CN108840214B - Automatic cleaning device for escalator handrail - Google Patents
Automatic cleaning device for escalator handrail Download PDFInfo
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- CN108840214B CN108840214B CN201810857569.8A CN201810857569A CN108840214B CN 108840214 B CN108840214 B CN 108840214B CN 201810857569 A CN201810857569 A CN 201810857569A CN 108840214 B CN108840214 B CN 108840214B
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- clamping shell
- roller
- cleaning
- handrail
- box body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B31/00—Accessories for escalators, or moving walkways, e.g. for sterilising or cleaning
- B66B31/02—Accessories for escalators, or moving walkways, e.g. for sterilising or cleaning for handrails
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- Escalators And Moving Walkways (AREA)
Abstract
The invention discloses an automatic cleaning device for an escalator handrail, which comprises a clamping shell, a liquid feeding mechanism, a scrubbing mechanism, a wiping mechanism, a disinfecting mechanism and a sewage collecting mechanism, wherein the clamping shell is clamped on a support plate below the handrail, two side walls of the middle part of the clamping shell are provided with support blocks positioned below the bottom surfaces of two sides of the handrail, and cleaning cotton cloth is arranged on the support blocks; the liquid feeding mechanism consists of a box body, a leather cup, a straight rod, a spring and a linear motor; the scrubbing mechanism consists of a scraping wheel, a scraping and brushing sheet, cleaning cotton cloth and a driving motor; the wiping mechanism consists of a cleaning roller, a detachable and washable cleaning cotton sleeve and a driving motor; the disinfection mechanism is an ultraviolet lamp tube, and the sewage collection mechanism consists of a sewage collection tank and a bevel sliding water tank; the liquid feeding mechanism, the brushing mechanism, the wiping mechanism and the disinfection mechanism are arranged in the clamping shell at intervals in sequence. The device realizes all-round cleaning of the hand strap, has a disinfection function, ensures the hand strap to be clean, and avoids potential safety hazards caused by dirt of the hand strap.
Description
Technical Field
The invention relates to an automatic cleaning device for an escalator handrail.
Background
The escalator is widely applied to public places such as shopping malls, supermarkets and pedestrian overpasses, and compared with a lifting elevator, the escalator has strong continuous conveying capacity, can convey people to each floor without stopping, and has outstanding advantages. However, the handrail of the escalator is large in passenger flow, so that the handrail can be touched by countless people in the conveying process, the surface and the side edges of the handrail can be stuck with a lot of dirt for a long time, the handrail is not attractive and has a sanitation potential hazard, and especially the outdoor escalator handrail of the pedestrian overpass is more polluted, so that a user is unwilling to touch the handrail, and the safety potential hazard is caused.
In the prior art, chinese patent application CN106429778A discloses a modern device for cleaning an elevator handrail belt, which is formed by clamping the device on an escalator by a fixing body, and cleaning the handrail belt by matching a lower cleaning plate, an upper cleaning roller, a cleaning agent applying roller and a water roller. However, the device does not involve sterilization of the handrail belt and the side lower surface of the handrail belt cannot be cleaned.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic cleaning device for a handrail of an escalator, which overcomes the defect of the traditional handrail cleaning, realizes all-dimensional cleaning of the handrail, has a disinfection function, ensures the cleanness of the handrail and avoids potential safety hazards caused by dirt of the handrail.
