CN113955612A - Light curtain safety circuit and emergency rescue device - Google Patents
Light curtain safety circuit and emergency rescue device Download PDFInfo
- Publication number
- CN113955612A CN113955612A CN202111174115.9A CN202111174115A CN113955612A CN 113955612 A CN113955612 A CN 113955612A CN 202111174115 A CN202111174115 A CN 202111174115A CN 113955612 A CN113955612 A CN 113955612A
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- CN
- China
- Prior art keywords
- light curtain
- emergency rescue
- contact
- control contact
- rescue control
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a light curtain safety circuit, comprising: an elevator safety loop for starting or stopping the elevator; the light curtain signal contact unit comprises at least two groups of light curtain signal contacts which are connected in series, and the light curtain signal contact unit is connected in series in an elevator safety loop; the first emergency rescue control contact is a normally closed contact and is connected with the light curtain signal contact unit in series; the second emergency rescue control contact is a normally open contact and is connected with the light curtain signal contact unit in parallel; and the third emergency rescue control contact is a normally open contact, and a group of light curtain signal contacts in the light curtain signal contact unit is connected with the first emergency rescue control contact in series and then is connected with the third emergency rescue control contact in parallel.
Description
Technical Field
The invention relates to an elevator driving and controlling technology, in particular to a light curtain safety circuit. The invention also relates to an emergency rescue device.
Background
The elevator light curtain system emits infrared rays through the photoelectric safety device to generate a protective light curtain, when the light curtain is shielded, the device sends a shading signal to control mechanical equipment with potential danger to stop working, safety accidents are avoided, and the light curtain system is generally applied to elevator door zone protection. When no object is invaded in the protection area, the receiver of the light curtain sensor is in a light receiving state, the safety loop is connected, and the elevator runs normally. When an object (not less than the minimum detectable body or resolution) invades the protection area, the receiver of the light curtain sensor is in a shading state, the safety loop is cut off, and the elevator stops running. When the invaded object is withdrawn from the protection area, the receiver of the light curtain sensor becomes the light receiving state again, the safety loop is connected, and the elevator operates normally.
Some improvements related to the light curtain system are also disclosed in the prior art, for example, chinese patent CN205709361U, the safety light curtain is hidden and installed in the front wall, and the sensing through hole for the safety light curtain to work is opened on the outer side of the front wall, so that not only the beauty of the elevator is ensured, but also the accidental risk caused by passengers touching the safety light curtain can be prevented.
In addition, chinese patent CN210176249U discloses an elevator protection device, which can make up the blind area of the light curtain protection system, effectively avoid the damage caused by the direct contact between the object or passenger limb at the lower part of the entrance of the elevator without car door and the inner wall of the elevator shaft or the inner wall of the car door when the elevator car runs, and improve the safety of the object or passenger.
Meanwhile, in the chinese patent CN213141090U, a warning light curtain is added to cooperate with an audible and visual warning device, so that on one hand, a user is warned to enter a dangerous area before an emergency stop is triggered, and the user is prevented from triggering; on the other hand, the prompt function can be played to the user before the emergency stop can not be triggered, so that the user is not frightened by the excessive shock of the emergency stop of the elevator.
However, in the above-described conventional techniques, there are some methods of preventing passengers from touching by mistake and hiding the light curtain, and there are some methods of warning passengers before the elevator is suddenly stopped, but once the elevator is suddenly stopped, the passengers are still trapped in the car and cannot get in and out, and the problem of safe getting in and out of the passengers is not actually solved. This is because the prior art light curtain circuit implementations are all independent light curtain cutoff circuits. When the light curtain signal contact is connected into the safety circuit in series and the contact is damaged, the safety circuit is cut off, the elevator stops running, and passengers can not enter or exit.
Disclosure of Invention
The invention aims to solve the technical problem of how to ensure that passengers can safely enter and exit in time after an elevator is suddenly stopped.
