Anti-pinch device for elevator door

Abstract

The utility model relates to the technical field of elevator safety protection, in particular to an anti-pinch device for an elevator door, which comprises a support frame, a guide block arranged below the support frame, a sliding groove arranged in the guide block, a shielding door slidably mounted in the sliding groove, and a plurality of support blocks arranged in the middle of the support frame and integrally formed with the support frame. Transverse plates integrally formed with the supporting blocks are arranged at the tops of the supporting blocks, infrared sensors are fixedly installed at the tops of the transverse plates, a power device is fixedly installed at the top of the supporting frame, and an anti-pinch device is arranged on one side of the power device. The shielding door is further provided with the inclined rotatable infrared sensor, the detection range can be further increased, the shielding door is further sleeved with the protective sleeve, hurt caused when people are clamped can be reduced, the first motor and the transmission column can be disconnected through the magnetic coupler when the load is too large, and damage to the motor or heavier hurt to people are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety protection, in particular to an anti-pinch device for elevator doors. Background Technique

[0002] An elevator is a convenient facility for vertically transporting people or goods. It moves the elevator car up and down along the track through mechanical principles such as electric motors and steel cables or hydraulic systems to achieve the purpose of convenient and fast transportation. In modern society, elevators have become an indispensable and important part of life and work, especially in high-rise buildings or underground places, where their role is more prominent. In order to ensure the safety of passengers and goods and avoid pinching accidents, people usually set anti-pinch devices on elevator doors to prevent pinching accidents.

[0003] For this reason, the utility model patent with the publication number of CN212608943U discloses an elevator door anti-pinch device, which includes a first motor, a car, an elevator door moving mechanism, a first door receiving groove, a second door receiving groove, an infrared sensing mechanism, an elevator door blocking mechanism and a signal receiver. The first motor is installed on the top of the car, the first motor is connected to the elevator door moving mechanism, the elevator door moving mechanism is connected to the first elevator door and the second elevator door, the infrared sensing mechanism is respectively arranged in the first door receiving groove and the second door receiving groove, the elevator door blocking mechanism is respectively arranged on both sides inside the T-shaped guide rail, and the signal receiver is arranged inside the elevator door blocking mechanism. This elevator door anti-pinch device emits infrared signals through an infrared signal transmitter, reflects the infrared rays by using the reflecting lenses installed in the first door receiving groove and the second door receiving groove, and finally receives the infrared signals by the infrared signal receiver. When the infrared signal is blocked, the signal receiver will receive the signal and pop out the stopper through the lifting rod to prevent the elevator door from closing, eliminating the hidden danger caused by the closing of the elevator door.

[0004] However, this patent avoids the closing of the elevator door by setting a stopper, and the stopper protrudes outwards, which may trip the user or be stepped on by the user during use, having certain potential safety hazards. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-pinch device for elevator doors in view of the above-mentioned deficiencies of the prior art, which can effectively avoid tripping the user and being damaged by the user.

[0006] The technical solution adopted by the utility model is an anti-pinch device for elevator doors, which includes a support frame. A guiding block is arranged below the support frame, a sliding groove is opened in the guiding block, and a shielding door is slidably installed in the sliding groove. A plurality of support blocks integrally formed with the support frame are arranged in the middle of the support frame. Horizontal plates integrally formed with the plurality of support blocks are arranged on the tops of the plurality of support blocks, and infrared sensors are fixedly installed on the tops of the horizontal plates. A power device is fixedly installed on the top of the support frame, and an anti-pinch device is arranged on one side of the power device.

[0007] Preferably, the power device includes a first motor. The stator part of the first motor is fixedly connected to the top of the support frame, and the rotor part of the first motor is fixedly connected to the transmission column. First threads and second threads are fixedly installed at both ends of the transmission column, and the directions of the first thread and the second thread are opposite. Connecting columns are fixedly connected to the surfaces of the first thread and the second thread, and a shielding door is fixedly connected to the bottom of the connecting column.

[0008] Preferably, the anti-pinch device includes a receiving block. The receiving block is fixedly installed on the outer side of the top of the connecting column. A receiving groove is formed in the receiving block. A spring and a first clamping block are arranged in the receiving groove. One end of the spring is fixedly connected to the bottom of the receiving groove, and the other end is fixedly connected to the top of the first clamping block. A second clamping block is arranged on one side of the first clamping block, and a cylinder is fixedly connected to one surface of the second clamping block. The cylinder is fixedly installed on the top of the support frame.

[0009] Preferably, the infrared sensors at both ends of the plurality of infrared sensors are inclined, and second motors are fixedly connected to the outer walls of one ends of the two infrared sensors. The second motors are fixedly installed on the top of the cross plate.

[0010] Preferably, a protective cover is sleeved on the surface of the shielding door.

