Elevator door foreign matter clamping safety device

Abstract

The utility model discloses an elevator door foreign matter clamping safety device, which relates to the field of elevator safety and comprises a lintel device, a sill device and a movable sensing mechanism. The sill device is arranged at the bottom of the elevator door, and mounting notches are formed in the sill device and the lintel device; the movable sensing mechanism is arranged in mounting notches of the sill device and the lintel device and comprises a sensing frame, a rotating plate or a telescopic plate, a connecting shaft and a sensing switch; the induction frame is connected to the installation notch, corresponding connecting holes are formed in the rotating plate or the telescopic plate and the induction frame, the rotating plate or the telescopic plate penetrates through the connecting holes through connecting shafts to be rotatably connected to the top of the induction frame, and the induction switch is arranged on the portion, below the rotating plate, of the induction frame. And when foreign matters exist at the bottom or the top of the door and the lift car is pulled upwards or downwards, the rotating plate or the telescopic plate deflects to trigger the inductive switch to output a signal, the safety circuit is triggered, and the elevator stops running.

Description

Technical Field

[0001] The utility model relates to the field of elevator safety, in particular to a foreign body clamping safety device for elevator doors. Background Art

[0002] Existing elevator safety devices include mechanical and electrical protection devices, which fall into the following categories: 1. Overspeed governor safety clamp. When the elevator stalls, the overspeed governor ratchet brakes, and the overspeed governor wire rope pulls up the safety clamp, locking the guide rails and braking the elevator. 2. Buffer. This buffer acts as a buffer when the elevator or counterweight falls. Electrical protection devices include UCMP, light curtain, door lock circuit, safety circuit, speed feedback, timeout protection, overload protection, relay operation feedback, phase loss and phase sequence protection, overcurrent and short-circuit protection, etc. The light curtain works as follows: One side of the light curtain is equipped with multiple infrared transmitters at equal intervals, and the other side has the same number of infrared receivers arranged in the same direction. Each infrared transmitter corresponds to a corresponding infrared receiver, and the two are installed in a straight line. When there are no obstacles between the infrared transmitters and the infrared receivers in the same straight line, the modulated signal (light signal) emitted by the infrared transmitters can reach the infrared receivers smoothly. By analyzing the internal circuit status, the presence of an object can be detected. If there is a foreign object in the middle of the car door, the car door cannot close. However, current safety devices have the following deficiencies:

[0003] Existing light curtains use multiple infrared emitting tubes (24 or 36 channels) for transmission, but they cannot completely cover the car doors. When small objects (such as ropes or slender foreign objects) are blocked between the car doors, the infrared rays cannot sense them. In this case, the car doors and floors can close normally, the safety circuit displays normal, and the elevator can run up and down normally, preventing foreign objects from getting stuck.

[0004] In existing elevator car door structures, the lower end of the light curtain is flush with the door, which is restrained by a slider within the floor sill groove, leaving a gap between the lower end of the door and the floor sill. This creates a safety blind spot in this area. If a foreign object, such as a rope or rod, is caught between the floor and the door, the light curtain cannot detect it. In this case, the safety circuit is functioning normally, and the elevator operates normally, causing the foreign object to become trapped. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an elevator door foreign body clamping safety device in view of the above-mentioned deficiencies in the prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A safety device for foreign objects entrapped in elevator doors includes a sill device and a movable sensing mechanism; the sill device is arranged at the bottom of the elevator door, and a mounting slot is provided on the sill device; the movable sensing mechanism includes a sensing frame, a rotating plate or a telescopic plate, a connecting shaft, and a sensing switch; the sensing frame is connected to the mounting slot, and corresponding connecting holes are provided on the rotating plate or the telescopic plate and the sensing frame, and the rotating plate or the telescopic plate is rotatably connected to the top of the sensing frame via a connecting shaft passing through the connecting hole, and the sensing switch is provided on the sensing frame below the rotating plate or the telescopic plate. The utility model designs a safety device for foreign objects entrapped in elevator doors, including a sill device and a movable sensing mechanism. When a foreign object is caught in the door gap or the gap at the bottom of the door, and the car is pulled upward, the deflection of the rotating plate or the telescopic plate triggers the sensing switch to output a signal, thereby triggering the safety circuit and stopping the elevator. Manual reset or manual operation by rescue personnel is required to restart the elevator.

[0008] As a further preferred embodiment of the present invention, a reset device is further included, wherein the reset device is connected to the rotating plate or the telescopic plate, and the reset device facilitates the reset of the rotating plate or the telescopic plate.

[0009] As a further preference of the present invention, the reset device is a reset spring, one end of the reset spring is connected to the bottom of the rotating plate or the telescopic plate, and the other end is connected to the sensing frame.

[0010] As a further preferred embodiment of the present invention, it further includes a car, a car door and a lintel device; a slider is provided at the bottom of the car door, and a slide groove is provided at the bottom of the sill device, the slider is movably arranged in the slide groove, the car is arranged on the inner side of the car door, and the lintel device is arranged above the car.

