Anti-pinch protection device for glass door of elevator

Abstract

An elevator glass door anti-pinch protection device comprises an elevator car and a lower sill located at the bottom of the elevator car, a door motor device is installed in the lower sill and used for controlling the elevator car, and an elevator door of the elevator car is a double-open type elevator door; an upper guide device is mounted at the top of the elevator car, and a detection unit and a control unit are mounted in the upper guide device; the detection unit is used for detecting whether an obstacle exists at the elevator door or not, and the control unit is used for processing data collected by the detection unit and controlling opening and closing of the double-open type elevator door according to the data. Compared with a structure installed on a movable door plate, the movable door plate is installed on the upper portion of the entrance, so that the movable door plate is not prone to being touched by objects to be damaged, the working face of the movable door plate is downward, stains and dust are not prone to being accumulated, and the stains and the dust can cause misoperation to affect elevator door closing, so that an elevator cannot be normally used. The damaged detection unit can be replaced independently, and a screw mounting mode is adopted, so that the subsequent use and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of elevator control devices, in particular to an anti-pinch protection device for elevator glass doors. Background Art

[0002] When the elevator door is closing, if there are passengers or objects in the middle of the door, in order to prevent the passengers or objects from being squeezed, the elevator door is equipped with a door closing anti-pinch device. The anti-pinch devices used in existing elevator door machines are mainly divided into the following types:

[0003] The mechanical safety touch plate is usually fixed on the edge of the movable door panel. When the safety touch plate is touched by passengers entering or leaving (or other door closing obstacles) when the door is closing, the safety switch on it is triggered to output a signal to the elevator control system, and the control system will re-control the door to open, thereby achieving anti-pinch protection.

[0004] The infrared protection light curtain device consists of a transmitter and a receiver, and its detection area is the plane area where the transmitter and the receiver are located. The light curtain detection device is usually installed on the door panel of the elevator. The door moves with the movement of the door panel. The power required for its operation and the obstacle signal detected are transmitted through a dedicated cable. The advantage is that obstacles in the door closing process can be detected without contact. The disadvantage is that the cable of the light curtain is subjected to millions of bends during the elevator door opening and closing process, and high requirements are placed on the life of the cable. At the same time, during the up and down operation of the elevator, the shaking of the cable may scratch other parts of the well, causing damage to the cable, and even causing an emergency stop of the elevator during high-speed operation, causing panic or even physical harm to the elevator passengers. When the door machine is used in a sightseeing elevator, the door panel is full glass. If it is fixed on the door panel or on both sides of the door machine, it will affect the beauty of the entire elevator.

[0005] The above two commonly used methods need to be fixed on the door panel, which is easy to collide and cause mechanical damage when entering and exiting the door. In view of the above problems, an elevator glass door anti-pinch protection device is proposed. Summary of the invention

[0006] The object of the present invention is to overcome the above-mentioned existing deficiencies and provide an elevator glass door anti-pinch protection device.

[0007] To achieve the above object, the present invention provides the following technical solutions: an elevator glass door anti-pinch protection device, comprising an elevator car and a lower sill located at the bottom of the elevator car, a door machine device is installed in the lower sill, the door machine device is used to control the elevator car, and the elevator door of the elevator car is a double-opening elevator door;

[0008] An upper guide device is installed on the top of the elevator car, and a detection unit and a control unit are installed in the upper guide device;

[0009] The detection unit is used to detect whether there is an obstacle at the elevator door, and the control unit is used to process the data collected by the detection unit and use the data to control the opening and closing of the double-opening elevator door.

[0010] Preferably, the detection unit is twenty ranging units, and the twenty ranging units are evenly divided into two groups, and the two groups of ranging units are evenly distributed above the left and right elevator doors respectively;

[0011] The control unit is a controller, and the controller is provided with a controller signal interface, a controller power supply and a connecting cable;

[0012] The controller signal output interface includes an input interface and a host computer interface.

[0013] Preferably, the distance measuring unit and the controller are electrically connected in parallel.

[0014] Preferably, the distance measuring unit is installed in the upper guide device through a bolt body.

