Anti-pinch device of elevator

Abstract

The utility model relates to the technical field of construction elevators, in particular to an anti-pinch device of an elevator, which comprises a telescopic plate, a proximity switch, a metal detection body and an actuating mechanism. A containing groove with the lower end communicating with the outside is formed in the bottom of the cage door, the telescopic plate is arranged in the containing groove in an up-down telescopic mode, limiting plates fixedly connected with the cage door are arranged at the two ends of the telescopic plate, in the initial state, the lower portion of the telescopic plate is located on the outer side of the containing groove, and the lower end faces of the limiting plates are flush with the lower end face of the telescopic plate. The proximity switch is arranged at the top in the containing groove. The metal detection body is installed on the top face of the telescopic plate and matched with the proximity switch. The executing mechanism is connected with the cage door and the proximity switch and used for driving the cage door to be opened or closed. When the suspension cage door is closed, the suspension cage door moves downwards, and when the suspension cage door encounters an obstacle, the obstacle touches the telescopic plate to enable the telescopic plate to move upwards relative to the suspension cage door, so that the metal detection body gets close to the proximity switch, the metal detection body gets close to the proximity switch, and the execution mechanism drives the suspension cage door to be opened.

Description

Technical Field

[0001] This utility model relates to the field of construction hoist technology, and more specifically, to a hoist anti-pinch device. Background Technology

[0002] Construction hoists consist of several parts, including a cage, drive mechanism, standard sections, wall attachments, chassis, railings, and electrical system. They are commonly used construction machinery for carrying people and goods. Due to their unique box-like structure, they are both comfortable and safe to ride. Construction hoists are usually used in conjunction with tower cranes on construction sites. Their load capacity is generally between 0.3 and 3.6 tons, and their operating speed varies from 1 to 96 m / min.

[0003] Traditionally, the cage doors of construction hoists are opened and closed manually. With increasingly demanding construction site requirements and the development of automated control technology, electrically operated cage doors have emerged. This not only reduces the workload of drivers and passengers but also improves the user experience. However, improper control of electrically operated cage doors can lead to accidents causing injuries such as people being pinched. Therefore, providing an anti-pinch device suitable for construction hoist cage doors is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide an anti-pinch device for elevators that can solve the aforementioned problems.

[0005] An anti-pinch device for a hoist includes a telescopic plate, a proximity switch, a metal detector, and an actuator. The bottom of the hoist cage door has a receiving groove with its lower end communicating with the outside. The telescopic plate is telescopically positioned within the receiving groove. Limiting plates, fixedly connected to the hoist cage door, are located at both ends of the telescopic plate. In the initial state, the lower part of the telescopic plate is located outside the receiving groove, and the lower end face of the limiting plate is flush with the lower end face of the telescopic plate. The proximity switch is located at the top of the receiving groove. The metal detector is installed on the top surface of the telescopic plate and is adapted to the proximity switch. The actuator is connected to the hoist cage door and the proximity switch, and is used to open or close the hoist cage door.

[0006] Furthermore, the cage door includes an upper door body and a lower door body, and the telescopic plate is disposed at the bottom of the upper door body.

[0007] Furthermore, it also includes a first laser emitter, a first laser receiver, and a controller. The first laser emitter is embedded on the bottom surface of the telescopic plate, the first laser receiver is embedded on the upper end of the lower door body and is correspondingly arranged with the first laser emitter, and the controller is connected to the first laser receiver and the actuator, and is used to receive whether the first laser receiver has received a laser signal and send control commands to the actuator.

[0008] Furthermore, a telescopic rod is provided between the upper end of the telescopic plate and the top of the receiving groove. The telescopic rod includes a rod body, a sleeve, and a return spring. One end of the rod body is slidably inserted into the sleeve. The ends of the rod body and the sleeve that are far apart from each other are respectively connected to the top of the telescopic plate and the receiving groove. The return spring is sleeved on the outside of the rod body and the sleeve, and both ends of the return spring are respectively fixedly connected to the top of the telescopic plate and the receiving groove.

[0009] Furthermore, two telescopic plates are arranged side by side, and a telescopic rod is provided between each of the two telescopic plates and the top of the receiving groove. A proximity switch is provided above each of the two telescopic plates, a metal detector is provided on the top surface of each of the two telescopic plates, and the first laser emitter is provided on the bottom surface of each of the two telescopic plates.