In order to solve the above technical problem, the present invention discloses a light curtain safety circuit, comprising:
an elevator safety loop for starting or stopping the elevator;
the light curtain signal contact unit comprises at least two groups of light curtain signal contacts which are connected in series, and the light curtain signal contact unit is connected in series in an elevator safety loop;
the first emergency rescue control contact is a normally closed contact and is connected with the light curtain signal contact unit in series;
the second emergency rescue control contact is a normally open contact and is connected with the light curtain signal contact unit in parallel;
and the third emergency rescue control contact is a normally open contact, and a group of light curtain signal contacts in the light curtain signal contact unit is connected with the first emergency rescue control contact in series and then is connected with the third emergency rescue control contact in parallel.
Preferably, the first emergency rescue control contact, the second emergency rescue control contact and the third emergency rescue control contact are manually controlled contacts.
Preferably, the first emergency rescue control contact, the second emergency rescue control contact and the third emergency rescue control contact are all contacts controlled by a safety relay or a contactor.
The invention also discloses an emergency rescue device of the light curtain safety circuit, which comprises:
the at least two groups of light curtain assemblies are used for judging whether foreign matters are shielded at the inlet and the outlet of the elevator;
be provided with in the light curtain subassembly the light curtain signal contact, each group light curtain subassembly corresponds a light curtain signal contact, and when a set of light curtain was sheltered from or when damaging, corresponding light curtain contact disconnection.
Preferably, the emergency rescue button is pressed to close the second emergency rescue control contact and the third emergency rescue control contact, and the first emergency rescue control contact is opened.
Preferably, the time for pressing the emergency rescue button is 3 seconds.
Preferably, when the elevator is in emergency leveling, if only one group of light curtain is damaged, when the other group of light curtain is shielded, the light curtain contact can still be disconnected, and the safety loop is cut off.
Preferably, the audible and visual signal alerts passengers to move away from the door protection zone during an emergency landing of the elevator.
Drawings
FIG. 1 is a schematic circuit diagram of a control contact with a mechanical structure according to an embodiment.
Fig. 2-3 are schematic diagrams of the current profile in different situations according to one embodiment.
Fig. 4 is a schematic circuit diagram of a control contact of the safety relay or contactor according to the second embodiment.
Description of the reference numerals
Light curtain signal contact GM 1; light curtain signal contact GM 2; emergency rescue control contact JJ 1; emergency rescue control contact JJ 2; emergency rescue control contact JJ 3; an emergency rescue control relay JJ; emergency rescue button JJA; a power supply BAT;
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the light curtain safety circuit of the present invention includes two groups of light curtains and signal contacts thereof, which are a first light curtain signal contact GM1 and a second light curtain signal contact GM2, respectively, and three groups of emergency rescue control contacts, which are a first emergency rescue control contact JJ1, a second emergency rescue control contact JJ2, and a third emergency rescue control contact JJ3, respectively.
The first light curtain signal contact GM1 and the second light curtain signal contact GM2 are connected in series in the safety loop, and any contact is disconnected, so that the power supply of the host can be cut off.
In the three groups of emergency rescue control contacts, a first emergency rescue control contact JJ1 is a normally closed contact, and a second emergency rescue control contact JJ2 and a third emergency rescue control contact JJ3 are normally open contacts.
The first emergency rescue control contact JJ1 is connected in series with the first light curtain signal contact GM1 and the first light curtain signal contact GM 2;
the first light curtain signal contact GM1 and the first light curtain signal contact GM2 are connected in series and then are connected in parallel with the second emergency rescue control contact JJ 2;
after the second light curtain signal contact GM2 and the first emergency rescue control contact JJ1 are connected in series, the second light curtain signal contact is connected in parallel with the third emergency rescue control contact JJ 3.
The light curtain safety circuit is mainly applied to a home elevator, and the operation state of the circuit is explained below.
