CN206457158U - Escalator, moving sidewalk and comb tooth device - Google Patents
Escalator, moving sidewalk and comb tooth device Download PDFInfo
- Publication number
- CN206457158U CN206457158U CN201621463912.3U CN201621463912U CN206457158U CN 206457158 U CN206457158 U CN 206457158U CN 201621463912 U CN201621463912 U CN 201621463912U CN 206457158 U CN206457158 U CN 206457158U
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- CN
- China
- Prior art keywords
- contact
- switch
- teeth portion
- comb tooth
- safe
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model is related to a kind of escalator, moving sidewalk and comb tooth device.Comb tooth device includes fishback, there is the teeth portion that left and right is intervally arranged on front side of fishback, it is each provided with being connected with the wiring construction of the controller for electrically connecting control escalator or moving sidewalk start and stop in each teeth portion by external force on the safety contact or switch for the on off operating mode change when being extruded, safety contact or switch.Teeth portion is by foreign matter after the conflict in front; safety contact or switch in teeth portion are squeezed; so that safety contact or switch triggering; safety contact or switch send trigger signal by wiring construction to the controller of escalator or moving sidewalk; controller control elevator is stopped transport; to realize the shutdown of escalator or moving sidewalk so that the sensitivity of escalator safe stop is higher.
Description
Technical field
The utility model is related to a kind of escalator, moving sidewalk and comb tooth device.
Background technology
With escalator widely using in the crowd is dense the place such as market, airport, station, subway, fishback squeezes folder
Children's event happens occasionally.Traditional fishback is that metal material is made, when less foreign matter is caught in broach, is not extruded
Shearing, is exactly to spin in situ.In the step with escalator（Metal）Fragile broach is collided when being shifted over, China formulates
Escalator manufacture national standard GB16899-2011 5.7.3.2.6 in provide, " if any the fashionable broach of foreign matter it is not deformed when, comb
Tooth and step collide and escalator should be made out of service ", this allows escalator power out of service, and national standard is not specific
Provide, when producer's general provision is applied to 1500 ~ 1700N of power of fishback, escalator can just act protection switch, this
Power has been far longer than the towed extrusion shearing power such as hand, pin, clothing, debris, the broach of people, easily causes personal injury and equipment
Accident.
The U of Chinese patent literature CN 204138117 disclose a kind of anti-pinch and saved oneself pedal for escalator, including step and pedal,
Pedal is made up of substrate and cover plate, and each broach on the broach and cover plate on substrate is respectively protruding into the ditch of corresponding step
In groove, and the easily-folding line at the root position in broach, the tooth root of each broach of easily-folding line series connection, with ladder are provided with the cover board
When surprisingly being clamped at rank, the broach stress of the front end of cover plate, broach arches upward or disconnected upwards from easily-folding line, and by folder, personnel take off
Go out；Meanwhile, compress compressing switch using shifting after cover plate and drive the whole escalator of stop.But arched upward in the broach of cover plate from easily-folding line
Or disconnect and cover plate not afterwards move in the case of, escalator is still within running status, and this allows for what is clamped by cover plate broach
Article or personnel still can not be completely free of from escalator, also just be still within precarious position, however it remains be helped automatically
The threat that ladder is clamped.Therefore it is badly in need of a kind of escalator comb tooth device of safe contact formula on escalator, the device is working as people
Hand, pin, clothing, debris etc. when being caught in broach and step or pedal site of engagement accidentally, and step and pedal deformation or shifting
During position, by the power of very little（Such as 10 Ns or so external force）It can prevent from making the person and equipment to make escalator stop
Into injury.
Utility model content
The utility model aims to provide a kind of when the hand of people, pin, clothing, debris etc. are caught in broach and step accidentally or step on
, can be by the comb tooth device of escalator stop during plate site of engagement, should while additionally providing a kind of use in the utility model
The escalator and moving sidewalk of comb tooth device.