[0010] Furthermore, the upper door body includes a base plate, an upper frame, and a mesh plate. The base plate is fixed to the bottom of the upper frame and has the receiving groove. The mesh plate is fixed to the upper frame.

[0011] Furthermore, vertical plates are fixed to the top surfaces of both telescopic plates, the two vertical plates are arranged opposite each other, and a second laser emitter and a second laser receiver are respectively and correspondingly arranged on the sides of the two vertical plates that are close to each other.

[0012] Furthermore, the upper frame has an inverted U-shaped structure, the bottom of the mesh plate has a through hole, the vertical plate slides through the bottom plate, and the second laser emitter and the second laser receiver are installed on the upper part of the vertical plate and located in the through hole.

[0013] Furthermore, protective covers are provided on both sides of the through hole.

[0014] Furthermore, the controller is connected to the second laser receiver and is used to receive whether the second laser receiver has received a laser signal and send control commands to the actuator.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The anti-pinch device for the hoist in this utility model has a receiving groove at the bottom of the cage door, with an opening at the lower end. A telescopic plate that can extend and retract vertically is installed inside the receiving groove, and a proximity switch is installed at the top of the receiving groove. A metal detector adapted to the proximity switch is installed on the top surface of the telescopic plate. When the cage door closes, it moves downwards. When it encounters an obstacle, the obstacle touches the telescopic plate, causing the telescopic plate to move upwards relative to the cage door. This brings the metal detector closer to the proximity switch. The proximity switch is connected to an actuator. When the metal detector approaches the proximity switch, the actuator moves the cage door upwards, thus achieving anti-pinch protection.

[0017] The anti-pinch device for the elevator in this utility model is provided with a first laser transmitter and a first laser receiver. When there is an obstruction between the upper and lower door bodies, the obstruction will block the laser emitted by the first laser transmitter, so that the first laser receiver cannot receive the laser emitted by the first laser transmitter. After the controller receives the signal that the first laser transmitter has not received the laser, it sends a control command to the actuator, so that the actuator drives the cage door to stop closing. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the anti-pinch device for the elevator in this utility model.

[0020] Figure 2 This is a partial structural cross-sectional view of the anti-pinch device for the elevator in this utility model.

[0021] Figure 3 This is a partial structural cross-sectional view of the elevator anti-pinch device in this utility model from another perspective.

[0022] In the diagram: 1. Telescopic plate; 2. Receiving slot; 3. Limiting plate; 4. Proximity switch; 5. Metal detector; 6. Upper door body; 601. Base plate; 602. Upper frame; 603. Mesh plate; 7. Lower door body; 8. First laser emitter; 9. First laser receiver; 10. Telescopic rod; 11. Vertical plate; 12. Second laser emitter; 13. Second laser receiver; 14. Through hole; 15. Protective cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-3As shown, the anti-pinch device for the elevator in this embodiment includes a telescopic plate 1, a proximity switch 4, a metal detector 5, and an actuator (not shown in the figure). The bottom of the cage door has a receiving groove 2 with its lower end communicating with the outside. The telescopic plate 1 is vertically extended and retracted within the receiving groove 2. Limiting plates 3, which are fixedly connected to the cage door, are provided at both ends of the telescopic plate 1. In the initial state, the lower part of the telescopic plate 1 is located outside the receiving groove 2, and the lower end face of the limiting plate 3 is flush with the lower end face of the telescopic plate 1. The proximity switch 4 is located at the top of the receiving groove 2. The metal detector 5 is installed on the top surface of the telescopic plate 1 and is adapted to the proximity switch 4. The actuator is connected to the cage door and the proximity switch 4, and is used to open or close the cage door.

[0025] In this embodiment, the anti-pinch device for the elevator has a receiving groove 2 at the bottom of the cage door. The receiving groove 2 has an opening at its lower end and a telescopic plate 1 that can be extended vertically is installed inside the receiving groove 2. A proximity switch 4 is installed at the top of the receiving groove 2, and a metal detector 5 adapted to the proximity switch 4 is installed on the top surface of the telescopic plate 1. When the cage door is closed, the cage door moves downward. When it encounters an obstacle, the obstacle touches the telescopic plate 1, causing the telescopic plate 1 to move upward relative to the cage door. This causes the metal detector 5 to approach the proximity switch 4. The proximity switch 4 is connected to the actuator. When the metal detector 5 approaches the proximity switch 4, the actuator drives the cage door to move upward, thereby achieving anti-pinch protection.