In order to solve the technical problem, the automatic cleaning device for the escalator handrail comprises a clamping shell, a liquid feeding mechanism, a scrubbing mechanism, a wiping mechanism, a disinfecting mechanism and a sewage collecting mechanism, wherein the bottom of the clamping shell is provided with an opening and is clamped on a supporting plate below the handrail, the handrail passes through the clamping shell, and two side walls in the middle of the clamping shell are provided with supporting blocks positioned below the bottom surfaces of two sides of the handrail;
the liquid feeding mechanism comprises a box body, a leather cup, a straight rod, a spring and a linear motor, the box body is arranged in an inner cavity of the clamping shell, a top cover is movably connected to the inner wall of the box body, the linear motor is arranged on the top surface of the clamping shell and drives a shaft to be connected with the top cover of the box body, one end of the straight rod is connected with the top cover of the box body, the other end of the straight rod penetrates through the bottom surface of the box body, the leather cup is sleeved in the straight rod, a large opening of the leather cup abuts against the bottom surface of the box body, and the;
the scrubbing mechanism comprises a scraping wheel, scraping and brushing sheets, cleaning cotton cloth and a first driving motor, the scraping wheel is arranged on the side wall of the inner cavity of the clamping shell and is perpendicular to the handrail belt, the scraping and brushing sheets are arranged on the circumferential surface of the scraping wheel at intervals and abut against the surface of the handrail belt, the first driving motor is arranged in the inner cavity of the clamping shell and drives the scraping wheel to rotate, and the cleaning cotton cloth is laid on the surface of the supporting block and abuts against the bottom surfaces of the two sides of the handrail belt;
the wiping mechanism comprises a cleaning roller, a detachable and washable cleaning cotton sleeve and a second driving motor, the cleaning roller is arranged on the side wall of the inner cavity of the clamping shell and is vertical to the hand strap, the detachable and washable cleaning cotton sleeve is sleeved in the cleaning roller and abuts against the surface of the hand strap, and the second driving motor is arranged in the inner cavity of the clamping shell and drives the cleaning roller to rotate;
the disinfection mechanism comprises an ultraviolet lamp tube, and the ultraviolet lamp tube is arranged in the inner cavity of the clamping shell and is positioned above the handrail;
the sewage collecting mechanism comprises a sewage collecting tank and an angle folding and sliding water tank, the sewage collecting tank is arranged on the side wall of the inner cavity of the clamping shell, one end of the angle folding and sliding water tank is connected with the sewage collecting tank, and the other end of the angle folding and sliding water tank is close to the surface of the handrail belt and is positioned below the rotation direction of the scraping wheel;
the liquid feeding mechanism, the brushing mechanism, the wiping mechanism and the disinfection mechanism are sequentially arranged in the clamping shell at intervals.
Furthermore, the device also comprises two magnetic seats which are respectively arranged on the inner sides of the two side walls of the bottom of the clamping shell.
Furthermore, the wiping mechanism further comprises a water suction roller, a squeezing roller and a sewage long groove, wherein the water suction roller and the squeezing roller are respectively arranged on the side wall of the inner cavity of the clamping shell, the roller surface of the water suction roller abuts against the detachable and washable cleaning cotton sleeve on the surface of the cleaning roller, the roller surface of the squeezing roller abuts against the roller surface of the water suction roller, and the sewage long groove is detachably arranged on the side wall of the inner cavity of the clamping shell and is positioned below the contact surface of the squeezing roller and the water suction roller.
Further, the sewage long groove is a transparent water groove.
Furthermore, the leather cups, the straight rods and the springs in the liquid feeding mechanism are in three groups and are arranged in the box body at intervals.
Furthermore, the number of the scraping and brushing sheets in the brushing mechanism is ten, and the scraping and brushing sheets are uniformly distributed on the circumferential surface of the scraping wheel at intervals.
Furthermore, the number of the ultraviolet lamp tubes in the disinfection mechanism is three, and the ultraviolet lamp tubes are ozone type ultraviolet lamp tubes.
Further, the whole of centre gripping casing is saddle-shaped casing, and it includes roof and two lateral walls, and the both ends of roof are located respectively on two lateral wall tops, and one of them lateral wall passes through the bolt and can dismantle the one end of being fixed in the roof.
