CN112919295A - Escalator with safety system - Google Patents
Escalator with safety system Download PDFInfo
- Publication number
- CN112919295A CN112919295A CN202011414911.0A CN202011414911A CN112919295A CN 112919295 A CN112919295 A CN 112919295A CN 202011414911 A CN202011414911 A CN 202011414911A CN 112919295 A CN112919295 A CN 112919295A
- Authority
- CN
- China
- Prior art keywords
- escalator
- guide rail
- strain gauge
- gauge strip
- preparation
- 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.)
- Pending
Links
- 230000007704 transition Effects 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 9
- 230000003213 activating effect Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B25/00—Control of escalators or moving walkways
- B66B25/006—Monitoring for maintenance or repair
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B29/00—Safety devices of escalators or moving walkways
- B66B29/005—Applications of security monitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B25/00—Control of escalators or moving walkways
- B66B25/003—Methods or algorithms therefor
Abstract
The invention relates to an escalator (10) having at least one guide rail (12), a plurality of steps (13) which can be moved along the guide rail (12), transition zones (11) in the lower escalator zone and in the upper escalator zone, respectively, and a safety system (20) which is designed to trigger a stop of the escalator (10) when at least one of the steps (13) is lifted off the guide rail (12), in particular in the transition zone (11). The safety system (20) has in particular a strain gauge strip (23) which is arranged on the guide rail (12). The strain gauge strip (23) is arranged on the guide rail (12), in particular in the transition region (11). The invention further relates to a method for starting an emergency stop of such an escalator (10). Especially when at leastThe lifting of a step (13) causes a force (F) to act on the strain gauge strip (23)O) The escalator (10) is stopped when changed.
Description
Technical Field
The present invention relates to an escalator comprising at least one guide rail and a plurality of steps, which are movable along the guide rail. In addition, the escalator has transition regions in the lower escalator region and in the upper escalator region, respectively. Furthermore, the escalator comprises a safety system which is designed to trigger the stopping of the escalator when at least one of the steps is lifted from the guide rail, in particular in the transition region.
The invention also relates to a method for starting an emergency stop of an escalator.
Background
The escalator comprises a transport zone and at the lower end and the upper end of the escalator a transition zone and a circulation zone, respectively. The transition region here denotes a part of the escalator in which the steps of the escalator are transferred from the transport region to the circulation region or, conversely, in which the people are transported and in which the steps are rotated. In particular, the transition region represents a region of the escalator in which the steps of the escalator are transferred from the stair shape into the horizontal plane or vice versa.
In this transition area it may occur that objects get wedged between the two escalator steps. In this case, the escalator steps that hit the wedged object are lifted.
During continuous operation of the escalator, the subsequent escalator steps are also lifted from their position as a result of this lifting of the escalator steps. In this state, the escalator steps cannot be guided in their endless track under the upper or lower landing of the escalator and hit against this landing. This results in significant damage to the escalator.
Known safety systems for escalators are integrated in the guide rails of the escalator at the transition region of the escalator. Known safety systems comprise a lever which is held in a specific position by a spring. If an object wedges between two escalator steps such that the escalator steps are lifted from the guide rail in the transition region, the escalator steps tilt and exert a force on the lever. The lever is actuated if the force exerted by the escalator step on the lever is greater than the return force of the spring acting on the lever in the opposite direction. The escalator is stopped by actuating a lever to trigger a switch.
The safety systems known from the prior art have several disadvantages. The guide rail must therefore be opened at the transition area of the escalator in order to integrate the safety system into the guide rail. Furthermore, resetting the safety system into the ready position after triggering is very laborious. Furthermore, the maintenance costs of the safety system are very high, since, for example, the spring is loosened as a result of the triggering of the safety system and the return force of the spring changes as a result.
Disclosure of Invention
Against this background, the object of the invention is to improve the safety system described at the outset and to improve the method for starting an emergency stop of an escalator. The safety system should have a simple construction. In particular, the security system should be easy to install and easy to maintain.
In order to achieve the object, an escalator and a method for starting an emergency stop according to the independent claims are proposed. Further advantageous embodiments of the invention are described in the dependent claims and in the description and are shown in the exemplary embodiments shown in the drawings.