[0015] Preferably, a circular groove is formed on the side wall of the bolt body, a bolt rod is installed inside the circular groove, a fixing ring is installed on the outer upper end of the bolt rod, and an annular pressure plate, a spring and an annular rubber sheet are mounted on the circumferential surface of the bolt rod.

[0016] Preferably, an extrusion block is installed at the upper edge of the annular rubber sheet, and an outer wall of the bolt body is provided with an external thread.

[0017] Preferably, the detection unit is a camera, the control unit is a control box, and the camera is electrically connected to electronic devices in the control box.

[0018] Preferably, the control box comprises a box body, an ARM embedded host and an MCU single chip microcomputer, and the ARM embedded host and the MCU single chip microcomputer are both installed in the box body;

[0019] The camera is electrically connected to the ARM embedded host, and the ARM embedded host is electrically connected to the MCU single chip computer.

[0020] Preferably, the ARM embedded host includes an AI image analysis algorithm.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Since the transmission cable does not need to move with the door panel, the drag chain previously used for the cable can be eliminated. While reducing the number of parts, it also reduces the problems of cable breakage, drag chain scratching and noise.

[0023] 2. Since it is installed on the upper part of the entrance, it is less likely to be damaged by objects than on the moving door panel. It has a structure with the working surface facing downward, and is less likely to accumulate stains and dust, which can cause malfunctions and affect the closing of the elevator door, resulting in the elevator being unable to be used normally.

[0024] 4. The detection unit is a single individual, and the packaging volume is much smaller than the usual light curtain and mechanical safety touch panel, making installation and maintenance more convenient and also conducive to logistics and transportation;

[0025] 5. If the detection unit is damaged, it can be replaced separately and installed with screws to reduce the subsequent maintenance costs;

[0026] 6. The laser ranging units are independent entities connected by connecting lines and can be freely arranged, such as straight lines, arcs, curves, etc., to detect different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 This is a wiring diagram of the right ranging unit in the present invention;

[0029] Figure 3 This is a wiring diagram of the left ranging unit in the present invention;

[0030] Figure 4 It is a structural schematic diagram of the input interface in the present invention;

[0031] Figure 5 It is a structural schematic diagram of the upper computer interface in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the bolt body in the present invention;

[0033] Figure 7 It is a structural schematic diagram of the control box in the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-7 , which are two technical solutions provided by the present invention:

[0036] The first technical solution: an elevator glass door anti-pinch protection device, comprising an elevator car and a lower sill 1 located at the bottom of the elevator car, wherein a door machine device 11 is installed in the lower sill 1, and the door machine device 11 is used to control the elevator car, and the elevator door of the elevator car is a double-opening elevator door;

[0037] An upper guide device 2 is installed on the top of the elevator car, and a detection unit and a control unit are installed in the upper guide device 2;

[0038] The detection unit is used to detect whether there is an obstacle at the elevator door, and the control unit is used to process the data collected by the detection unit and use the data to control the opening and closing of the double-opening elevator door.

[0039] Specifically, the detection unit is twenty ranging units 21, and the twenty ranging units 21 are evenly divided into two groups, and the two groups of ranging units 21 are evenly distributed above the left and right elevator doors respectively;

[0040] The control unit is a controller 22, and the controller 22 is provided with a controller signal interface, a controller power supply and a connection cable;

[0041] The controller signal output interface includes an input interface and a host computer interface.

[0042] Specifically, the distance measuring unit 21 and the controller 22 are electrically connected in parallel.

[0043] Specifically, the distance measuring unit 21 is installed in the upper guide device 2 through the bolt body 4.

[0044] Specifically, a circular groove 41 is formed on the side wall of the bolt body 4, a bolt rod 43 is installed inside the circular groove 43, a fixing ring 46 is installed on the outer upper end of the bolt rod 43, and an annular pressure plate 45, a spring 47 and an annular rubber sheet 42 are mounted on the circumferential surface of the bolt rod 43.