[0011] As a further preferred embodiment of the present invention, a mounting slot is provided on the lintel device, and a motion sensing mechanism is provided on the upper side of the lintel device above the car. When the elevator door is opened normally, the rope, etc. is not sensed by the light curtain or safety touch panel, or when the elevator is below the landing door, the car door and the floor door are closed normally, and the elevator is descending, when the rope or rod-shaped object is stressed at both ends or the car is misaligned with the landing door frame, the turning plate or telescopic plate deflects or contracts under the stress, triggering the induction switch, triggering the safety circuit, and stopping the elevator. Restarting the elevator requires manual reset or manual operation by rescue personnel.

[0012] As a further preference of the present invention, it also includes a light curtain, which is arranged on the corresponding two sides of the car door. The light curtain includes a plurality of corresponding infrared emitting tubes and infrared receiving tubes; the infrared emitting tubes and infrared receiving tubes are respectively arranged on the corresponding two sides of the two car doors.

[0013] As a further preferred embodiment of the present invention, the induction switch is an action switch or a photoelectric induction switch.

[0014] The utility model has the following beneficial effects:

[0015] 1. This utility model designs an elevator door foreign object entrapment safety device, including a sill device and a movable sensing mechanism. When a foreign object is trapped in the door gap or the gap at the bottom of the door, and the elevator car is pulled upward, the deflection of the rotating plate or telescopic plate triggers the output signal of the sensing switch, triggering the safety circuit, stopping the elevator. Restarting the elevator requires manual reset or manual operation by rescue personnel, thus compensating for the shortcomings of safety devices and reducing safety blind spots. It prevents accidents caused by elevator door entrapment during daily use.

[0016] 2. The lintel device is equipped with a motion sensing mechanism. When the elevator door is open normally, the rope is not sensed by the light curtain or safety touch panel, or the elevator is below the landing door, the car door and the landing door are closed normally, and the elevator is descending, if the rope or rod-like object is stressed at both ends or the car is misaligned with the landing door frame, the turning plate or telescopic plate will deflect or retract under the force, triggering the sensor switch, triggering the safety circuit, and stopping the elevator. Restarting the elevator requires manual reset or manual operation by rescue personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the door lintel device of the present utility model;

[0019] Figure 3 It is a structural schematic diagram of the sill device of the utility model;

[0020] Figure 4 This is a structural diagram of the active sensing mechanism of the utility model in a normal state;

[0021] Figure 5 It is a structural diagram of the activity sensing mechanism in the triggered state;

[0022] Figure 6 This is a schematic diagram of the structure of the elevator when it is going up;

[0023] Figure 7 This is a schematic diagram of the structure of the elevator when it is going down;

[0024] Figure 8 It is an exploded view of the movable sensing mechanism.

[0025] These include: 1. Car door; 2. Slider; 3. Threshold device; 5. Lintel device; 6. Movable sensing mechanism; 7. Sensing frame; 8. Turn plate; 9. Sensing switch; 10. Return spring; 11. Connecting shaft; 12. Light curtain. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0027] In the description of the present invention, it should be understood that the terms "left side," "right side," "upper," "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Terms such as "first" and "second" do not indicate the importance of a component and therefore should not be construed as limiting the present invention. The specific dimensions used in this embodiment are merely for illustrative purposes and do not limit the scope of protection of the present invention.

[0028] like Figure 1-8 As shown, a safety device for foreign objects entrapped in elevator doors includes a sill device 3 and a movable sensing mechanism 6. The sill device 3 is mounted at the bottom of the elevator door and has a mounting notch. The movable sensing mechanism 6 includes a sensing frame 7, a rotating plate or telescopic plate 8, a connecting shaft 11, and a sensing switch 9. The sensing frame 7 is connected to the mounting notch. The rotating plate or telescopic plate 8 and the sensing frame 7 have corresponding connecting holes. The rotating plate or telescopic plate 8 is rotatably connected to the top of the sensing frame 7 via the connecting shaft 11 passing through the connecting hole. The sensing switch 9 is mounted on the sensing frame 7 below the rotating plate or telescopic plate 8. The present invention designs a safety device for foreign objects entrapped in elevator doors, including a sill device 3 and a movable sensing mechanism 6. When a foreign object is trapped in the door gap or the gap at the bottom of the door and the elevator car is pulled upward, the rotating plate or telescopic plate 8 deflects, triggering the sensing switch 9 to output a signal, triggering the safety circuit and stopping the elevator. Restarting the elevator requires manual reset or manual operation by rescue personnel.

[0029] The utility model further comprises a resetting device, which is connected to the rotating plate or the telescopic plate 8. The resetting device facilitates the resetting of the rotating plate or the telescopic plate 8.

[0030] The reset device is a reset spring 10 , one end of which is connected to the bottom of the rotating plate or the telescopic plate 8 , and the other end is connected to the sensing frame 7 .