The proposed solution provides an escalator comprising at least one guide rail and a plurality of steps, which are movable along the guide rail. The escalator furthermore comprises a transition region in the lower escalator region and a transition region in the upper escalator region. Furthermore, the escalator comprises a safety system configured to trigger a stop of the escalator when at least one of the steps is lifted from the guide rail, in particular in the transition area. In particular, the safety system comprises a strain gauge strip. In particular, the strain gauge strip is arranged on the guide rail. In particular, the strain gauge strip is arranged on the rail in the transition region.
In one embodiment, the guide rail has an upper edge and a lower edge. In particular, the guide rail has an upper edge and a lower edge in the transition region. In particular, the top side of the lower edge serves as an active surface for the step roller of the at least one step.
In particular, the guide rail with the upper and lower edge is designed in two parts.
In particular, the guide rail is constructed in three pieces, wherein the guide rail has an upper edge, a lower edge and side edges.
In particular, the guide rail has a C-shape. In particular the guide rail is C-shaped in the transition region. In particular the C-shaped guide rail comprises an upper edge, a side edge and a lower edge. In particular, the side edges connect the upper edge to the lower edge. In particular, the guide rail is shaped such that the step rollers of the steps are guided along the lower edge inside the C-shaped guide rail.
By guiding the step rollers inside a guide rail having an upper edge and a lower edge, the steps can be guided particularly stably. In particular, the step is prevented in this way from being completely lifted out of its position when it is lifted from the guide rail. Therefore, the readjustment (readjustment) of the rungs is significantly simplified.
In one embodiment, the strain gauge strip is arranged on the inner side of the guide rail. In particular, the strain gauge strips are arranged on the inner side of the guide rail. In particular, the strain gauge strip is arranged on the underside of the upper edge of the guide rail. In particular, the strain gauge strip is arranged on the top side of the lower edge of the guide rail.
In addition to or instead of being arranged on the inside of the guide rail, the strain gauge strip is also arranged on the outside of the guide rail. In particular, the strain gauge strip is arranged on the top side of the upper edge of the guide rail. In particular, the strain gauge strip is arranged on the underside of the lower edge of the guide rail.
Now, if the step, the step roller of which is guided on the lower edge of the guide rail, is lifted, the step roller is pressed against the underside of the upper edge of the guide roller. At the same time, the step roller no longer exerts a force on the lower edge of the guide rail. In the case of arranging the strain gauge strips on the upper edge of the guide rail, the step rollers of the raised step exert a pressure on the strain gauge strips. In the case of arranging the strain gauge strips on the lower edge of the guide rail, the magnitude of the force acting on the strain gauge strips is reduced as soon as the step is lifted.
The strain gauge strip is arranged on the guide rail by means of a fixing device. In particular, the strain gauge strip is bonded to the guide rail. In particular to screw the strain gauge strip to the guide rail. In particular, the fixing means comprise rivets. In particular, the strain gauge strip is welded to the guide rail.
In one embodiment, the strain gauge strip has an electrical resistance. In particular, as the strain gauge strip deforms, the resistance of the strain gauge strip changes. In particular, as the magnitude of the force acting on the strain gauge strip changes, the resistance of the strain gauge strip changes. In particular, when pressure is applied to the strain gauge strip, the resistance of the strain gauge strip changes. In particular, as the magnitude of the force acting on the strain gauge strip decreases, the resistance of the strain gauge strip changes. In particular, the change in resistance is proportional to the force acting on the strain gauge strip. In particular, the strain gauge strip is used as an electrical switch.
In one embodiment, the strain gauge strip is electrically connected to the switching device of the escalator via an electrical connection. In particular, the switching means are arranged for detecting a change in the electrical resistance of the strain gauge strip. In particular, the switching device is designed to actuate the brake of the escalator when the resistance of the strain measuring strip changes by at least a certain value. In particular, the switching device is configured to actuate the brake of the escalator when a certain limit value of the electrical resistance of the strain measuring strip is exceeded.
In particular, the escalator stops when a step, in particular a step roller of the step, applies a force to a strain gauge strip arranged on the guide rail or the magnitude of the force acting on the strain gauge strip changes due to the lifting of the step.
In particular, the strain gauge strip is deformed by the force exerted on the strain gauge strip by the steps, in particular by the step rollers. In particular, as the strain gauge strip deforms, the resistance of the strain gauge strip changes.
In particular, the brake of the escalator is activated when the electrical resistance of the strain gauge strip changes by at least a certain value, in particular when the electrical resistance is above a certain limit value. In particular, the escalator stops when the switching device actuates the brake of the escalator.
