Elevator door lock safety anti-trapping system

Abstract

The invention discloses an elevator door lock safety anti-trapping system which comprises a conventional door lock loop connected with an elevator host controller in series and a standby door lock loop provided with a change-over switch and connected with the conventional door lock loop in parallel, and the standby door lock loop and the conventional door lock loop are connected into a door lock safety system through the change-over switch. The contact directions of the conventional door lock switch and the standby door lock switch of the same car door or landing door are perpendicular to each other in space. The contact directions of the contacts of the conventional door lock loop and the standby door lock loop are set to be perpendicular to each other, when the elevator runs and the conventional door lock loop breaks down, a standby door lock switch does not break down at the same time, and therefore the standby door lock loop is switched rapidly, the elevator runs to the flat layer position again, and passengers are rescued to leave an elevator car. And maintenance personnel do not need to wait for on-site rescue for a long time, and rapid and safe rescue is achieved.

Description

Technical Field

[0001] The invention relates to elevator safety technology, and in particular to an elevator door lock safety anti-trapping system. Background Art

[0002] The elevators are equipped with conventional door lock circuits. The hall doors and car doors are equipped with switches. The conventional door lock circuit connects the switches of the car door and the hall door in series. When the door is closed, the switch is closed and turned on. When all the hall doors and car doors of the elevator are closed, a closed conduction circuit is formed. When the circuit is turned on, the elevator runs up and down. If this circuit is not turned on, the elevator is forced to stop. During use, since each switch is often electrified and touches, discharge and sparking occur, which easily causes barriers to the switch contact parts, resulting in poor contact or even circuit separation and non-conduction. In addition, sand or other objects falling into the switch contact position can also cause poor contact, causing circuit breakage and causing the conventional door lock circuit to break. If the circuit is broken, the host controller thinks that the door closing failed and instructs the elevator host brake to lock the elevator to stop, and usually stops at a non-level position. In fact, all the hall doors and car doors are locked, resulting in people being trapped in the elevator car. This type of trapped person failure accounts for a considerable proportion of elevator trapped person failures. At present, people are often trapped in elevators and need to wait for professional elevator maintenance personnel to come to rescue. It usually takes more than ten minutes or even half an hour or more than an hour. The waiting time and the anxious waiting usually make passengers uncomfortable and scared. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an elevator door lock safety anti-trapping system which can quickly rescue personnel when a door lock circuit fails.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an elevator door lock safety and anti-trapping system, including a conventional door lock circuit connected in series with the elevator main controller, the elevator door lock safety and anti-trapping system also includes a spare door lock circuit arranged in parallel with the conventional door lock circuit, the spare door lock circuit and the conventional door lock circuit are connected to the door lock safety system through a switching switch; the conventional door lock circuit includes left door lock switches for hall doors on each floor, left door lock switches for car doors, right door lock switches for car doors, and right door lock switches for hall doors on each floor connected in series with each other; the spare door lock circuit includes spare left door lock switches for hall doors on each floor, spare left door lock switches for car doors, spare right door lock switches for car doors, and spare right door lock switches for hall doors on each floor connected in series with each other; the contact directions of the conventional door lock switch and the spare door lock switch of the same car door or hall door are perpendicular to each other in space.

[0005] As an improvement of the technical solution of the elevator door lock safety anti-trapped system of the present invention, the door lock safety system is provided with a switching device including the switching switch, and the switching device is connected to the elevator host controller for electrical signal transmission and is connected to the switching switch for electrical signal control.

[0006] As an improvement on the technical solution of the elevator door lock safety and anti-trapping system of the present invention, each door lock switch includes an A contact and a B contact installed on the door head seat, and a conductive bridge installed on the door machine and having its two ends respectively in contact with the A contact and the B contact to be electrically conductive.

[0007] As an improvement on the technical solution of the elevator door lock safety anti-trapping system of the present invention, in the same car door or hall door, the A contact and the B contact of the conventional door lock switch are arranged up and down and are in contact with the conductive bridge left and right for electrical conduction, while the A contact and the B contact of the spare door lock switch are arranged front and back and are in contact with the conductive bridge up and down for electrical conduction.

[0008] As an improvement on the technical solution of the elevator door lock safety and anti-trapping system of the present invention, one of the contacts of the left door lock switch and the right door lock switch of the same hall door in the conventional door lock circuit are electrically connected to each other, and the other contact of the left door lock switch and the right door lock switch are respectively electrically connected to one of the contacts of the other two hall doors; the circuit arrangement of the backup door lock circuit is the same as that of the conventional door lock circuit.

