Elevator car door safety protection device

Abstract

The utility model discloses an elevator car door safety protection device which is arranged between an elevator car door and a car control wall and comprises a fixed plate sealing plate, a fixed plate, a movable plate, a spring hinge and a micro travel switch. The fixing plate sealing plate and the fixing plate are connected through a fastener to form a fixing frame, and the fixing frame is fixed to the car door side of the car control wall. A spring hinge mounting plate is arranged on the movable plate, the movable plate is connected with a plurality of spring hinges through the spring hinge mounting plate, the movable plate can rotate around central shafts of the spring hinges under the action of external force, and the movable plate is connected with the fixed plate through the spring hinges; a plurality of microswitches are arranged on the side, facing the movable plate, of the fixed plate, contacts of the microswitches point to the movable plate, touch gaps are reserved between the contacts and the movable plate, and when the movable plate rotates, the contacts are triggered; and the microswitch is connected with an elevator car door driving circuit. The car door can stop moving after a foreign matter is clamped between the front wall of the elevator and the door leaf, and can automatically reset after a fault is removed.

Description

Technical Field

[0001] The utility model relates to the field of elevator equipment safety protection, in particular to an elevator car door safety protection device. Background Art

[0002] The existing elevator standards stipulate that the gap between elevator door panels and between door panels and columns, lintels and sills shall not exceed 6mm for passenger elevators; and shall not exceed 8mm for freight elevators. Due to wear during use, it is allowed to reach 10mm. Despite the relevant regulations on matching clearances, it is still easy for foreign objects to get stuck or fingers to get pinched during the door opening process, causing damage to the equipment or personal injury. In particular, children's fingers are generally about 6mm in diameter. As the gap between the elevator door increases, fingers are easily pinched into the gap between the elevator car door and the front wall column, causing injury. At present, elevator car door protection devices usually use door light curtains or safety touch panels. These devices only serve as a warning for foreign objects between the car doors and within the car door range during the closing process of the car door. They cannot protect against foreign objects during the opening process of the car door and in the matching gap between the car door and the column, lintel and sill. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an elevator car door safety protection device, which can stop the elevator car door from opening if a foreign object is stuck in the door gap at any position on both sides or a child's finger is caught in the door gap at any position on both sides during the door opening process, thereby protecting the elevator equipment and passengers. Combined with the existing door light curtain protection device, comprehensive protection of the elevator door opening and closing can be achieved.

[0004] A technical solution to achieve the above object is: an elevator car door safety protection device, which is arranged between the elevator car door and the car operating wall, including a fixed plate sealing plate, a fixed plate, a movable plate, a spring hinge and a micro travel switch;

[0005] The fixed plate sealing plate and the fixed plate are connected by fasteners to form a fixed frame, and the fixed frame is fixed to the car door side of the car operating wall; a spring hinge mounting plate is provided on the movable plate, and the movable plate is connected to a plurality of spring hinges through the spring hinge mounting plate, and can rotate around the central axis of the spring hinge under the action of external force, and the movable plate is connected to the fixed plate through the spring hinge; a plurality of micro switches are provided on the side of the fixed plate facing the movable plate, and the contacts of the micro switches point to the movable plate, leaving a touch gap with the movable plate, and when the movable plate rotates, the contacts are triggered; the micro switches are connected to the elevator car door drive circuit.

[0006] Furthermore, a space for installing a safety protection device is reserved on the car door side of the car operating wall.

[0007] Furthermore, a plurality of spring hinges are arranged at equal intervals on the spring hinge mounting plate, and the number of the spring hinges matches the height of the car door.

[0008] Furthermore, a rotation gap of 3-4 mm is left between the movable plate and the fixed plate, so that the movable plate will not interfere with the fixed plate when rotating.

[0009] Furthermore, a micro switch is respectively provided on the upper part, the middle part and the lower part of the movable plate.

[0010] Furthermore, a touch gap of 2-3 mm is maintained between the contact of the micro switch and the movable plate.

[0011] Beneficial effects of the utility model:

[0012] The utility model can effectively prevent hands or fingers from being pinched at any position during the door opening process, and can also prevent foreign objects from getting stuck and causing damage to the equipment. After the fingers or foreign objects are removed from the pinched area, the elevator car door can automatically reset and resume operation. Combined with the existing elevator door light curtain equipment, the elevator car door system can achieve comprehensive safety protection in both the opening and closing directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the general assembly of an elevator car door safety protection device of the utility model;

[0014] Figure 2 for Figure 1 A detailed enlarged picture of point A;

[0015] Figure 3 is a front view of an anti-pinch device assembly;

[0016] Figure 4 A side view of the anti-pinch device assembly. DETAILED DESCRIPTION

[0017] In order to better understand the technical solution of the utility model, the following is a detailed description through specific embodiments:

[0018] See also Figure 1 The main structure of the elevator includes an elevator car door sill assembly 1, a car door assembly 2, and a front wall assembly 3. The car door moves horizontally under the drag of the door machine motor, and the sill assembly 1 provides guidance and positioning. In the traditional car door structure, there is a gap of 4-6mm between the car door assembly 2 and the front wall assembly 3, without any other structure. The car anti-pinch function of the car door protection device of the utility model can be realized on the left side of the elevator control wall assembly 3 and the right side of the front wall assembly 4. The utility model provides an elevator car door safety protection device 5, which is installed between the car door assembly 2 and the front wall assembly 4, and the front wall assembly 4 is designed on the car door side with reserved installation space for the elevator car door safety protection device 5.

[0019] See also Figures 2 to 4The elevator door safety protection device 5 includes a fixed plate sealing plate 501, a sealing plate fastener 502, a fixed plate fastener 503, a fixed plate 504, a movable plate fastener 505, a spring hinge mounting plate 506, a spring hinge 507, a movable plate 508, a micro-travel switch 509 and a micro-travel switch fastener. The fixed plate sealing plate 501 is fixed to the front wall assembly 4 through the sealing plate fastener 502, and the fixed plate 504 is connected and fixed to the fixed plate sealing plate 501 through the fixed plate fastener 503, and the two form a fixed frame. The fixed frame reserves installation space and interfaces for other components while ensuring the appearance of the elevator. The movable plate 508 is consistent with the door opening height, and is connected to the spring hinge mounting plate 506 through the movable plate fastener 505. The spring hinge mounting plate 506 is provided with a plurality of spring hinges 507. The movable plate 508 is connected to the fixed plate 504 through the spring hinge 507, and can rotate around the central axis of the spring hinge 507 under the action of external force to form a connecting rod mechanism. A gap of 3 to 4 mm is left between the movable plate 508 and the fixed plate 504 to ensure that the movable plate 508 has enough rotation space, and the rotating parts can be reset under the action of the spring elastic force. The specific number of spring hinges 507 is determined by the door opening height of the elevator car door. On the side of the fixed plate 504 facing the movable plate 508, three micro switches 509 are respectively provided at the upper, middle and lower positions, and the contacts of the micro switches point to the movable plate 508, leaving a touch gap of 2 to 3 mm with the movable plate.

[0020] Under normal circumstances, the movable plate 508 is kept in position by the spring hinge 507. When opening and closing the door, if a foreign object is stuck between the movable plate 508 and the car door assembly 2, the car door assembly 2 will not move forward or backward under the positioning of the sill assembly 1, but will still open the door in the horizontal direction, thereby generating a squeezing force on the movable plate 508 through the foreign object, and the movable plate 508 rotates under the force, triggering the micro-travel switch 509 to operate, thereby cutting off the door machine drive circuit and stopping the door opening action, thereby protecting the equipment or passengers. When the foreign object or finger is removed from the pinched area, the movable plate rebounds to the initial position under the action of the reset spring and remains there, and the door circuit is powered on again.

[0021] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An elevator door safety protection device, which is arranged between the elevator door and the car operating wall, characterized in that: It includes a fixed plate sealing plate, a fixed plate, a movable plate, a spring hinge and a micro travel switch; The fixed plate sealing plate and the fixed plate are connected by fasteners to form a fixed frame, and the fixed frame is fixed to the car door side of the car operating wall; a spring hinge mounting plate is provided on the movable plate, and the movable plate is connected to a plurality of spring hinges through the spring hinge mounting plate, and can rotate around the central axis of the spring hinge under the action of external force, and the movable plate is connected to the fixed plate through the spring hinge; a plurality of micro switches are provided on the side of the fixed plate facing the movable plate, and the contacts of the micro switches point to the movable plate, leaving a touch gap with the movable plate, and when the movable plate rotates, the contacts are triggered; the micro switches are connected to the elevator car door drive circuit.

2. An elevator door safety protection device according to claim 1, characterized in that: There is space reserved on the car door side of the car operating wall for installing safety protection devices.

3. An elevator door safety protection device according to claim 1, characterized in that: A plurality of spring hinges are arranged at equal intervals on the spring hinge mounting plate, and the number of the spring hinges matches the height of the car door.

4. The elevator door safety protection device according to claim 1, characterized in that: A rotation gap of 3-4 mm is left between the movable plate and the fixed plate so that the movable plate will not interfere with the fixed plate when rotating.

5. The elevator door safety protection device according to claim 1, characterized in that: A micro switch is respectively arranged on the upper part, the middle part and the lower part of the movable plate.

6. An elevator door safety protection device according to claim 5, characterized in that: A touch gap of 2-3 mm is maintained between the contact of the micro switch and the movable plate.

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