[0026] In this embodiment, a telescopic rod 10 is provided between the upper end of the telescopic plate 1 and the top of the receiving groove 2. The telescopic rod 10 includes a rod body, a sleeve and a return spring. One end of the rod body is slidably inserted into the sleeve. The ends of the rod body and the sleeve that are far apart from each other are respectively connected to the top of the telescopic plate 1 and the top of the receiving groove 2. The return spring is sleeved on the outside of the rod body and the sleeve, and the two ends of the return spring are respectively fixedly connected to the top of the telescopic plate 1 and the top of the receiving groove 2.

[0027] In this embodiment, the cage door includes an upper door body 6 and a lower door body 7. A telescopic plate 1 is disposed at the bottom of the upper door body 6. When the cage door is closed, the upper door body 6 moves downward and the lower door body 7 moves upward. Specifically, the upper door body 6 includes a bottom plate 601, an upper frame 602, and a mesh plate 603. The bottom plate 601 is fixed to the bottom of the upper frame 602. A receiving groove 2 is formed in the bottom plate 601 and has an opening at the bottom. The upper frame 602 has an inverted U-shaped structure, and the mesh plate 603 is fixed in the upper frame 602.

[0028] The elevator anti-pinch device in this embodiment also includes a first laser transmitter 8, a first laser receiver 9, and a controller (not shown in the figure). The first laser transmitter 8 is embedded on the bottom surface of the telescopic plate 1, and the first laser receiver 9 is embedded on the upper end of the lower door body 7 and is correspondingly set with the first laser transmitter 8. The controller is connected to the first laser receiver 9 and the actuator, and is used to receive whether the first laser receiver 9 has received a laser signal and send control commands to the actuator.

[0029] By setting a first laser emitter 8 and a first laser receiver 9, when there is an obstruction between the upper door body 6 and the lower door body 7, the obstruction will block the laser emitted by the first laser emitter 8, so that the first laser receiver 9 cannot receive the laser emitted by the first laser emitter 8. After the controller receives the signal that the first laser emitter 8 has not received the laser, it sends a control command to the actuator, so that the actuator drives the cage door to stop closing. This compensates for the defect that when the obstruction is thin and soft, the telescopic plate 1 cannot move upward relative to the upper door body 6, and the inverted cage door cannot stop closing or reopen.

[0030] In this embodiment, two telescopic plates 1 are arranged side by side. A telescopic rod 10 is provided between each of the two telescopic plates 1 and the top of the receiving slot 2. A proximity switch 4 is provided above each of the two telescopic plates 1. A metal detector 5 is provided on the top surface of each of the two telescopic plates 1. A first laser emitter 8 is provided on the bottom surface of each of the two telescopic plates 1. Two first laser receivers 9, corresponding to the two first laser emitters 8, are provided on the top surface of the lower door 7. By setting two telescopic plates 1, each with a corresponding proximity switch 4, first laser emitter 8, and first laser receiver 9, any obstruction beneath either telescopic plate 1 will cause the cage door to stop closing or reopen.

[0031] Preferably, vertical plates 11 are fixed to the top surfaces of both telescopic plates 1. The two vertical plates 11 are arranged opposite each other, and a second laser emitter 12 and a second laser receiver 13 are respectively and correspondingly arranged on the sides of the two vertical plates 11 that are close to each other. In this embodiment, a through hole 14 is opened at the bottom of the mesh plate 603, and the vertical plate 11 slides through the bottom plate 601. The second laser emitter 12 and the second laser receiver 13 are installed on the upper end of the vertical plate 11 and located in the through hole 14. Protective covers 15 are provided on both sides of the through hole 14. Preferably, the protective covers 15 are made of transparent material. The controller is connected to the second laser receiver 13 and is used to receive whether the second laser receiver 13 receives a laser signal and send control commands to the actuator. When the cage door is closed, there is an obstruction under one of the telescopic plates 1, and the obstruction does not block the laser emitted by the first laser emitter 8. When the obstruction comes into contact with the corresponding telescopic plate 1, the telescopic plate 1 moves upward relative to the upper door body 6, so that the second laser receiver 13 cannot receive the laser emitted by the second laser emitter 12. At this time, after the controller receives the signal that the second laser emitter 12 has not received the laser, it sends a control command to the actuator, causing the actuator to drive the cage door to reopen.