[0009] As an improvement on the technical solution of the elevator door lock safety and anti-trapping system of the present invention, the conventional left door lock switch and the spare left door lock switch of the same hall door are independently arranged on the door head seat and located on the side opposite to the door machine; the conventional right door lock switch and the spare right door lock switch of the same hall door are independently arranged on the door head seat and located on the side opposite to the door machine.

[0010] As an improvement to the technical solution of the elevator door lock safety anti-trapping system of the present invention, the door lock switches of the car door and the hall door are arranged in the same manner.

[0011] As an improvement on the technical solution of the elevator door lock safety anti-trapped system of the present invention, the switching switch is a relay.

[0012] The beneficial effects of the present invention are as follows: the backup door lock circuit can be a circuit structure that is substantially the same as the conventional door lock circuit and is arranged and installed in parallel. This circuit also includes a switching switch that actively controls its conduction and disconnection, so that it fully complies with various standards of existing elevators. When the conventional door lock circuit is disconnected, the system automatically directs the switching device to control the switching switch to close to connect the backup door lock circuit, or manually switches to the backup door lock circuit to restore the elevator to the leveling position until the passengers leave the elevator car. There is no need to wait for maintenance personnel to arrive at the scene for a long time for rescue, so that fast and safe rescue can be achieved. The contact directions of the contacts of the conventional door lock circuit and the backup door lock circuit are set to be perpendicular to each other. When the conventional door lock circuit fails during the operation of the elevator, the backup door lock circuit will not have similar or equivalent failures due to the different directions, so that it can play its role as a substitute and play a fast and effective rescue role. Therefore, the rule that the probability of both the conventional door lock switch and the backup door lock switch failing at the same time is almost zero is utilized. When the conventional door lock circuit fails but the hall door and car door are actually closed without any faults, the system can switch to the backup door lock circuit to continue running, temporarily run to a safe state, and carry out maintenance after evacuating the passengers, thereby greatly improving the safety and reliability of elevator operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic diagram of a first communication circuit structure of an elevator door lock safety anti-trapping system.

[0014] Figure 2 The present invention is a schematic diagram of a first communication circuit structure of an elevator door lock safety anti-trapping system.

[0015] Figure 3 This is a schematic diagram of the forward structure of the elevator door lock safety and anti-trapping system.

[0016] Figure 4 for Figure 3 The locally enlarged structural diagram corresponding to area A in the middle shows the specific matching structure of the conductive bridge and the contact.

[0017] Figure 5 This is a left-side stereoscopic structural diagram of a set of door lock switches in the elevator door lock safety and anti-trapping system.

[0018] Figure 6 for Figure 5 The diagram is a right side three-dimensional structural diagram of a door lock switch. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1~Figure 4As shown, the elevator door lock safety and anti-trapping system of the present invention includes a conventional door lock circuit 11 connected in series with the elevator host controller, and the elevator door lock safety and anti-trapping system also includes a spare door lock circuit 21 arranged in parallel with the conventional door lock circuit 11, and the spare door lock circuit 21 and the conventional door lock circuit 11 are connected to the door lock safety system through a switch 22. When the conventional door lock circuit 11 is disconnected, the system automatically directs the switching device to control the switch 28 to close so that the spare door lock circuit 21 is turned on, or manually switches to the spare door lock circuit 21, and restores the elevator to the leveling position until the passengers are rescued and leave the elevator car, without having to wait for a long time for maintenance personnel to arrive at the scene for rescue, so as to achieve rapid and safe rescue.

[0021] The conventional door lock circuit 11 includes the left door lock switch 12 of each floor hall door, the left door lock switch 13 of the car door, the right door lock switch 15 of the car door, and the right door lock switch 16 of each floor hall door, which are connected in series with each other; the standby door lock circuit 21 includes the standby left door lock switch 22 of each floor hall door, the standby left door lock switch 23 of the car door, the standby right door lock switch 25 of the car door, and the standby right door lock switch 26 of each floor hall door, which are connected in series with each other. The left door lock switch 12 of the hall door, the left door lock switch 13 of the car door, the right door lock switch 15 of the car door, the right door lock switch 16 of the hall door, the standby left door lock switch 22 of the hall door, the standby left door lock switch 23 of the car door, the standby right door lock switch 25 of the car door, and the standby right door lock switch 26 of the hall door are all door lock switches, and all have a structure of electrical conduction formed by contacting two conductive contacts through a conductive bridge. The spare door lock circuit 21 can be a circuit structure that is basically the same as the conventional door lock circuit 11 in terms of line layout and is installed independently of each other but has a different specific structure. This circuit also includes a switching switch 28 that actively controls its conduction and disconnection. The left door lock switch is symmetrical with the right door lock switch, which can fully comply with the various standards of existing elevators. There is no need to use differentiated components, which is easier to implement. The spare door lock circuit is also in the process of mechanical action during the normal operation of the elevator, but it is not conductive, so it is rubbed during the operation without sparking, making the contact position smoother and the contact position of the conductive bridge and the contact more and more fitted. The technical solution has two sets of door lock circuits. During daily operation, one set can be selected as the conventional door lock circuit and the other set as the spare door lock circuit, so that the two sets of door lock circuits can be rotated regularly so that both sets of circuits have the process of actual operation with power.