Under a normal state, two groups of light curtain signal contacts are connected in series into a safety loop, and three groups of emergency rescue control contacts have no influence on the on-off of the light curtain safety loop through the combination of normally closed and normally open;
when a group of light curtain signal contacts are damaged, only one group of light curtain signal contacts work normally, the safety loop is cut off, and the elevator stops running, wherein the specific implementation example is described as follows:
example one
When the safety switch is used for controlling, and the emergency rescue control contacts are switched, the emergency rescue control contacts JJ1, JJ2 and JJ3 act when the 'emergency rescue' button is pressed through the mechanical structure of the safety switch.
As shown in fig. 2, when GM1 is open, GM2 remains closed, by continuously pressing the "emergency" button, JJ2 is closed, JJ3 is closed, and JJ1 is open by a mechanical structure. In the circuit, JJ2, GM2 and JJ3 are connected in series, and the safety loop is connected.
As shown in fig. 3, when GM2 is open, GM1 is still closed, by continuously pressing the "emergency" button, by mechanical structure JJ2, JJ3 is closed, and JJ1 is open. The GM1 and the JJ3 are connected in series in the circuit, and the safety loop is connected.
Because a group of light curtain signal contacts are not damaged, the safety loop is switched on again, and the elevator runs again and is leveled.
Example two
As shown in fig. 4, when the emergency rescue control contact of the safety relay or the contactor is adopted, the circuit formed by the multi-contact safety relay and the emergency rescue button is pressed, JJA is pressed, the relay circuit is switched on, the JJ multi-contact relay is electrified and triggered, the first emergency rescue control contact JJ1 is a normally closed contact, and the second emergency rescue control contact JJ2 and the third emergency rescue control contact JJ3 are normally open contacts. The multi-contact relay comprises three contacts of JJ1, JJ2 and JJ3, and emergency rescue control contacts JJ1, JJ2 and JJ3 which are controlled to act.
The specific operation manner is the same as that of the first embodiment, and is not described herein again.
Because a group of light curtain signal contacts are not damaged, the safety loop is switched on again, and the elevator runs again and is leveled.
EXAMPLE III
When one group of light curtain signal contacts are damaged, only one group of light curtain signal contacts work normally, the safety loop is cut off, and the elevator stops running.
At the moment, if passengers are trapped in the elevator car, self rescue can be implemented by continuously pressing the 'emergency rescue' button. In the invention, two buttons with visible marks, such as a warning mark button with a yellow bottom and a black character, are arranged in a car, passengers can press the two buttons for more than 3 seconds at the same time to enable three groups of 'emergency rescue' button contacts to act completely, and because one group of light curtain signal contacts are not damaged, a safety loop is switched on again, and an elevator runs again and is leveled. In the invention, the leveling speed is not more than 0.15m/s, the leveling speed can be properly increased or decreased, but the comfort of passengers is ensured as much as possible, and after the elevator car levels, the elevator stops running and waits for maintenance personnel to go to the door for maintenance.
Example four
When a group of light curtain signal contacts are damaged, if the car detects that passengers are trapped in the car, the passengers in the car can be informed of 'emergency rescue' in a voice or image mode. In the invention, the voice prompt information may be: and (3) please continuously press the emergency rescue buttons with the two red marks for more than 3S, waiting for the flat floor of the lift car, and quickly withdrawing the lift car after the lift car door is opened. The image prompt information can show the rescue mode to the passenger more clearly through the animation.
If only there is a set of light curtain signal contact to damage, the passenger breaks away from the car back according to pronunciation or image suggestion, and the elevator stops to move at once and waits for the maintenance, if two sets of light curtain signal contacts all damage, the passenger does not have the reaction after continuously pressing, and control system detects the mode that safety circuit still is not put through and can further pass through pronunciation or image, and the interior passenger of notice car is a little calm and not happy, waits for follow-up rescue, mild passenger psychological condition.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A light curtain safety circuit, comprising:
an elevator safety loop for starting or stopping the elevator;
the light curtain signal contact unit comprises at least two groups of light curtain signal contacts which are connected in series, and the light curtain signal contact unit is connected in series in an elevator safety loop;
the first emergency rescue control contact is a normally closed contact and is connected with the light curtain signal contact unit in series;
the second emergency rescue control contact is a normally open contact and is connected with the light curtain signal contact unit in parallel;
and the third emergency rescue control contact is a normally open contact, and a group of light curtain signal contacts in the light curtain signal contact unit is connected with the first emergency rescue control contact in series and then is connected with the third emergency rescue control contact in parallel.