[0011] Preferably, a magnetic coupling is provided at the connection between the first motor and the transmission column.

[0012] The utility model is simple and convenient to use. Just start the first motor. The rotation of the first motor will drive the transmission column to rotate. The rotation of the transmission column will drive the first thread and the second thread to rotate. The rotation of the first thread and the second thread will drive the connecting column to move, thereby driving the shielding door to move to open the door. When the connecting column moves, it will drive the receiving block to move, thereby driving the first clamping block to move. When the first clamping block moves during door opening, it will cooperate with the second clamping block. At this time, the first clamping block will be clamped by the second clamping block, thereby fixing the connecting column and preventing it from moving, thereby preventing the shielding door from moving and avoiding pinching people. When the infrared sensor fails to detect a person, it will give a signal to the cylinder, thereby causing the cylinder to contract, so that the cooperation between the first clamping block and the second clamping block is lost. At this time, start the first motor to reverse to close the door.

[0013] Compared with the prior art, the beneficial effects of the utility model are that it is provided with an anti-pinch device, which can effectively limit the movement of the shielding door when opening the door and avoid pinching people. It is also provided with inclined infrared sensors, which can effectively improve the detection range. A protective cover is also sleeved on the shielding door, which can effectively reduce the injury caused by pinching people. A magnetic coupling is also provided. When the shielding door pinches a person and causes an excessive load, the connection between the first motor and the transmission column can be disconnected to protect the first motor and the user. Description of the Drawings

[0014] Figure 1Schematic structural diagram of an anti-pinch device for elevator doors proposed by the present utility model;

[0015] Figure 2 Enlarged view of part A of the present utility model;

[0016] Figure 3 Enlarged view of part B of the present utility model;

[0017] Figure 4 Front view of an anti-pinch device for elevator doors proposed by the present utility model.

[0018] Description of reference numerals in the figure

[0019] 1. Support frame; 12. Guide block; 13. Shielding door; 2. Support block; 21. Horizontal plate; 22. Infrared sensor; 23. Second motor; 3. Power device; 31. First motor; 32. Connecting column; 33. Transmission column; 34. First thread; 35. Second thread; 4. Anti-pinch device; 41. Receiving block; 42. Receiving groove; 43. Spring; 44. First clamping block; 45. Second clamping block; 46. Cylinder; 5. Magnetic coupler. Specific implementation manner

[0020] Figure 1 and Figure 4Schematically shows an anti-pinch device for an elevator door of the present utility model, including a support frame 1. A guide block 12 is provided below the support frame 1. A chute is formed in the guide block 12, and a shielding door 13 is slidably installed in the chute. A plurality of support blocks 2 integrally formed with the support frame 1 are provided in the middle of the support frame 1. A cross plate 21 integrally formed with the plurality of support blocks 2 is provided at the top of each of the plurality of support blocks 2. Infrared sensors 22 are fixedly installed on the top of the cross plate 21. The infrared sensors 22 can adopt models such as ETT-RG20. This model can stably detect the movement of objects even in extremely dark or extremely bright environments. A power device 3 is fixedly installed on the top of the support frame 1. An anti-pinch device 4 is provided on one side of the power device 3. The power device 3 includes a first motor 31. The stator part of the first motor 31 is fixedly connected to the top of the support frame 1, and the rotor part of the first motor 31 is fixedly connected to a transmission column 33. First threads 34 and second threads 35 are fixedly installed at both ends of the transmission column 33, and the directions of the first thread 34 and the second thread 35 are opposite. Connecting columns 32 are fixedly connected to the surfaces of the first thread 34 and the second thread 35. The bottom of the connecting column 32 is fixedly connected to the shielding door 13. The infrared sensors 22 at both ends of the plurality of infrared sensors 22 are inclined, and second motors 23 are fixedly connected to the outer walls of one ends of the two infrared sensors. The second motors 23 are fixedly installed on the top of the cross plate 21. A protective sleeve is sleeved on the surface of the shielding door 13. The protective sleeve can be made of materials such as rubber or sponge, which can effectively reduce the injury caused by pinching people. A magnetic coupling 5 is provided at the connection between the first motor 31 and the transmission column 33. The magnetic coupling 5 can adopt models such as HSFO8. This model can disconnect the connection when the motor load is too large during pinching, thereby protecting the first motor 31 and avoiding further injury to the pinched person.