In order to solve the above technical problems, the technical scheme of comb tooth device is as follows in the utility model：
Have on front side of comb tooth device, including fishback, fishback and each set in the teeth portion that left and right is intervally arranged, each teeth portion
Have and be connected with the safety contact or switch for the on off operating mode change when being extruded by external force, safety contact or switch for electricity
The wiring construction of connection control escalator or the controller of moving sidewalk start and stop.
It is preferred that, at the tooth top position of safety contact or switch in teeth portion.
It is preferred that, safety contact is each provided with each teeth portion, safety contact is by for relative when being extruded by external force
Mobile and dynamic, fixed contact composition the normally-closed contact that disconnects or moved by the engagement for the relative movement when being extruded by external force,
The normally opened contact of fixed contact composition, fixed contact is fixedly installed relative to teeth portion, and movable contact can be forwardly and/or backwardly relative to teeth portion
It is mobile to set.
It is preferred that, safe tabletting is additionally provided with teeth portion, safe tabletting is what soft material was made, and safe tabletting is installed in tooth
In portion, safe tabletting has the fixed part being installed in teeth portion, and cryptomere or hole in front of fixed part are provided with safe tabletting
The cavity of shape or channel-shaped, the entity part of safe tabletting front end can be pressed backward for being used in front of cavity when external force is extruded
The triggering position of contracting cavity deformation, the movable contact is in the front side cavity wall of cavity, and the fixed contact is in the rear side of cavity
In cavity wall.
It is preferred that, safe tabletting, which also has, is overhung at the suspending part of the teeth portion left and right sides, adjacent two safe tabletting it is hanging
Portion formed for adaptation step or pedal double wedge insertion and can fore-aft travel cooperation teeth groove.
It is preferred that, movable contact is the linear or face shape contact extended in left-right direction, and fixed contact has two and is divided into mutually
The positive and negative electrode contact of the point type of disconnection, the axis of the line of positive and negative electrode contact parallel to movable contact.
It is preferred that, safety contact or switch each safety contact or switch parallel with one another to be open in usual, each safety contact or open
The wiring construction of pass is separate parallel wiring construction.
It is preferred that, safety contact or switch are normally closed type, all safety contacts or switch from left to right or from right to left according to
It is secondary series connection and form switch series, the wiring construction is divided into the internal structure between adjacent two safety contact or normally closed switch
With the Circumscribed structure in the switch series two ends.
The technical scheme of escalator is as follows in the utility model：
Engagement is provided with comb tooth device, comb tooth device at escalator, including multiple steps, the import and export position of step
Have including fishback, on front side of fishback and be each provided with being used to squeeze by external force in the teeth portion that left and right is intervally arranged, each teeth portion
It is connected with off operating mode changes during pressure safety contact or switch, safety contact or switch for electrically connecting control escalator
Or the wiring construction of the controller of moving sidewalk start and stop.
It is preferred that, at the tooth top position of safety contact or switch in teeth portion.
It is preferred that, safety contact is each provided with each teeth portion, safety contact is by for relative when being extruded by external force
Mobile and dynamic, fixed contact composition the normally-closed contact that disconnects or moved by the engagement for the relative movement when being extruded by external force,
The normally opened contact of fixed contact composition, fixed contact is fixedly installed relative to teeth portion, and movable contact can be forwardly and/or backwardly relative to teeth portion
It is mobile to set.
It is preferred that, safe tabletting is additionally provided with teeth portion, safe tabletting is what soft material was made, and safe tabletting is installed in tooth
In portion, safe tabletting has the fixed part being installed in teeth portion, and cryptomere or hole in front of fixed part are provided with safe tabletting
The cavity of shape or channel-shaped, the entity part of safe tabletting front end can be pressed backward for being used in front of cavity when external force is extruded
The triggering position of contracting cavity deformation, the movable contact is in the front side cavity wall of cavity, and the fixed contact is in the rear side of cavity
In cavity wall.
It is preferred that, safe tabletting, which also has, is overhung at the suspending part of the teeth portion left and right sides, adjacent two safe tabletting it is hanging
Portion formed for adaptation step or pedal double wedge insertion and can fore-aft travel cooperation teeth groove.