[0045] The screw rod 43 is fixed in the screw groove, and the carrier 3 can rotate outside the screw rod 43 and be fixed when the bolt body is screwed into the screw hole 5.

[0046] Specifically, an extrusion block 44 is installed at the upper edge of the annular rubber sheet 42 , and an external thread 48 is provided on the outer wall of the bolt body 4 .

[0047] The annular pressing sheet 45 is pressed downward by the spring 47 , and the extrusion block 44 is pressed downward by the annular pressing sheet 45 , so that the extrusion block 44 further presses the edge of the annular rubber sheet 42 , thereby improving the sealing effect.

[0048] The present invention adopts an integrated laser distance measuring sensor, which is installed on the upper part of the door entrance. The principle of laser distance measurement is used to transmit an invisible laser beam that is safe for the human body through the transmitting sensor. This laser beam will irradiate the bottom of the door entrance (usually the sill surface) in the form of a light beam, and a part of the light beam will be reflected back. The upper sensor will receive the signal emitted back. The sensor will calculate the distance between the measured object and the sensor based on the recorded time and the relationship between the light beam and time. Since the height of the door entrance is a fixed value, when there is an obstacle in the obstacle entering the door area, the distance detected by the distance measuring sensor will be less than the height of the entrance. At this time, it can be judged that there is an obstacle in the door area. The corresponding controller will send a feedback signal to the elevator control system, and the elevator control system will control the door to be reopened.

[0049] At the same time, since the laser beam is emitted to the emission surface, there will be a certain area, and obstacles in this area will be detected. It is a 3D area.

[0050] The integrated sensor is installed above the door entrance and can be applied to various door panels and structures, horizontal opening doors, curved opening doors, and outward opening doors.

[0051] According to the entrance width of different doors, multiple sensors will be used to measure together, and the signals of these sensors will be processed by a dedicated controller. The main functions of the controller are: 1. Provide power to each sensor 2. Receive the signal of each sensor and judge it according to the predetermined logic. If the set conditions are met, output feedback signal to the elevator control system. 3. Determine whether the controller and (or) sensor are faulty. If faulty, output signal to the elevator control system.

[0052] The specific line of sight method is: the door starts to close, all switches start to work, and during the closing process, the controller compares the number of feedbacks from the distance measuring units 21 on both sides. For example, the distance measuring unit 21 is a photoelectric switch. If the number of feedbacks from the photoelectric switches received on both sides is the same, it is considered that no obstacle is detected during the closing process. During the closing process, the controller compares the number of photoelectric switch actions on both sides. If there is an obstacle on one side, the number of photoelectric switch actions on both sides will be different, which is considered to be an obstacle detected during the closing process, and the controller outputs a relay signal. During the closing process, the controller compares the number of photoelectric switch actions on both sides. If the number of photoelectric switches acting on both sides is the same, but there are non-adjacent switch actions on either side, it is considered to be an obstacle detected during the closing process, and the controller outputs a relay signal. The door is completely closed and all switches are actuated. It is also considered that no obstacle is detected.

[0053] The second technical solution: The core difference compared with the first technical solution is that the detection unit and the control unit adopt a camera and a video processing system respectively.

[0054] Specifically, the detection unit is a camera, the control unit is a control box 3 , and the camera is electrically connected to electronic devices in the control box 3 .

[0055] Specifically, the control box 3 includes a box body, an ARM embedded host 31 and an MCU single chip 32, and the ARM embedded host 31 and the MCU single chip 32 are both installed in the box body;

[0056] The camera is electrically connected to the ARM embedded host 31 , and the ARM embedded host 31 is electrically connected to the MCU single chip computer 32 .

[0057] Specifically, the ARM embedded host 31 includes an AI image analysis algorithm.

[0058] The AI ​​image analysis algorithm is an existing technology and is a relatively mature image analysis algorithm, so the ARM embedded host 32 can analyze the images taken by the monitoring camera 2 through the AI ​​image analysis algorithm.

[0059] When in use, the surveillance camera 2 transmits the captured image to the ARM embedded host 32 in the control box 3, and analyzes the image through the AI ​​image analysis algorithm inside the ARM embedded host 32 to determine whether there is an obstacle under the elevator door, thereby realizing automatic opening and closing of the elevator door.

