Anti-shearing system for elevator door opening

Abstract

The utility model discloses an elevator door opening anti-shearing system which comprises a control device, an electric rotating shaft and an anti-shearing baffle, the anti-shearing baffle is arranged on the upper edge of an elevator shaft door opening through the electric rotating shaft, the anti-shearing baffle is connected with the electric rotating shaft in a rotating mode, and the signal input end of the control device is connected with an elevator control MCU. The signal output end of the control device is connected with the electric rotating shaft, and when the control device receives a maintenance state communication instruction sent by the elevator control MCU, the electric rotating shaft is driven to drive the anti-shearing baffle to rotate towards the elevator shaft, so that an inclined face is formed on the upper edge of a door opening of the elevator shaft. According to the utility model, shearing accidents can be prevented, and the safety of the elevator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety, and particularly relates to an anti-shearing system for an elevator door opening. Background Art

[0002] An elevator is a vertical transportation device, which includes a car door and a landing door. The landing door exists in each elevator, that is, the door opening. During the installation and maintenance of elevators, shearing accidents have occurred many times, resulting in serious injuries and deaths. As long as an accident occurs, the minimum degree of injury is serious injury.

[0003] The reason for the accident is that during the installation and maintenance of the elevator, because the landing door is not installed or the landing door is in an open state, that is, the door opening is in a hollow state. When the installer or maintainer operates the elevator to run at the elevator car top, for installation adjustment and maintenance verification, a part of the person's body needs to reach into the door opening, and the elevator is operated upward. Due to negligence or slow reaction, a human body shearing accident occurs between the elevator car top and the upper edge of the door opening, as Figure 1 shown. Content of the Utility Model

[0004] The purpose of the utility model is to prevent the occurrence of shearing accidents and improve the safety of the elevator, and provide an anti-shearing system for the elevator door opening.

[0005] The technical solution of the utility model is as follows:

[0006] An anti-shearing system for an elevator door opening includes a control device, an electric rotating shaft, and an anti-shearing baffle. The anti-shearing baffle is arranged at the upper edge of the elevator shaft door opening through the electric rotating shaft. The anti-shearing baffle is rotationally connected with the electric rotating shaft. The signal input end of the control device is connected to the elevator control MCU, and the signal output end of the control device is connected to the electric rotating shaft. When the control device receives the maintenance status communication instruction sent by the elevator control MCU, it drives the electric rotating shaft to drive the anti-shearing baffle to rotate towards the direction of the elevator shaft, so as to form an inclined plane at the upper edge of the elevator shaft door opening.

[0007] Wherein, the rotation angle of the anti-shearing baffle is greater than 45° and less than 60°.

[0008] Wherein, the width of the anti-shearing baffle is the same as the thickness of the elevator shaft wall.

[0009] Wherein, the length of the anti-shearing baffle is the same as the length of the upper edge of the elevator shaft door opening.

[0010] Wherein, the control device is arranged in the elevator control cabinet and is communicatively connected with the elevator control MCU.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model is provided with a shear prevention baffle rotatably arranged at the upper edge of the door opening of the elevator shaft. When the elevator car top is in the maintenance state, the elevator control MCU will send a communication instruction to the control device. After receiving the information, the control device drives the electric rotating shaft of each door opening to drive the shear prevention baffle to rotate to the designated protection position. After the shear prevention baffle rotates to the designated protection position, when the elevator car top operates the elevator to move upward, if a person touches the shear prevention baffle, the person will slide along the shear prevention baffle into the elevator shaft and finally slide out of the door opening, preventing shearing, thereby protecting personal safety and avoiding the occurrence of shear accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of a human body shear accident occurring in the prior art;

[0014] Figure 2 It is a structural schematic diagram of an elevator door opening shear prevention system provided by the present utility model;

[0015] Figure 3 It is a circuit block diagram of an elevator door opening shear prevention system provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0017] In order to illustrate the technical solutions described in the present utility model, the following is illustrated through specific embodiments.