It is preferred that, movable contact is the line contact extended in left-right direction, and fixed contact has two and is divided into what is mutually disconnected
The positive and negative electrode contact of point type, the axis of the line of positive and negative electrode contact parallel to movable contact.
It is preferred that, safety contact or switch each safety contact or switch parallel with one another to be open in usual, each safety contact or open
The wiring construction of pass is separate parallel wiring construction.
It is preferred that, safety contact or switch are normally closed type, all safety contacts or switch from left to right or from right to left according to
It is secondary series connection and form switch series, the wiring construction is divided into the internal structure between adjacent two safety contact or normally closed switch
With the Circumscribed structure in the switch series two ends.
The technical scheme of moving sidewalk is as follows in the utility model：
Moving sidewalk, includes being provided with comb tooth device at the pedal for the conveying that moves in circles, the import and export position of pedal,
Comb tooth device includes being each provided with being used in the teeth portion that there is left and right to be intervally arranged on front side of fishback, fishback, each teeth portion
It is connected with off operating mode changes when being extruded by external force safety contact or switch, safety contact or switch for electrically connecting control
The wiring construction of escalator or the controller of moving sidewalk start and stop.
It is preferred that, at the tooth top position of safety contact or switch in teeth portion.
It is preferred that, safety contact is each provided with each teeth portion, safety contact is by for relative when being extruded by external force
Mobile and dynamic, fixed contact composition the normally-closed contact that disconnects or moved by the engagement for the relative movement when being extruded by external force,
The normally opened contact of fixed contact composition, fixed contact is fixedly installed relative to teeth portion, and movable contact can be forwardly and/or backwardly relative to teeth portion
It is mobile to set.
It is preferred that, safe tabletting is additionally provided with teeth portion, safe tabletting is what soft material was made, and safe tabletting is installed in tooth
In portion, safe tabletting has the fixed part being installed in teeth portion, and cryptomere or hole in front of fixed part are provided with safe tabletting
The cavity of shape or channel-shaped, the entity part of safe tabletting front end can be pressed backward for being used in front of cavity when external force is extruded
The triggering position of contracting cavity deformation, the movable contact is in the front side cavity wall of cavity, and the fixed contact is in the rear side of cavity
In cavity wall.
It is preferred that, safe tabletting, which also has, is overhung at the suspending part of the teeth portion left and right sides, adjacent two safe tabletting it is hanging
Portion formed for adaptation step or pedal double wedge insertion and can fore-aft travel cooperation teeth groove.
It is preferred that, movable contact is the line contact extended in left-right direction, and fixed contact has two and is divided into what is mutually disconnected
The positive and negative electrode contact of point type, the axis of the line of positive and negative electrode contact parallel to movable contact.
It is preferred that, safety contact or switch each safety contact or switch parallel with one another to be open in usual, each safety contact or open
The wiring construction of pass is separate parallel wiring construction.
It is preferred that, safety contact or switch are normally closed type, all safety contacts or switch from left to right or from right to left according to
It is secondary series connection and form switch series, the wiring construction is divided into the internal structure between adjacent two safety contact or normally closed switch
With the Circumscribed structure in the switch series two ends.
The shutdown of escalator is performed under the control of safety contact or switch in the utility model, and teeth portion is by different
Thing is after the conflict in front, and safety contact or switch in teeth portion are squeezed so that safety contact or switch triggering, and safety is touched
Point or switch send trigger signal, controller control elevator by wiring construction to the controller of escalator or moving sidewalk
Stop transport, to realize the shutdown of escalator or moving sidewalk, compared with prior art in need to promote whole fishback to be moved back by
Dynamic situation, eliminates intermal force of the fishback between foreign matter and trigger switch, so that when the hand of people, pin, clothing, debris
During Deng being caught in broach with step or pedal site of engagement accidentally, and when step and pedal deformation or displacement, it will can help automatically
Terraced stop so that the sensitivity of escalator safe stop is higher.