[0021] Such as Figure 2 And Figure 3The anti-pinch device 4 shown includes a receiving block 41, which is fixedly installed on the outer side of the top of the connecting column 32. A receiving groove 42 is formed in the receiving block 41. A spring 43 and a first clamping block 44 are arranged in the receiving groove 42. One end of the spring 43 is fixedly connected to the bottom of the receiving groove 42, and the other end is fixedly connected to the top of the first clamping block 44. A second clamping block 45 is arranged on one side of the first clamping block 44. A cylinder 46 is fixedly connected to one side of the second clamping block 45. The cylinder 46 is fixedly installed on the top of the support frame 1. In actual use, only the first motor 31 needs to be started. The rotation of the motor 31 will drive the transmission column 33 to rotate, and then drive the first thread 34 and the second thread 35 to rotate. The rotation of the first thread 34 and the second thread 35 will drive the connecting column 32 to move, and then drive the shielding door 13 to move in the guiding block 12, so as to open the shielding door 13. When the connecting column 32 moves, it will also drive the receiving block 41 to move, and then drive the first clamping block 44 to move. When the first clamping block 44 moves during door opening, it will contact the second clamping block 45, and the second clamping block 45 will push the first clamping block 44 to compress the spring 43. When the connecting column 32 continues to move and the first clamping block 44 loses contact with the second clamping block 45, the compressed spring 43 will reset and then push the first clamping block 44 to move. At this time, the second clamping block 45 will clamp the first clamping block 44, so as to prevent the connecting column 32 from moving in the reverse direction, thereby restricting the moving direction of the shielding door 13. At this time, the multiple infrared sensors 22 perform scanning. The second motor 23 will drive the infrared sensors 22 on both sides to perform a semi-circular motion, so as to perform a full-range detection. When the infrared sensors 22 do not detect any personnel or objects, the cylinder 46 can be started to contract. The contraction of the cylinder 46 will drive the second clamping block 45 to move, so that the second clamping block 45 loses the restriction on the first clamping block 44, so that the connecting column 32 can drive the shielding door 13 to move. At this time, only the first motor 31 needs to be started and reversed to close the shielding door 13.

[0022] The above-mentioned multiple infrared sensors 22, second motor 23, first motor 31, and cylinder 46 can all be connected by wires through a single-chip microcomputer of model A96T218GDN. This type of single-chip microcomputer can effectively process various signals, which is convenient for controlling the above-mentioned devices.

Claims

1. An anti-pinch device for an elevator door, comprising a support frame (1), characterized in that: A guide block (12) is provided below the support frame (1), a slide groove is provided in the guide block (12), a shielding door (13) is slidably installed in the slide groove, a plurality of support blocks (2) integrally formed with the support frame (1) are provided in the middle of the support frame (1), a transverse plate (21) integrally formed with the support block (2) is provided on the top of each of the plurality of support blocks (2), an infrared sensor (22) is fixedly installed on the top of each of the transverse plates (21), a power device (3) is fixedly installed on the top of the support frame (1), and an anti-pinch device (4) is provided on one side of the power device (3).

2. An anti-pinch device for elevator doors according to claim 1, characterized in that: The power device (3) comprises a first motor (31), a stator portion of the first motor (31) is fixedly connected to the top of the support frame (1), a rotor portion of the first motor (31) is fixedly connected to a transmission column (33), two ends of the transmission column (33) are respectively fixedly mounted with a first thread (34) and a second thread (35), and the first thread (34) and the second thread (35) are in opposite directions, the surfaces of the first thread (34) and the second thread (35) are both fixedly connected to a connection column (32), and the bottom of the connection column (32) is fixedly connected to a shielding door (13).

3. An anti-pinch device for elevator doors according to claim 2, characterized in that: The anti-pinch device (4) comprises a receiving block (41), the receiving block (41) is fixedly mounted on the outer side of the top of the connecting column (32), a receiving groove (42) is provided in the receiving block (41), a spring (43) and a first clamping block (44) are provided in the receiving groove (42), one end of the spring (43) is fixedly connected to the bottom of the receiving groove (42), and the other end is fixedly connected to the top of the first clamping block (44), a second clamping block (45) is provided on one side of the first clamping block (44), and a cylinder (46) is fixedly connected to one side of the second clamping block (45), and the cylinder (46) is fixedly mounted on the top of the supporting frame (1).

4. An anti-pinch device for elevator doors according to claim 1, 2 or 3, characterized in that: The infrared sensors (22) at both ends of the plurality of infrared sensors (22) are arranged obliquely, and the outer walls of one end of the two infrared sensors are fixedly connected to a second motor (23), and the second motor (23) is fixedly mounted on the top of the horizontal plate (21).

5. An anti-pinch device for elevator doors according to claim 1, 2 or 3, characterized in that: The surface of the shielding door (13) is covered with a protective cover.

6. The anti-pinch device for elevator door according to claim 4, characterized in that: The surface of the shielding door (13) is covered with a protective cover.

7. The anti-pinch device for elevator door according to claim 2, characterized in that: A magnetic coupler (5) is provided at the connection between the first motor (31) and the transmission column (33).

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