The automatic cleaning device for the escalator handrail adopts the technical scheme, namely the device comprises a clamping shell, a liquid feeding mechanism, a scrubbing mechanism, a wiping mechanism, a sterilizing mechanism and a sewage collecting mechanism, wherein the clamping shell is clamped on a support plate below the handrail, supporting blocks positioned below the bottom surfaces of two sides of the handrail are arranged on two side walls of the middle part of the support plate, and cleaning cotton cloth is arranged on the supporting blocks; the liquid feeding mechanism consists of a box body, a leather cup, a straight rod, a spring and a linear motor; the scrubbing mechanism consists of a scraping wheel, a scraping and brushing sheet, cleaning cotton cloth and a first driving motor; the wiping mechanism consists of a cleaning roller, a detachable and washable cleaning cotton sleeve and a second driving motor; the disinfection mechanism is an ultraviolet lamp tube, and the sewage collection mechanism consists of a sewage collection tank and a bevel sliding water tank; the liquid feeding mechanism, the brushing mechanism, the wiping mechanism and the disinfection mechanism are arranged in the clamping shell at intervals in sequence. The device overcomes the defect of cleaning the traditional hand strap, realizes all-round cleaning of the hand strap, has a disinfection function, ensures the cleanness of the hand strap and avoids the potential safety hazard caused by the dirt of the hand strap.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic structural view of an automatic cleaning device for an escalator handrail of the present invention;
fig. 2 is a view from a-a of fig. 1.
Detailed Description
Embodiment as shown in fig. 1 and fig. 2, the automatic cleaning device for the escalator handrail comprises a clamping shell 1, a liquid feeding mechanism 2, a scrubbing mechanism 3, a wiping mechanism 4, a disinfecting mechanism 5 and a sewage collecting mechanism 6, wherein the bottom of the clamping shell 1 is open and clamped on a support plate below a handrail 7, the handrail 7 passes through the clamping shell 1, and two side walls in the middle of the clamping shell 1 are provided with support blocks 11 positioned below the bottom surfaces of two sides of the handrail 7;
the liquid feeding mechanism 2 comprises a box body 21, a leather cup 22, a straight rod 23, a spring 24 and a linear motor 25, the box body 21 is arranged in the inner cavity of the clamping shell 1, a top cover 26 is movably connected to the inner wall of the box body 21, the linear motor 25 is arranged on the top surface of the clamping shell 1, a driving shaft 27 is connected with the top cover 26 of the box body 21, one end of the straight rod 23 is connected with the top cover 26 of the box body 21, the other end of the straight rod passes through the bottom surface of the box body 21, the leather cup 22 is sleeved in the straight rod 23, a large opening of the leather cup abuts against the bottom surface of the box body 21, and the spring 24 is sleeved in the;
the brushing mechanism 3 comprises a scraping wheel 31, a scraping and brushing sheet 32, cleaning cotton cloth 33 and a first driving motor 34, the scraping wheel 31 is arranged on the side wall of the inner cavity of the clamping shell 1 and is vertical to the handrail belt 7, the scraping and brushing sheet 32 is arranged on the circumferential surface of the scraping wheel 31 at intervals and abuts against the surface of the handrail belt 7, the first driving motor 34 is arranged in the inner cavity of the clamping shell 1 and drives the scraping wheel 31 to rotate, and the cleaning cotton cloth 33 is laid on the surface of the supporting block 11 and abuts against the bottom surfaces of two sides of the handrail belt 7;
the wiping mechanism 4 comprises a cleaning roller 41, a detachable and washable cleaning cotton sleeve 42 and a second driving motor 43, the cleaning roller 41 is arranged on the side wall of the inner cavity of the clamping shell 1 and is perpendicular to the handrail belt 7, the detachable and washable cleaning cotton sleeve 42 is sleeved in the cleaning roller 41 and abuts against the surface of the handrail belt 7, and the second driving motor 43 is arranged in the inner cavity of the clamping shell 1 and drives the cleaning roller 41 to rotate;
the disinfection mechanism 5 comprises an ultraviolet lamp tube 51, and the ultraviolet lamp tube 51 is arranged in the inner cavity of the clamping shell 1 and is positioned above the handrail 7;
the sewage collecting mechanism 6 comprises a sewage collecting tank 61 and a bevel sliding-down water tank 62, the sewage collecting tank 61 is arranged on the side wall of the inner cavity of the clamping shell 1, one end of the bevel sliding-down water tank 62 is connected with the sewage collecting tank 61, and the other end of the bevel sliding-down water tank is close to the surface of the handrail 7 and is positioned below the rotation direction of the scraping wheel 31;
the liquid feeding mechanism 2, the brushing mechanism 3, the wiping mechanism 4 and the disinfecting mechanism 5 are sequentially arranged in the clamping shell 1 at intervals.