Further, the suspending part formation of adjacent two safe tablettings is inserted for the double wedge of adaptation step or pedal and can be front and rear
The cooperation teeth groove of activity, so when deflection occur in the step or pedal of adaptation, the double wedge on step or pedal can touch peace
Suspending part on total head piece, can also trigger safety contact, realize the stoppage in transit of escalator or moving sidewalk, to avoid helping automatically
Ladder or moving sidewalk race it is oblique caused by security incident.
Brief description of the drawings
Fig. 1 is the broach engaging structure schematic diagram of escalator embodiment 1 in the utility model；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is the partial enlarged drawing at B in Fig. 2；
Fig. 4 is Fig. 2 C-C sectional views；
Fig. 5 is Fig. 1 D-D sectional views；
Fig. 6 is Fig. 5 E-E sectional views；
Fig. 7 is the partial enlarged drawing at F in Fig. 6；
Fig. 8 is the structural representation of comb tooth device in Fig. 1；
Fig. 9 is the broach engaging structure schematic diagram of escalator embodiment 2 in the utility model；
Figure 10 is Fig. 9 G-G sectional views；
Figure 11 is Figure 10 H-H sectional views；
Figure 12 is Fig. 9 I-I sectional views；
Figure 13 is the structural representation of comb tooth device in Fig. 9.
Embodiment
Describe the utility model in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not rushing
In the case of prominent, the feature in embodiment and embodiment in the utility model can be mutually combined.
The embodiment 1 of escalator in the utility model：As shown in Figures 1 to 8, the escalator includes multiple steps
101, comb tooth device, pectination teeth portion and the double wedge on step 101 of comb tooth device are provided with the import and export position of step 101
Intermeshing.
Comb tooth device includes fishback 103, and the front side of fishback 103 is provided with the teeth portion 131 for the pectination that left and right is intervally arranged,
Injection is installed with the safe tabletting 104 that abrasive rubber or wear-resistant plastic material are made, safe tabletting 104 in each teeth portion 131
The fixed part 141 being installed in coincideing on the surface of teeth portion 131, is provided with the capsule being between fixed part 141 in safe tabletting 104
The cavity 142 of shape, the front of cavity 142 is provided with the triggering position 143 formed by the entity of safe tabletting 104, the triggering position
143 can deform to rear compaction cavum 142 after being squeezed.The on off operating mode when being extruded by external force is provided with cavity 142 to change
Safety contact 105, safety contact 105 is by the movable contact 151 that is installed in the front side cavity wall of cavity 142 and is installed in cavity
The normally opened contact that fixed contact 152 in 142 rear side cavity walls is constituted, so that fixed contact 152 is fixedly installed relative to teeth portion 131, is moved
Contact 151 can be moved rearwards by setting relative to teeth portion 131.Each safety contact 105 is parallel with one another, the wiring of safety contact 105
Structure is the parallel wiring construction separate relative to the wiring construction of other safety contacts 105.Movable contact 151 is along left and right
The line contact of direction extension, fixed contact 152 has two and is divided into the positive and negative electrode contact of the point type mutually disconnected, positive and negative electrode
Axis of the line of contact parallel to movable contact 151.
Safe tabletting 104 also has the suspending part 144 for being overhung at the left and right sides of teeth portion 131, the suspending part of safe tabletting 104
144 are symmetrically distributed in the left and right sides of fixed part 141, i.e., the suspending part 144 and fixed part 141 of safe tabletting 104 are left extremely at oneself
The right side is alternately distributed.The formation of suspending part 144 of adjacent two safe tabletting 104 is inserted for the double wedge of adaptation step 101 and can be front and rear living
Dynamic cooperation teeth groove, the cooperation teeth groove had both reduced the space width between two teeth portion 131 originally, and double wedge and comb are will not interfere with again
Intermeshing between tooth.
Fixed part 141 is divided into the bottom 1411 being attached on the bottom surface of teeth portion 131 and the top being attached on the top surface of teeth portion 131 again
Layer 1412, the triggering transition of position 143 is arranged between bottom 1411 and top layer 1412, and the triggering position 143 is overhung at admittedly
Determine before portion 141, cavity 142 is at the position between bottom and triggering position 143.