[0060] The ARM embedded host 32 and MCU single-chip computer 33 proposed in this article are the ARM embedded host and MCU single-chip computer used in an intelligent blind spot warning device based on image recognition technology with publication number CN214523570U. Since both are existing technologies, their working principles will not be described in detail.

[0061] 1. Since the transmission cable does not need to move with the door panel, the drag chain previously used for the cable can be eliminated. While reducing the number of parts, it also reduces the problems of cable breakage, drag chain scratching and noise.

[0062] 2. Since it is installed on the upper part of the entrance, it is less likely to be damaged by objects than on the moving door panel. It has a structure with the working surface facing downward, and is less likely to accumulate stains and dust, which can cause malfunctions and affect the closing of the elevator door, resulting in the elevator being unable to be used normally.

[0063] 4. The detection unit is a single individual, and the packaging volume is much smaller than the usual light curtain and mechanical safety touch panel, making installation and maintenance more convenient and also conducive to logistics and transportation;

[0064] 5. If the detection unit is damaged, it can be replaced separately and installed with screws to reduce the subsequent maintenance costs;

[0065] 6. The laser ranging units are independent entities connected by connecting lines and can be freely arranged, such as straight lines, arcs, curves, etc., to detect different areas.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator glass door anti-pinch protection device, comprising an elevator car and a sill (1) located at the bottom of the elevator car, wherein a door machine device (11) is installed in the sill (1), and the door machine device (11) is used to control the elevator car, characterized in that: The elevator car has a double-opening door. An upper guide device (2) is installed on the top of the elevator car, and a detection unit and a control unit are installed in the upper guide device (2); The detection unit is used to detect whether there is an obstacle at the elevator door, and the control unit is used to process the data collected by the detection unit and use the data to control the opening and closing of the double-opening elevator door.

2. The elevator glass door anti-pinch protection device according to claim 1, characterized in that: The detection unit comprises twenty distance measuring units (21), and the twenty distance measuring units (21) are evenly divided into two groups, and the two groups of distance measuring units (21) are evenly distributed above the left and right elevator doors respectively; The control unit is a controller (22), and the controller (22) is provided with a controller signal interface, a controller power supply and a connection cable; The controller signal output interface includes an input interface and a host computer interface.

3. The elevator glass door anti-pinch protection device according to claim 2, characterized in that: The distance measuring unit (21) and the controller (22) are electrically connected in parallel.

4. The elevator glass door anti-pinch protection device according to claim 3, characterized in that: The distance measuring unit (21) is installed in the upper guide device (2) via a bolt body (4).

5. The elevator glass door anti-pinch protection device according to claim 4, characterized in that: The side wall of the bolt body (4) is provided with a circular groove (41), a bolt rod (43) is installed inside the circular groove (43), a fixing ring (46) is installed on the outer upper end of the bolt rod (43), and the circumferential surface of the bolt rod (43) is covered with an annular pressure plate (45), a spring (47) and an annular rubber sheet (42).

6. The elevator glass door anti-pinch protection device according to claim 5, characterized in that: An extrusion block (44) is installed at the upper end edge of the annular rubber sheet (42), and an outer wall of the bolt body (4) is provided with an external thread (48).

7. The elevator glass door anti-pinch protection device according to claim 1, characterized in that: The detection unit is a camera, the control unit is a control box (3), and the camera is electrically connected to the electronic components in the control box (3).

8. The elevator glass door anti-pinch protection device according to claim 7, characterized in that: The control box (3) comprises a box body, an ARM embedded host (31) and an MCU single chip computer (32), wherein the ARM embedded host (31) and the MCU single chip computer (32) are both installed in the box body; The camera is electrically connected to an ARM embedded host (31), and the ARM embedded host (31) is electrically connected to an MCU single chip computer (32).

9. The elevator glass door anti-pinch protection device according to claim 8, characterized in that: The ARM embedded host (31) includes an AI image analysis algorithm.

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