[0022] like Figure 1~Figure 5As shown, the contact directions of the conventional door lock switch and the spare door lock switch of the same car door or hall door are perpendicular to each other in space. The contact direction refers to the relative position arrangement direction between two conductive contact parts. The car door and hall door both open and close left and right, with the hall door in front and the car door in the back to form a front-to-back arrangement. If the two conductive contact parts are close to each other and contact when the hall door is closed, their contact direction is the left-right direction; if the two conductive contact parts are in friction contact with each other in an up-down offset, their contact direction is the up-down direction / vertical direction; if the two conductive contact parts are in friction contact with each other in an up-down offset, their contact direction is the front-to-back direction / longitudinal direction. The contact directions of the contacts of the conventional door lock circuit and the spare door lock circuit are set to be perpendicular to each other. When the conventional door lock circuit fails during the operation of the elevator, its spare door lock circuit will not have similar or equivalent failures due to different directions, so that it can play its role as a substitute and play a quick and effective rescue role. Therefore, the rule that the probability of both the conventional door lock switch and the backup door lock switch failing at the same time is almost zero is utilized. When the conventional door lock circuit fails but the hall door and car door are actually closed without any faults, the system can switch to the backup door lock circuit to continue running, temporarily run to a safe state, and carry out maintenance after evacuating the passengers, thereby greatly improving the safety and reliability of elevator operation.

[0023] More preferably, the door lock safety system is provided with a switching device 29 including the switching switch 28, and the switching device 29 is connected to the elevator host controller 19 for electrical signal transmission and is connected to the switching switch 28 for electrical signal control. When the elevator encounters a door lock circuit failure that causes people to be trapped in the car, the elevator host controller 15 instructs the switching device 29 to control the switching switch 28 to close, so that the spare door lock circuit 21 is temporarily turned on for rescue, and the people trapped in the elevator car are rescued. Of course, the opening and closing of this switching switch 28 can also be remotely controlled by the elevator maintenance personnel, or the switching switch 28 can be manually closed on site, and the spare door lock circuit 21 can be temporarily used to run the elevator until the rescue of the trapped people in the elevator car is completed.

[0024] More preferably, if Figure 5 , Figure 6 As shown, each door lock switch includes an A contact 32 and a B contact 33 installed on a door head seat 31, and a conductive bridge 35 installed on a door machine 36 and having two ends that are in contact with the A contact 32 and the B contact 33 and electrically conductive. When closing the door, the conductive bridge 35 is used to contact the A contact 32 and the B contact 33 and electrically conductive, forming one of the switch units of the door lock circuit. Multiple switch units are connected in series to form a door lock safety circuit. When the entire circuit is conductive, the elevator is allowed to run. Among them, the A contact includes a conventional left door lock switch A contact, a conventional right door lock switch A contact, a spare left door lock switch A contact, and a spare right door lock switch A contact; the B contact includes a conventional left door lock switch B contact, a conventional right door lock switch B contact, a spare left door lock switch B contact, and a spare right door lock switch B contact.

[0025] Furthermore, in the same car door or hall door, the A contact 32 and the B contact 33 of the conventional door lock switch are arranged up and down or front and back and are in contact with the conductive bridge 35 left and right for electrical conduction, while the A contact 32 and the B contact 33 of the standby door lock switch are arranged front and back and are in contact with the conductive bridge 35 up and down for electrical conduction. Since the contact conduction directions of the conventional door lock switch and the standby door lock switch are different, when a contact failure in a certain direction causes the signal transmission conduction to fail, the same contact failure does not exist in the other contact direction, so the signal conduction is effectively conducted by switching to another door lock circuit. The elevator can automatically or manually switch to the effectively conducted standby door lock circuit, so that other mechanical and electrical components can operate normally and the hall door and the car door are actually safely closed. The elevator can immediately switch the signal circuit, quickly resume safe operation, rescue the car occupants to the leveling position, release the occupants, and complete the rescue of the trapped people in the elevator car.