Wiring construction is conductive lead wire, and conductive lead wire extends and prolonged along the bottom surface of teeth portion 131 after the extraction of fixed contact 152
Extend the back side of fishback 103.
When escalator or moving sidewalk are run, there is relative fortune broach and the engagement place of step 101 of the comb tooth device
OK, when the hand of people, pin, clothing, debris etc. are caught in broach and the site of engagement of step 101 accidentally, or between broach and step 101
When appearance is deformed or shifted, the triggering position 143 of safe tabletting 104 will be squeezed, when pressure reaches 10N or so, by
Cause movable contact 151 to be moved rearwards by relative to fixed contact 152 in the deformation of soft material, realize that the on off operating mode of normally opened contact changes
Become, the input point of Triggering Control System, cut off safety return circuit electric current, reach the purpose for stopping ladder, prevent from causing the person and equipment
Injury.The device uses the trigger voltage of safety contact 105 for 24V direct currents, belongs to safe voltage, and the people of contact is not hindered
Evil.
In addition, when broach and the engaging piece of step 101 occur relatively crooked, step 101 can press the peace on fishback 103
The suspending part 144 of total head piece 104 so that oppressed and realized in the triggering position 143 on the fixed part 141 of safe tabletting 104
The closure of safety contact 105, is realized and shuts down, thus the comb tooth device is also prevented from escalator because assembling, operation troubles
It is crooked etc. fishback caused by factor 103.
The embodiment 2 of escalator in the utility model：The present embodiment and the difference of embodiment 1 be, such as Fig. 9 to Figure 13
Shown, each safe tabletting 204 is screwed onto in the teeth portion 231 of fishback 203 by the screw 206 being distributed before and after two, the peace
Total head piece 204 is the sheet being coincide with the bottom surface of teeth portion 231, i.e., the fixed part 241 of safe tabletting 204 and the cross section of suspending part 244
It is identical.The triggering position 243 of safe tabletting 204 is concordant with the front end of teeth portion 231.Cavity 242 is in the front of two screws 206.
The embodiment 3 of escalator in the utility model：The difference of the present embodiment and above-described embodiment is that fixed contact is solid
Be located in the top chamber wall of cavity, movable contact is installed in the bottom chamber wall of cavity, and move, the mutual conductive contact of fixed contact and
Constitute normally-closed contact, the rear portion of cavity is reserved with the avoidance region for being moved after movable contact, with the triggering position of safe tabletting by
To after extruding, movable contact can be moved rearwards by relative to fixed contact dislocation, and open the normally-closed contact.Meanwhile, all safety contacts
It is sequentially connected in series from left to right or from right to left and forms switch series, the wiring construction is divided into adjacent two safety contact or normal
Internal structure between make and break pass and the Circumscribed structure in the switch series two ends.
The other embodiment of escalator in the utility model：Cavity in safe tabletting can also be poroid or channel-shaped.
Safety contact can also be on the stage casing of teeth portion or back segment, can be by extending contact as the triggering mode of safety contact
Triggering position mode is realized.Safety contact can also be replaced with safety switch, and the safety switch can be that microswitch, stroke are opened
Pass, proximity switch etc..Each fixed contact can also be on the trigger unit of same belt, the belt length and broach of the trigger unit
The left and right length of plate is consistent, and the escape groove or opening inserted for cooperation broach are provided with the bottom surface of trigger unit.
The embodiment of moving sidewalk in the utility model：This voluntarily includes the pedal for the conveying that moves in circles in pavement, steps on
Comb tooth device, the structure phase of the structure of comb tooth device and comb tooth device in above-described embodiment are provided with the import and export position of plate
Together, therefore repeat no more.
The embodiment of comb tooth device in the utility model：Combed in the present embodiment in the structure and above-described embodiment of comb tooth device
The structure of tooth device is identical, therefore repeats no more.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model
The spirit and scope of scheme.
Claims (10)
1. there is the teeth portion that left and right is intervally arranged, it is characterised in that Mei Gechi on front side of comb tooth device, including fishback, fishback
It is each provided with connecting on the safety contact or switch for the on off operating mode change when being extruded by external force, safety contact or switch in portion
It is connected to the wiring construction of the controller for electrically connecting control escalator or moving sidewalk start and stop.