[0032] In this embodiment, the actuator that drives the cage door to open or close can be an electric, hydraulic or pneumatic drive unit, as long as it can drive the cage door to move. This embodiment of the present invention does not limit this.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lifting platform anti-pinch device, characterized in that, include: The telescopic plate (1) has a receiving groove (2) at the bottom of the cage door that is connected to the outside at the bottom. The telescopic plate (1) is installed in the receiving groove (2) for vertical extension. The telescopic plate (1) is provided with limiting plates (3) at both ends of the telescopic plate (1) that are fixedly connected to the cage door. In the initial state, the lower part of the telescopic plate (1) is located outside the receiving groove (2), and the lower end face of the limiting plate (3) is flush with the lower end face of the telescopic plate (1). A proximity switch (4) is disposed at the top of the receiving groove (2); Metal detector (5), which is installed on the top surface of the telescopic plate (1) and is adapted to the proximity switch (4); An actuator is connected to the cage door and a proximity switch (4) and is used to drive the cage door to open or close.

2. The elevator anti-pinch device according to claim 1, characterized in that, The cage door includes an upper door body (6) and a lower door body (7), and the telescopic plate (1) is located at the bottom of the upper door body (6).

3. The elevator anti-pinch device according to claim 2, characterized in that, It also includes a first laser emitter (8), a first laser receiver (9) and a controller. The first laser emitter (8) is embedded on the bottom surface of the telescopic plate (1). The first laser receiver (9) is embedded on the upper end of the lower door body (7) and is correspondingly set with the first laser emitter (8). The controller is connected to the first laser receiver (9) and the actuator, and is used to receive whether the first laser receiver (9) has received a laser signal and send control commands to the actuator.

4. The elevator anti-pinch device according to claim 3, characterized in that, A telescopic rod (10) is provided between the upper end of the telescopic plate (1) and the top of the receiving groove (2). The telescopic rod (10) includes a rod body, a sleeve and a return spring. One end of the rod body is slidably inserted into the sleeve. The ends of the rod body and the sleeve that are far apart from each other are respectively connected to the top of the telescopic plate (1) and the receiving groove (2). The return spring is sleeved on the outside of the rod body and the sleeve, and the two ends of the return spring are respectively fixedly connected to the top of the telescopic plate (1) and the receiving groove (2).

5. The elevator anti-pinch device according to claim 4, characterized in that, Two telescopic plates (1) are arranged side by side. A telescopic rod (10) is provided between the top of the two telescopic plates (1) and the top of the receiving groove (2). A proximity switch (4) is provided above the two telescopic plates (1). A metal detector (5) is provided on the top surface of the two telescopic plates (1). The first laser emitter (8) is provided on the bottom surface of the two telescopic plates (1).

6. The elevator anti-pinch device according to claim 5, characterized in that, The upper door body (6) includes a base plate (601), an upper frame (602) and a mesh plate (603). The base plate (601) is fixed to the bottom of the upper frame (602). The base plate (601) has the receiving groove (2). The mesh plate (603) is fixed inside the upper frame (602).

7. The elevator anti-pinch device according to claim 6, characterized in that, Both telescopic plates (1) have vertical plates (11) fixed on their top surfaces. The two vertical plates (11) are arranged opposite to each other, and a second laser emitter (12) and a second laser receiver (13) are respectively and correspondingly arranged on the sides of the two vertical plates (11) that are close to each other.

8. The elevator anti-pinch device according to claim 7, characterized in that, The upper frame (602) has an inverted U-shaped structure. The bottom of the mesh plate (603) has a through hole (14). The vertical plate (11) slides through the bottom plate (601). The second laser emitter (12) and the second laser receiver (13) are installed on the upper end of the vertical plate (11) and located in the through hole (14).

9. The elevator anti-pinch device according to claim 8, characterized in that, Protective covers (15) are provided on both sides of the through hole (14).

10. The elevator anti-pinch device according to claim 9, characterized in that, The controller is connected to the second laser receiver (13) and is used to receive whether the second laser receiver (13) has received a laser signal and send control commands to the actuator.

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