2. The light curtain safety circuit of claim 1,
the first emergency rescue control contact, the second emergency rescue control contact and the third emergency rescue control contact are manually controlled contacts.
3. The light curtain safety circuit of claim 1,
the first emergency rescue control contact, the second emergency rescue control contact and the third emergency rescue control contact are all contacts controlled by a safety relay or a contactor.
4. An emergency rescue apparatus using the light curtain safety circuit as claimed in one of claims 1 to 3, characterized by comprising:
the at least two groups of light curtain assemblies are used for judging whether foreign matters are shielded at the inlet and the outlet of the elevator;
be provided with in the light curtain subassembly the light curtain signal contact, each group light curtain subassembly corresponds a light curtain signal contact, and when a set of light curtain was sheltered from or when damaging, corresponding light curtain contact disconnection.
5. An emergency rescue apparatus as claimed in claim 4, further comprising:
and when the emergency rescue button is pressed, the second emergency rescue control contact and the third emergency rescue control contact are closed, and the first emergency rescue control contact is disconnected.
6. Emergency rescue apparatus according to claim 5,
the time for pressing the emergency rescue button is 3 seconds.
7. Emergency rescue apparatus according to claim 4,
when the elevator operates again and is leveled, if only one group of light curtain is damaged, when the other group of light curtain is shielded, the light curtain contact can still be disconnected, and the safety loop is cut off.
8. Emergency rescue apparatus according to claim 4,
when the elevator is re-run and leveled, sound and image signals alert passengers to move away from the door protection area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111174115.9A CN113955612B (en) | 2021-10-09 | 2021-10-09 | Light curtain safety circuit and emergency rescue device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111174115.9A CN113955612B (en) | 2021-10-09 | 2021-10-09 | Light curtain safety circuit and emergency rescue device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113955612A true CN113955612A (en) | 2022-01-21 |
| CN113955612B CN113955612B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111174115.9A Active CN113955612B (en) | 2021-10-09 | 2021-10-09 | Light curtain safety circuit and emergency rescue device |
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Citations (11)
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|---|---|---|---|---|
| JPH04345490A (en) * | 1991-05-24 | 1992-12-01 | Mitsubishi Electric Corp | Emergency operation device of elevator |
| KR100975758B1 (en) * | 2009-09-28 | 2010-08-12 | 전병국 | Rescue circuit of elevator |
| JP2011020786A (en) * | 2009-07-15 | 2011-02-03 | Mitsubishi Electric Building Techno Service Co Ltd | Rescue operation device of elevator |
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| CN107176532A (en) * | 2016-03-11 | 2017-09-19 | 上海三菱电梯有限公司 | The means of communication and elevator car door system control method of elevator car door system controller and intelligent door light curtain |
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| CN108249248A (en) * | 2018-01-15 | 2018-07-06 | 上海亨克电梯有限公司 | A kind of lift rescue device |
| CN208279135U (en) * | 2018-01-30 | 2018-12-25 | 快客电梯有限公司 | Autonomous elevator device of getting rid of poverty |
| CN112061913A (en) * | 2019-06-10 | 2020-12-11 | 上海三菱电梯有限公司 | Protection device for preventing car from accidentally moving |
| CN212893331U (en) * | 2020-06-20 | 2021-04-06 | 广东卓梅尼技术股份有限公司 | Elevator circuit for realizing self rescue of passenger trapped in elevator |
-
2021
- 2021-10-09 CN CN202111174115.9A patent/CN113955612B/en active Active
Patent Citations (11)
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| JPH04345490A (en) * | 1991-05-24 | 1992-12-01 | Mitsubishi Electric Corp | Emergency operation device of elevator |
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| CN113955612B (en) | 2023-06-02 |
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