2. comb tooth device according to claim 1, it is characterised in that the tooth top position of safety contact or switch in teeth portion
Place.
3. comb tooth device according to claim 1, it is characterised in that be each provided with safety contact in each teeth portion, safety
Contact be by disconnection is moved, fixed contact is constituted the normally-closed contact for the relative movement when being extruded by external force or by for by
Dynamic, fixed contact composition the normally opened contact for relatively moving and engaging when external force is extruded, fixed contact is fixedly installed relative to teeth portion, moved
Contact can forwardly and/or backwardly move setting relative to teeth portion.
4. comb tooth device according to claim 3, it is characterised in that safe tabletting is additionally provided with teeth portion, safe tabletting is
What soft material was made, safe tabletting is installed in teeth portion, and safe tabletting has the fixed part being installed in teeth portion, safe tabletting
In be provided with cryptomere or poroid or channel-shaped cavity in front of the fixed part, the entity part of safe tabletting front end is in cavity
Front be used for when external force extrude can backward compaction cavum deformation triggering position, the movable contact in cavity front side chamber
On wall, the fixed contact is in the rear side cavity wall of cavity.
5. comb tooth device according to claim 4, it is characterised in that safe tabletting, which also has, is overhung at the teeth portion left and right sides
Suspending part, the suspending part formation of adjacent two safe tabletting for adaptation step or pedal double wedge insertion and can fore-aft travel match somebody with somebody
Close teeth groove.
6. comb tooth device according to claim 3, it is characterised in that movable contact is the linear or face extended in left-right direction
Shape contact, fixed contact has two and is divided into the positive and negative electrode contact of the point type mutually disconnected, the line of positive and negative electrode contact parallel to
The axis of movable contact.
7. comb tooth device as claimed in any of claims 1 to 6, it is characterised in that safety contact or switch are normal
Open type, each safety contact or switch are parallel with one another, and the wiring construction of each safety contact or switch is separate parallel wiring
Structure.
8. comb tooth device as claimed in any of claims 1 to 6, it is characterised in that safety contact or switch are normal
Enclosed, all safety contacts or switchs and is sequentially connected in series from left to right or from right to left and forms switch series, the wiring construction point
For the internal structure between adjacent two safety contact or normally closed switch and the Circumscribed structure in the switch series two ends.
9. engagement is provided with as in above-mentioned claim 1 to 8 at escalator, including multiple steps, the import and export position of step
Comb tooth device described in any one.
10. moving sidewalk, includes being provided with such as above-mentioned right at the pedal for the conveying that moves in circles, the import and export position of pedal
It is required that the comb tooth device in 1 to 8 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621463912.3U CN206457158U (en) | 2016-12-29 | 2016-12-29 | Escalator, moving sidewalk and comb tooth device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621463912.3U CN206457158U (en) | 2016-12-29 | 2016-12-29 | Escalator, moving sidewalk and comb tooth device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206457158U true CN206457158U (en) | 2017-09-01 |
Family
ID=59697028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621463912.3U Withdrawn - After Issue CN206457158U (en) | 2016-12-29 | 2016-12-29 | Escalator, moving sidewalk and comb tooth device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206457158U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106586797A (en) * | 2016-12-29 | 2017-04-26 | 袁江 | Escalator, automatic passenger conveyor and comb tooth device |
| CN110282530A (en) * | 2019-06-20 | 2019-09-27 | 西屋电梯有限公司 | A kind of escalator extra brake devices |
-
2016
- 2016-12-29 CN CN201621463912.3U patent/CN206457158U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106586797A (en) * | 2016-12-29 | 2017-04-26 | 袁江 | Escalator, automatic passenger conveyor and comb tooth device |
| CN110282530A (en) * | 2019-06-20 | 2019-09-27 | 西屋电梯有限公司 | A kind of escalator extra brake devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170901 Effective date of abandoning: 20180717 |