If the step is raised, the step rollers of the step are pressed against the underside of the upper edge of the guide rail.
The pressure exerted by the step rollers on the upper edge of the guide rail in this case deforms the strain gauge strips arranged on the underside and/or the top side of the upper edge of the guide rail.
Due to the lifting of the step, the magnitude of the forces acting on the lower edge of the guide rail is reduced, so that the strain gauge strips arranged on the top side and/or the bottom side of the lower edge of the guide rail are subjected to less load.
Deformation of the strain gauge strip results in a change in the resistance of the strain gauge strip. Thus, the escalator is stopped. In particular, the escalator stops when the resistance of the strain gauge strip changes by at least a certain value. In particular, the escalator stops when the electrical resistance of the strain gauge strip rises above a certain limit value.
In this way, it is achieved that an emergency stop is only executed if a dangerous situation is actually present. The determination of the respective limit value particularly avoids unnecessary emergency stops being carried out. For example, an unnecessary emergency stop may be an escalator stopping due to a small stone slipping between two escalator steps.
The escalator according to the invention has the advantage over the prior art that the safety system is easy to install. The strain gauge strip can therefore be easily fixed to the guide rail in the transition region of the escalator, in particular by gluing and/or screwing. Thus, there is no need to open the guide rail to integrate the safety system into the guide rail. Furthermore, the escalator according to the invention is ready for use again immediately after an emergency stop has been carried out, as soon as the wedged objects have been removed and the escalator steps have been brought back into their position on the guide rails. Thus, the laborious resetting of the safety system into the readiness position is dispensed with. The use of strain gauges also does not result in complex maintenance of the safety system.
Drawings
Further advantageous details, features and design details of the invention are explained in more detail in connection with the embodiments shown in the drawings. Shown here are:
fig. 1a shows an embodiment of a security system according to the prior art in a simplified schematic illustration;
fig. 1b shows a detail view of the safety system according to the prior art shown in fig. 1 a;
fig. 2 shows in a simplified schematic representation the arrangement of strain gauge strips on a guide rail in the transition region of an escalator; and
fig. 3 shows an embodiment of the security system according to the invention in a simplified schematic representation.
Detailed Description
Fig. 1a and 1b show the current state of the art. In the transition region 11 at the upper and lower end of the escalator 10, a safety system 20 is installed in each case in the guide rail 12. Fig. 1b shows a detailed view of the safety system 20 shown in fig. 1a in the escalator 10.
As shown in fig. 1b, the safety system 20 comprises a lever 21. If an object wedges between two escalator steps and thereby lifts an escalator step that has collided with the object, the lever 21 of the safety system 20 is pivoted by the lifted escalator step.
The switch is operated by pivoting of the lever 21, which places the escalator 10 in a stopped state.
The lever 21 is mechanically connected by means of a spring 22 due to the return force F of the spring 22RBut remain in place. If the return force F is greater than the spring 22 due to an object wedging between two escalator stepsRForce FOActing on the lever 21, the lever 21 is deflected.
As can be seen in fig. 1b, this structure according to the prior art is very complex. In order to integrate the safety system into the guide rail, the guide rail must have a recess.
The spring is also difficult to access, so that it is very laborious to return the safety system into the ready position after an emergency stop has been implemented.
The safety system shown in fig. 1a and 1b has the disadvantage, inter alia, that, due to the triggering mechanism by means of the lever, the safety system has only a very small triggering area. An emergency stop is only activated when the steps are lifted exactly at the location of the escalator where the safety system is located. In order to be able to initiate an emergency stop in a large area of the transition area of the escalator by means of the safety system, it is necessary in the systems known from the prior art to integrate a plurality of safety systems into the guide rail. This is however very costly.
Fig. 2 shows the arrangement of the strain gauge strip 23 of the safety system according to the invention on the guide rail 12 at the lower end of the escalator 10.
In the exemplary embodiment shown in fig. 2, the strain gauge strip 23 is arranged in a transition region 11, in which transition region 11 the steps of the escalator 10 are transferred from the transport region 14 into the circulation region 15, on which escalator at least in the transition region 11 a C-shaped guide rail 12 is provided. The strain gauge strip 23 is arranged here on the underside of the upper edge 12a of the guide rail 12.
However, likewise, the strain gauge strip 23 may also be arranged on the top side of the upper edge 12 a.