Preferably, the device further comprises two magnetic seats 8, and the two magnetic seats 8 are respectively arranged on the inner sides of the two side walls at the bottom of the clamping shell 1. The clamping shell 1 is reliably clamped on the supporting plate below the hand strap 7 through the magnetic seat 8, and the magnetism of the magnetic seat 8 is cut off through the knob 81 when the device is required to be disassembled, so that the clamping shell 1 can be disassembled from the hand strap 7.
Preferably, the wiping mechanism 4 further includes a water suction roller 44, a squeezing roller 45 and a sewage long groove 46, the water suction roller 44 and the squeezing roller 45 are respectively disposed on the sidewall of the inner cavity of the clamping housing 1, the roller surface of the water suction roller 44 abuts against the removable cleaning cotton sleeve 42 on the surface of the cleaning roller 41, the roller surface of the squeezing roller 45 abuts against the roller surface of the water suction roller 44, and the sewage long groove 46 is detachably disposed on the sidewall of the inner cavity of the clamping housing 1 and is located below the contact surface of the squeezing roller 44 and the water suction roller 45. The water absorbing roller and the squeeze roller can respectively adopt a PU sponge water absorbing roller and a rigid squeeze roller, the handrail belt is wiped to be dry, the detachable and washable cleaning cotton sleeve on the surface of the cleaning roller can absorb full water, and can drip if not cleared away in time, so the device adopts the water absorbing roller to absorb the water in the detachable and washable cleaning cotton sleeve, then the squeeze roller is adopted to extrude the water absorbing roller, the water in the water absorbing roller drips the sewage long groove through the squeeze roller, thereby the water dripping of the detachable and washable cleaning cotton sleeve is avoided, and the cleanness of a cleaning place is ensured.
Preferably, the sewage trough 46 is a transparent trough. The transparent water tank is convenient for visually observing the water level in the water tank and can be poured out in time before overflowing.
Preferably, the cup 22, the straight rod 23 and the spring 24 in the liquid feeding mechanism 2 are three groups and are arranged in the box body 21 at intervals.
Preferably, the number of the scraping and brushing blades 32 in the brushing mechanism 3 is ten and the scraping and brushing blades are evenly distributed on the circumferential surface of the scraping wheel 31 at intervals.
Preferably, the number of the ultraviolet lamps 51 in the sterilizing mechanism 5 is three and the ultraviolet lamps are ozone type ultraviolet lamps.
Preferably, the whole clamping shell 1 is a saddle-shaped shell, and includes a top plate 12 and two side walls, the top ends of the two side walls are respectively disposed at two ends of the top plate 12, and one side wall 13 is detachably fixed at one end of the top plate 12 through a bolt 14. The structure is convenient for installing the clamping shell to the hand strap and simultaneously facilitates the installation and maintenance of all parts in the clamping shell.
When the hand strap is cleaned, the clamping shell is clamped on the supporting plate below the hand strap, the hand strap penetrates through the inner cavity of the clamping shell, cleaning solution is injected into the box body of the liquid feeding mechanism, the cleaning solution flows into the inner cavity of the leather cup, the linear motor is started to press the top cover of the box body downwards, the top cover drives the straight rod to move downwards, the leather cup is extruded through the spring, and the cleaning solution in the leather cup flows out of the box body along the bottom end of the straight rod under the extrusion of the leather cup and drops to the surface of the hand; along with the movement of the hand strap, the hand strap on which the cleaning solution is dropped is moved to the position of a scraping wheel of the scrubbing mechanism, the scraping wheel is driven to rotate by a first driving motor, so that the surface of the hand strap is scrubbed by a scraping and brushing piece on the surface of the scraping wheel, the rotating direction of the scraping and brushing piece is opposite to the moving direction of the hand strap so as to obtain the maximum friction force, the best cleaning effect is achieved, the cleaning effect on the surface of the hand strap is improved due to the addition of the cleaning solution, and during the period, as the hand strap is usually arranged in an inclined manner, the scrubbed sewage foam flows into a sewage collecting tank through a bevel sliding water tank of the sewage collecting mechanism, so; when the hand strap moves to the wiping mechanism, the wiping mechanism drives the cleaning roller to rotate by the second driving motor, the cleaning cotton sleeve can be disassembled and cleaned to wipe off the water stains on the surface of the hand strap, and then the hand strap is disinfected by the ultraviolet lamp tube of the disinfecting mechanism, so that the hand strap is ensured to be clean. Meanwhile, in the operation process of the hand strap, the cleaning cotton cloth arranged on the surfaces of the supporting blocks on the two side walls in the middle of the clamping shell always wipes the bottom surfaces on the two sides of the hand strap so as to wash the hand strap in an all-around way and achieve the excellent cleaning effect on the hand strap. In practical application, the first driving motor and the second driving motor of the device can adopt one motor, and a single motor simultaneously drives the scraping wheel and the cleaning roller to synchronously rotate through the transmission mechanism so as to wash and dry the handrail belt, so that the manufacturing cost of the device is reduced.
