, wherein an open groove is formed in the middle of the outer side wall of the first side plate.
CN201910888385.2A 2019-09-19 2019-09-19 Side shield for elevator host Expired - Fee Related CN110550520B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910888385.2A CN110550520B (en) 2019-09-19 2019-09-19 Side shield for elevator host

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910888385.2A CN110550520B (en) 2019-09-19 2019-09-19 Side shield for elevator host

Publications (2)

Publication Number Publication Date
CN110550520A true CN110550520A (en) 2019-12-10
CN110550520B CN110550520B (en) 2021-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910888385.2A Expired - Fee Related CN110550520B (en) 2019-09-19 2019-09-19 Side shield for elevator host

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1679283A1 (en) * 2004-12-13 2006-07-12 Stingl GmbH Traction sheave protection
CN201487527U (en) * 2009-08-05 2010-05-26 尚园科技有限公司 Combined structure of expansion protection cover
CN101920883A (en) * 2010-08-25 2010-12-22 康力电梯股份有限公司 Speed governor rope protecting device
JP5088214B2 (en) * 2008-04-10 2012-12-05 三菱電機株式会社 Rope brake unit for elevator
CN104261235A (en) * 2014-10-23 2015-01-07 苏州新达电扶梯部件有限公司 Adjustable tractor lateral shield
CN204224008U (en) * 2014-11-04 2015-03-25 广东辛格林电梯有限公司 A kind of elevator(lift) machine room logical rope mouth protective cover
US20170362057A1 (en) * 2016-06-16 2017-12-21 Colin Hodge Roller guide for elevators
CN109850823A (en) * 2018-11-20 2019-06-07 国网河南省电力公司洛阳供电公司 A kind of alternating current repairing carrying tool firmly installed

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1679283A1 (en) * 2004-12-13 2006-07-12 Stingl GmbH Traction sheave protection
JP5088214B2 (en) * 2008-04-10 2012-12-05 三菱電機株式会社 Rope brake unit for elevator
CN201487527U (en) * 2009-08-05 2010-05-26 尚园科技有限公司 Combined structure of expansion protection cover
CN101920883A (en) * 2010-08-25 2010-12-22 康力电梯股份有限公司 Speed governor rope protecting device
CN104261235A (en) * 2014-10-23 2015-01-07 苏州新达电扶梯部件有限公司 Adjustable tractor lateral shield
CN204224008U (en) * 2014-11-04 2015-03-25 广东辛格林电梯有限公司 A kind of elevator(lift) machine room logical rope mouth protective cover
US20170362057A1 (en) * 2016-06-16 2017-12-21 Colin Hodge Roller guide for elevators
CN109850823A (en) * 2018-11-20 2019-06-07 国网河南省电力公司洛阳供电公司 A kind of alternating current repairing carrying tool firmly installed

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