The strain gauge strip 23 is fixed to the guide rail 12 by means of a fixing device not shown here. In particular, the fixing means is an adhesive. In particular, the fixing means are bolted connections. In particular, the fixing means comprise rivets. In particular, the strain gauge strip is welded to the guide rail.
As shown in fig. 3, the step rollers 13a of the steps 13 are guided on the lower edge 12b of the guide rail 12. A strain gauge strip 23 is arranged on the underside of the upper edge 12a of the guide rail 12, which strain gauge strip 23 is electrically connected to a switching device 24 via an electrical connection 25.
In the embodiment shown in fig. 3, only one side of the guide portion of the step 13 is shown. Equivalent to the illustrated arrangement of the strain gauge strips 23 on the guide rail 12, it is also possible to additionally arrange further strain gauge strips on the guide rail of the opposite step roller 13 a' which guides the other side of the step 13. In this case, the further strain gauge strip can likewise be electrically connected to the switching device 24 via an electrical connection or to a further switching device.
If the step 13 is transferred from the transport area to the transition area 11In the circulation region, the object is wedged between the two steps 13, and the step 13 which impacts on the object is lifted, wherein the step roller 13a of this step 13 is lifted from the lower edge 12b of the guide rail 12 and is pressed against the upper edge 12a of the guide rail 12. Here, the step roller 13a is acted upon by a force FOIs pressed against the strain gauge strip 23 arranged on the upper edge 12a, whereby the strain gauge strip 23 is deformed and as a result the resistance of the strain gauge strip 23 changes.
If the force F acting on the strain gauge strip 23 isOIf the limit value is exceeded, so that the electrical resistance of the strain gauge strip 23 changes by at least a certain amount, in particular if the electrical resistance of the strain gauge strip 23 exceeds the limit value, a corresponding signal is transmitted to the switching device 24 via the electrical connection 25. Thus, the switching device 24 actuates the brake of the escalator 10 to stop the escalator 10.
Subsequently, the object wedged between the two steps may be removed and the steps may be put in place again. No readjustment is required for the security system. Immediately after the step is positioned, the safety system is put into operation again.
In a further embodiment, which is not shown, the strain gauge strip is arranged on the lower edge of the guide rail.
The step roller permanently exerts a force on the strain gauge strip arranged on the lower edge.
If at least one step is lifted from its position, the force acting on the strain gauge strip is reduced, whereby the strain gauge strip is deformed and thus the resistance of the strain gauge strip changes.
If the force acting on the strain gauge strip is below a limit value such that the resistance of the strain gauge strip changes by at least a certain amount, in particular the resistance of the strain gauge strip is above a certain limit value, the escalator stops, equivalently to the situation in the above-described embodiment.
Description of the reference numerals
10 escalator
11 transition region
12 guide rail
12a upper edge
12b lower edge
13 step
13a step roller
14 transport area
15 circulation area
20 safety system
21 lever
22 spring
23 Strain gauge strip
24 switching device
25 electric connector
FRRestoring force of spring
FOThe force applied by the escalator steps.
Claims (9)
1. An escalator (10) having:
at least one guide rail (12),
a plurality of steps (13) that can be moved along the guide rail (12),
a transition zone (11) in the lower escalator zone and the upper escalator zone, respectively, and
a safety system (20) which is configured to trigger the stopping of the escalator (10) when at least one of the steps (13) is lifted from the guide rail (12), in particular in the transition region (11),
it is characterized in that the preparation method is characterized in that,
the safety system (20) has a strain gauge strip (23) which is arranged on the guide rail (12), in particular on the guide rail (12) in the transition region (11).
2. Escalator (10) according to claim 1,
it is characterized in that the preparation method is characterized in that,
the guide rail (12) has an upper edge (12a) and a lower edge (12b), wherein the step rollers (13a) of the steps (13) are guided between the upper edge (12a) and the lower edge (12b), and the top side of the lower edge (12b) serves as the active surface of the step rollers (13a), in particular the guide rail (12) has an upper edge (12a) and a lower edge (12b) in the transition region (11),
in particular, the guide rail (12) has a C-shape, wherein
The guide rail (12) has an upper edge (12a), a lower edge (12b) and side edges, and wherein
The shape of the guide rail (12) is such that the step rollers (13a) are guided along the lower edge (12b) inside a C-shaped guide rail (12),
in particular, the guide rail (12) is C-shaped in the transition region (11).