[0026] More preferably, in the conventional door lock circuit, one of the contacts 32 of the left door lock switch 12 and the right door lock switch 16 of the same hall door are electrically connected to each other, and the other contacts of the left door lock switch and the right door lock switch are respectively electrically connected to one of the contacts of the other two adjacent hall doors 38, so that the door lock switches attached to the two door leaves of a hall door form a switch unit, and then the two contact lead ends are respectively output to be connected in series with the other two switch units, and the switch units are combined together in series to form a door lock safety circuit (referred to as the door lock circuit). Of course, the two contacts of all left door lock switches 12 can also be electrically connected to one of the contacts of the two adjacent left door lock switches, so that all left door lock switches 12 are connected in series as a group, and then connected in series with a group of right door lock switches 16 and the door lock switches of the car doors 13 / 15 to form a door lock safety circuit. The backup door lock circuit 21 has the same circuit arrangement as the conventional door lock circuit 11 and can be arranged adjacent to each other, that is, a substantially identical door lock circuit is added to the original door lock circuit, and the difference lies in the specific arrangement direction and structure. That is, the left door lock switch 22 and the right door lock switch 26 of the hall door and the door lock switches 23 / 25 of the car door are connected in series to form another set of door lock safety circuits.

[0027] More preferably, the conventional left door lock switch 12 and the spare left door lock switch 22 of the same hall door are independently arranged on the side opposite to the door head seat 31 and the door machine 36. When the door is opened, the door lock switch is disconnected, the door lock safety circuit is cut off, and the elevator is locked and cannot be operated; when the door is closed, the door lock switch is closed to connect the door lock circuit, and the elevator can be lifted and lowered normally. When the conventional door lock circuit fails and disconnects, the elevator itself is safe. The spare door lock circuit 21 is connected and replaces the conventional door lock circuit to run the elevator until the elevator car moves to the leveling position and the trapped people are rescued and completely leave the car. The conventional right door lock switch 16 and the spare right door lock switch 26 of the same hall door are independently arranged on the side opposite to the door head seat 31 and the door machine 36 to complete the safety detection when the other door leaf is opened or reset and to control the safe operation of the elevator by closing the door, so as to avoid running the elevator with the door open. In order to facilitate design and installation and configuration of spare parts, the door lock switches of the car door and the hall door are arranged in the same way.

[0028] More preferably, the switching switch is a relay, which can switch the circuit conveniently and quickly.

[0029] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. An elevator door lock safety and anti-trapping system, comprising a conventional door lock circuit connected in series with an elevator host controller, characterized in that: The elevator door lock safety and anti-trapping system also includes a spare door lock circuit arranged in parallel with the conventional door lock circuit, and the spare door lock circuit and the conventional door lock circuit are connected to the door lock safety system through a switching switch; the conventional door lock circuit includes left door lock switches for hall doors on each floor, left door lock switches for car doors, right door lock switches for car doors, and right door lock switches for hall doors on each floor connected in series; the spare door lock circuit includes spare left door lock switches for hall doors on each floor, spare left door lock switches for car doors, spare right door lock switches for car doors, and spare right door lock switches for hall doors on each floor connected in series; the contact directions of the conventional door lock switch and the spare door lock switch of the same car door or hall door are perpendicular to each other in space.

2. The elevator door lock safety anti-trapped system according to claim 1, characterized in that: The door lock safety system is provided with a switching device including the switching switch, and the switching device is connected to the elevator host controller for electrical signal transmission and is connected to the switching switch for electrical signal control.

3. The elevator door lock safety anti-trapped system according to claim 1, characterized in that: Each door lock switch includes an A contact and a B contact installed on the door head seat, and a conductive bridge installed on the door machine and having two ends respectively contacting with the A contact and the B contact to be electrically connected.

4. The elevator door lock safety anti-trapped system according to claim 3 is characterized in that: In the same car door or hall door, the A contact and the B contact of the conventional door lock switch are arranged up and down and contact the conductive bridge left and right for electrical conduction, while the A contact and the B contact of the spare door lock switch are arranged front and back and contact the conductive bridge up and down for electrical conduction.

5. The elevator door lock safety anti-trapped system according to claim 4, characterized in that: In the conventional door lock circuit, one of the contacts of the left door lock switch and the right door lock switch of the same hall door are electrically connected to each other, and the other contact of the left door lock switch and the right door lock switch is respectively electrically connected to one of the contacts of the other two hall doors; the circuit arrangement of the backup door lock circuit is the same as that of the conventional door lock circuit.

6. The elevator door lock safety anti-trapped system according to claim 1 or 5, characterized in that: The conventional left door lock switch and the spare left door lock switch of the same hall door are independently arranged on the door head seat and located on the side opposite to the door machine; the conventional right door lock switch and the spare right door lock switch of the same hall door are independently arranged on the door head seat and located on the side opposite to the door machine.

7. The elevator door lock safety and anti-trapping system according to claim 6, characterized in that: The door lock switch arrangement of the car door and the hall door is the same.

8. The elevator door lock safety and anti-trapping system according to claim 1, characterized in that: The switching switch is a relay.

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