[0018] Embodiment

[0019] Please refer to Figure 2 、 Figure 3, this embodiment provides an elevator door opening anti-shearing system, which includes a control device, an electric rotating shaft 1, and an anti-shearing baffle 2. The anti-shearing baffle 2 is arranged on the upper edge of the elevator hoistway door opening through the electric rotating shaft 1. The anti-shearing baffle 2 is rotatably connected to the electric rotating shaft 1. When the electric rotating shaft 1 rotates forward and backward, the anti-shearing baffle 2 also rotates synchronously, and the rotation angle is greater than 45° and less than 60°. The width of the anti-shearing baffle 2 is the same as the thickness of the elevator hoistway wall, and the length of the anti-shearing baffle 2 is the same as the length of the upper edge of the elevator hoistway door opening. A set of electric rotating shaft 1 and anti-shearing baffle 2 are arranged at each door opening; the control device is arranged in the elevator control cabinet, its signal input end is communicatively connected to the elevator control MCU, and its signal output end is connected to the electric rotating shaft 1.

[0020] When the elevator car top is in the maintenance state, the elevator control MCU sends a communication instruction to the control device. After receiving the information, the control device drives the electric rotating shaft 1 at each door opening to drive the anti-shearing baffle 2 to rotate towards the elevator hoistway, and rotates to the specified protection position, so that the upper edge of the elevator hoistway door opening forms an inclined plane.

[0021] After the anti-shearing baffle 2 rotates to the specified protection position, the elevator car top operates the elevator to run upward. When the situation such as Figure 1 occurs, due to the existence of the anti-shearing baffle 2, the situation such as Figure 2 will occur. When a person touches the anti-shearing baffle 2, the person will slide along the anti-shearing baffle 2 into the hoistway, and finally the body slides out of the door opening to prevent shearing.

[0022] The upward movement of the elevator can prevent shearing, and the downward movement of the elevator will not cause shearing. However, for safety redundancy (if it is set that when the car top is in the maintenance state and runs upward, the anti-shearing baffle 2 will rotate to the specified protection position. Then during operation, when the car top is in the maintenance state, it first runs downward and then upward. This operation interval time cannot ensure that the anti-shearing baffle 2 rotates to the specified protection position in time), as long as the elevator car top is in the maintenance state, the anti-shearing baffle 2 remains in the specified protection position.

[0023] When the elevator car top exits the maintenance state, the elevator control MCU sends a communication message to the control device, and the control device drives the electric rotating shaft 1 to drive the anti-shearing baffle 2 to reset, that is, the anti-shearing baffle 2 coincides with the upper edge of the door opening.

[0024] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An elevator door opening anti-shearing system, characterized in that: It includes a control device, an electric rotating shaft and a shear-proof baffle. The shear-proof baffle is arranged at the upper edge of the elevator shaft door opening through the electric rotating shaft. The shear-proof baffle is rotatably connected to the electric rotating shaft. The signal input end of the control device is connected to the elevator control MCU, and the signal output end of the control device is connected to the electric rotating shaft. When the control device receives the maintenance status communication instruction sent by the elevator control MCU, it drives the electric rotating shaft to drive the shear-proof baffle to rotate towards the elevator shaft, so as to form an inclined plane at the upper edge of the elevator shaft door opening.

2. The anti-shearing system for an elevator door opening according to claim 1, wherein: The rotation angle of the shear-proof baffle is greater than 45° and less than 60°.

3. The anti-shearing system for elevator door openings according to claim 1, wherein: The width of the shear-proof baffle is the same as the thickness of the elevator shaft wall.

4. The anti-shearing system for elevator door openings according to claim 1, characterized in that: The length of the shear-proof baffle is the same as the length of the upper edge of the elevator shaft door opening.

5. The anti-shearing system for elevator door openings according to claim 1, wherein: The control device is arranged in the elevator control cabinet and is communicatively connected to the elevator control MCU.

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