The device can realize the completion of cleaning work on the handrail belt in the running process of the escalator, the cleaning comprises the surface of the handrail belt and dead corners of the bottom surfaces of two sides, the cleaning effect of the handrail belt is improved by liquid feeding, scrubbing, wiping and disinfecting, the cleanness of the handrail belt is ensured, and the potential safety hazard caused by unwilling to hold due to the dirt of the handrail belt when the escalator stands is avoided.
Claims (8)
1. The utility model provides an automatic cleaning device for escalator handrail area which characterized in that: the hand-held cleaning machine comprises a clamping shell, a liquid feeding mechanism, a scrubbing mechanism, a wiping mechanism, a disinfecting mechanism and a sewage collecting mechanism, wherein the bottom of the clamping shell is provided with an opening and is clamped on a supporting plate below a hand strap, the hand strap passes through the clamping shell, and two side walls in the middle of the clamping shell are provided with supporting blocks positioned below the bottom surfaces of two sides of the hand strap;
the liquid feeding mechanism comprises a box body, a leather cup, a straight rod, a spring and a linear motor, the box body is arranged in an inner cavity of the clamping shell, a top cover is movably connected to the inner wall of the box body, the linear motor is arranged on the top surface of the clamping shell and drives a shaft to be connected with the top cover of the box body, one end of the straight rod is connected with the top cover of the box body, the other end of the straight rod penetrates through the bottom surface of the box body, the leather cup is sleeved in the straight rod, a large opening of the leather cup abuts against the bottom surface of the box body, and the;
the scrubbing mechanism comprises a scraping wheel, scraping and brushing sheets, cleaning cotton cloth and a first driving motor, the scraping wheel is arranged on the side wall of the inner cavity of the clamping shell and is perpendicular to the handrail belt, the scraping and brushing sheets are arranged on the circumferential surface of the scraping wheel at intervals and abut against the surface of the handrail belt, the first driving motor is arranged in the inner cavity of the clamping shell and drives the scraping wheel to rotate, and the cleaning cotton cloth is laid on the surface of the supporting block and abuts against the bottom surfaces of the two sides of the handrail belt;
the wiping mechanism comprises a cleaning roller, a detachable and washable cleaning cotton sleeve and a second driving motor, the cleaning roller is arranged on the side wall of the inner cavity of the clamping shell and is vertical to the hand strap, the detachable and washable cleaning cotton sleeve is sleeved in the cleaning roller and abuts against the surface of the hand strap, and the second driving motor is arranged in the inner cavity of the clamping shell and drives the cleaning roller to rotate;
the disinfection mechanism comprises an ultraviolet lamp tube, and the ultraviolet lamp tube is arranged in the inner cavity of the clamping shell and is positioned above the handrail;
the sewage collecting mechanism comprises a sewage collecting tank and an angle folding and sliding water tank, the sewage collecting tank is arranged on the side wall of the inner cavity of the clamping shell, one end of the angle folding and sliding water tank is connected with the sewage collecting tank, and the other end of the angle folding and sliding water tank is close to the surface of the handrail belt and is positioned below the rotation direction of the scraping wheel;
the liquid feeding mechanism, the brushing mechanism, the wiping mechanism and the disinfection mechanism are sequentially arranged in the clamping shell at intervals.