[0031] It also includes a car, a car door 1 and a lintel device 5; a slider 2 is provided at the bottom of the car door 1, and a slide groove is provided at the bottom of the sill device 3, the slider 2 is movably arranged in the slide groove, the car is arranged on the inner side of the car door 1, and the lintel device 5 is arranged above the car.

[0032] The lintel device 5 is provided with a mounting slot, and a motion sensing mechanism 6 is provided on the upper side of the car of the lintel device 5. When the elevator door is opened normally, the rope and the like are not sensed by the light curtain 12 or the safety touch panel, or when the elevator is below the landing door, the car door 1 and the landing door are closed normally, and the elevator is descending, when the rope or rod-like object is stressed at both ends or the car and the landing door frame are misaligned, the rotating plate or telescopic plate 8 is deflected or retracted by the stress angle, the induction switch 9 is triggered, the safety circuit is triggered, and the elevator stops running. Restarting requires manual reset or manual operation by rescue personnel.

[0033] It also includes a light curtain 12, which is arranged on the corresponding two sides of the car door 1. The light curtain 12 includes a plurality of corresponding infrared emitting tubes and infrared receiving tubes; the infrared emitting tubes and infrared receiving tubes are respectively arranged on the corresponding two sides of the two car doors 1.

[0034] The induction switch 9 is an action switch or a photoelectric induction switch. An elevator control system is also included, and the induction switch 9 is electrically connected to the elevator control system.

[0035] The working principle of this utility model:

[0036] like Figure 6 As shown, the elevator door is open normally, the rope is not sensed by the light curtain 12 or the safety touch panel, or the car door 1 and the landing door are closed normally, and the elevator is moving upward. When the rope or rod-like object is stressed at both ends or the car is misaligned with the landing door frame, the rotating plate or telescopic plate 8 deflects or contracts under the force, triggering the sensor switch 9, triggering the safety circuit, and stopping the elevator. Restarting the elevator requires manual reset or manual operation by rescue personnel.

[0037] like Figure 7 As shown, the elevator door is open normally, the rope is not sensed by the light curtain 12 or the safety touch panel, or the car door 1 and the landing door are closed normally, and the elevator is descending. When the rope or rod-like object is stressed at both ends or the car is misaligned with the landing door frame, the turntable 8 deflects or contracts, triggering the sensor switch 9 and the safety circuit, stopping the elevator. Restarting the elevator requires manual reset or manual operation by rescue personnel.

[0038] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. An elevator door foreign body clamping safety device, characterized by: The invention comprises a sill device (3) and a movable sensing mechanism (6); the sill device (3) is arranged at the bottom of the elevator door, and the sill device (3) is provided with a mounting notch; the movable sensing mechanism (6) comprises a sensing frame (7), a rotating plate or a telescopic plate (8), a connecting shaft (11) and a sensing switch (9); the sensing frame (7) is connected to the mounting notch, the rotating plate or the telescopic plate (8) and the sensing frame (7) are provided with corresponding connecting holes, the rotating plate or the telescopic plate (8) is rotatably connected to the top of the sensing frame (7) through the connecting shaft (11) passing through the connecting hole, and the sensing switch (9) is arranged on the sensing frame (7) below the rotating plate or the telescopic plate (8).

2. The elevator door foreign body clamping safety device according to claim 1, characterized in that: It also includes a reset device, which is connected to the rotating plate or the telescopic plate (8).

3. The elevator door foreign body clamping safety device according to claim 2, characterized in that: The reset device is a reset spring (10), one end of the reset spring (10) is connected to the bottom of the rotating plate or the telescopic plate (8), and the other end is connected to the sensing frame (7).

4. The elevator door foreign body clamping safety device according to claim 1, characterized in that: The invention also includes a car, a car door (1) and a lintel device (5); a slider (2) is provided at the bottom of the car door (1), and a slide groove is provided at the bottom of the sill device (3); the slider (2) is movably arranged in the slide groove, the car is arranged on the inner side of the car door (1), and the lintel device (5) is arranged above the car.

5. The elevator door foreign object clamping safety device according to claim 4, characterized in that: The lintel device (5) is provided with a mounting groove, and a movable sensing mechanism (6) is provided in the mounting groove on the upper side of the car of the lintel device (5).

6. The elevator door foreign body clamping safety device according to claim 4, characterized in that: It also includes a light curtain (12), which is arranged on the corresponding two sides of the car door (1), and the light curtain (12) includes a plurality of corresponding infrared emitting tubes and infrared receiving tubes; the infrared emitting tubes and infrared receiving tubes are respectively arranged on the corresponding sides of the two car doors (1).

7. The elevator door foreign object clamping safety device according to claim 1, characterized in that: The induction switch (9) is an action switch or a photoelectric induction switch.

8. The elevator door foreign object clamping safety device according to claim 1, characterized in that: It also includes an elevator control system, and the induction switch (9) is electrically connected to the elevator control system.

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