3. Escalator (10) according to claim 2,
it is characterized in that the preparation method is characterized in that,
the strain gauge strip (23) is arranged on the inner side of the guide rail (12), in particular on the underside of the upper edge (12 a).
4. Escalator (10) according to claim 2 or 3,
it is characterized in that the preparation method is characterized in that,
the strain gauge strip (23) is arranged on the outside of the guide rail (12), in particular on the top side of the upper edge (12 a).
5. Escalator (10) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the strain gauge strip (23) has an electrical resistance which is dependent on a force (F) acting on the strain gauge strip (23)O) And (6) changing.
6. Escalator (10) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the strain gauge strip (23) is electrically connected to a switching device (24) by means of an electrical connection (25), wherein
The switching device (24) is provided for detecting a change in the electrical resistance of the strain gauge strip (23), and
in the event of a change in the electrical resistance of at least a specific value, in particular above a specific limit value, the brake of the escalator (10) is actuated.
7. Method for activating an emergency stop of an escalator (10) according to one of claims 1 to 6,
it is characterized in that the preparation method is characterized in that,
when a force (F) acts on the strain gauge strip (23)O) Is changed by the lifting of at least one step (13), the escalator (10) is stopped.
8. The method of claim 7, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
when a force (F) acts on the strain gauge strip (23)O) According to the force (F) acting on the strain gauge strip (23) when the magnitude of (A) changesO) Deforms accordingly, and the resistance of the strain gauge strip (23) changes.
9. The method of claim 8, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
when the resistance of the strain gauge strip (23) changes by at least a certain value, in particular when the resistance is above a certain limit value, a switching device (24) actuates a brake, so that the escalator (10) is stopped.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019218915.6A DE102019218915A1 (en) | 2019-12-05 | 2019-12-05 | Escalator with safety system |
| DE102019218915.6 | 2019-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112919295A true CN112919295A (en) | 2021-06-08 |
Family
ID=73452059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011414911.0A Pending CN112919295A (en) | 2019-12-05 | 2020-12-04 | Escalator with safety system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3831762A1 (en) |
| CN (1) | CN112919295A (en) |
| DE (1) | DE102019218915A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230406676A1 (en) * | 2022-05-24 | 2023-12-21 | Otis Elevator Company | Escalator device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048808A1 (en) * | 2012-09-27 | 2014-04-03 | Inventio Ag | Guide rail for a runner of an escalator or of a moving pavement |
| CN108190709A (en) * | 2016-12-08 | 2018-06-22 | 通力股份公司 | Manned means of transport |
| CN108190712A (en) * | 2016-12-08 | 2018-06-22 | 通力股份公司 | The monitoring device of manned means of transport |
| JP6462908B1 (en) * | 2018-01-10 | 2019-01-30 | 東芝エレベータ株式会社 | Escalator diagnostic device and escalator diagnostic method |
| CN110155869A (en) * | 2019-07-10 | 2019-08-23 | 重庆迈高电梯有限公司 | A kind of escalator with unloading way rub detection function |
-
2019
- 2019-12-05 DE DE102019218915.6A patent/DE102019218915A1/en not_active Ceased
-
2020
- 2020-11-16 EP EP20207779.8A patent/EP3831762A1/en not_active Withdrawn
- 2020-12-04 CN CN202011414911.0A patent/CN112919295A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048808A1 (en) * | 2012-09-27 | 2014-04-03 | Inventio Ag | Guide rail for a runner of an escalator or of a moving pavement |
| CN108190709A (en) * | 2016-12-08 | 2018-06-22 | 通力股份公司 | Manned means of transport |
| CN108190712A (en) * | 2016-12-08 | 2018-06-22 | 通力股份公司 | The monitoring device of manned means of transport |
| JP6462908B1 (en) * | 2018-01-10 | 2019-01-30 | 東芝エレベータ株式会社 | Escalator diagnostic device and escalator diagnostic method |
| CN110155869A (en) * | 2019-07-10 | 2019-08-23 | 重庆迈高电梯有限公司 | A kind of escalator with unloading way rub detection function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230406676A1 (en) * | 2022-05-24 | 2023-12-21 | Otis Elevator Company | Escalator device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3831762A1 (en) | 2021-06-09 |
| DE102019218915A1 (en) | 2021-06-10 |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210608 |
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