2. The automatic cleaning device for escalator handrail according to claim 1, characterized in that: the device further comprises two magnetic seats, wherein the two magnetic seats are respectively arranged on the inner sides of the two side walls of the bottom of the clamping shell.
3. The automatic cleaning device for an escalator handrail according to claim 1 or 2, characterized in that: the wiping mechanism further comprises a water suction roller, a squeezing roller and a sewage long groove, the water suction roller and the squeezing roller are respectively arranged on the side wall of the inner cavity of the clamping shell, the roller surface of the water suction roller abuts against the detachable and washable cleaning cotton sleeve on the surface of the cleaning roller, the roller surface of the squeezing roller abuts against the roller surface of the water suction roller, and the sewage long groove is detachably arranged on the side wall of the inner cavity of the clamping shell and is positioned below the contact surface of the squeezing roller and the water suction roller.
4. The automatic cleaning device for escalator handrail according to claim 3, characterized in that: the sewage long groove is a transparent water groove.
5. The automatic cleaning device for escalator handrail according to claim 3, characterized in that: the leather cups, the straight rods and the springs in the liquid feeding mechanism are divided into three groups and are arranged in the box body at intervals.
6. The automatic cleaning device for escalator handrail according to claim 3, characterized in that: the number of the scraping and brushing pieces in the brushing mechanism is ten, and the scraping and brushing pieces are uniformly distributed on the circumferential surface of the scraping wheel at intervals.
7. The automatic cleaning device for escalator handrail according to claim 3, characterized in that: the number of the ultraviolet lamp tubes in the disinfection mechanism is three, and the ultraviolet lamp tubes are ozone type ultraviolet lamp tubes.
8. The automatic cleaning device for escalator handrail according to claim 3, characterized in that: the whole of centre gripping casing is saddle-shaped casing, and it includes roof and two lateral walls, and the both ends of roof are located respectively to two lateral wall tops, and one of them lateral wall passes through the bolt and can dismantle the one end of being fixed in the roof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810857569.8A CN108840214B (en) | 2018-07-31 | 2018-07-31 | Automatic cleaning device for escalator handrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810857569.8A CN108840214B (en) | 2018-07-31 | 2018-07-31 | Automatic cleaning device for escalator handrail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108840214A CN108840214A (en) | 2018-11-20 |
| CN108840214B true CN108840214B (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810857569.8A Active CN108840214B (en) | 2018-07-31 | 2018-07-31 | Automatic cleaning device for escalator handrail |
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| CN (1) | CN108840214B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110371836B (en) * | 2019-07-30 | 2020-11-24 | 常熟理工学院 | Device capable of sterilizing escalator hand strap |
| CN110510492B (en) * | 2019-09-28 | 2020-10-23 | 温州鸿业健身器材有限公司 | Elevator handrail cleaning and disinfecting equipment |
| CN111186759A (en) * | 2020-02-28 | 2020-05-22 | 广东职业技术学院 | Elevator handrail cleaner |
| CN111217228A (en) * | 2020-03-17 | 2020-06-02 | 中国计量大学 | Staircase disinfection structure and staircase degassing unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201631729U (en) * | 2010-01-06 | 2010-11-17 | 石尧 | Cleaning sterilizing device for elevator handrails |
| KR101289393B1 (en) * | 2010-01-25 | 2013-07-29 | 임미숙 | Handrail cleaning apparatus |
| JP5564362B2 (en) * | 2010-08-25 | 2014-07-30 | 三菱電機株式会社 | Handrail sanitizer for man conveyor |
| CN201825632U (en) * | 2010-10-25 | 2011-05-11 | 叶尔肯·拜山 | Disinfecting device for staircase armrest |
| TWM489160U (en) * | 2014-06-26 | 2014-11-01 | Gao Yan-Hui | Power-free escalator UV sterilization machine |
| CN106429778A (en) * | 2016-12-07 | 2017-02-22 | 郑州特别有效营销管理咨询有限公司 | Modernized device for cleaning elevator handrail belts |
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2018
- 2018-07-31 CN CN201810857569.8A patent/CN108840214B/en active Active
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| CN108840214A (en) | 2018-11-20 |
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