Anti-pinch safety device for lifting platform

Abstract

The utility model relates to the technical field of safety protection of high-altitude operation equipment, and discloses an anti-pinch safety device for a lifting platform, which is characterized in that a trigger rod is vertically arranged at the top of the lifting platform, and the outer wall of the trigger rod is also connected with a trigger rod fastening bolt; the trigger pressing sheet is positioned at the top of the cavity of the mounting shell; the transmitter protection box is arranged in the cavity of the mounting shell, a transmitter chip module is mounted in the transmitter protection box, and the transmitter chip module comprises a trigger switch and a transmitting antenna; an LED indicating lamp and a buzzer are arranged on the protective shell to form a sound-light alarm structure; and the receiver host is independently arranged on the lifting platform. Through the arrangement of the trigger switch with a magnetic induction mechanism, higher sensitivity and longer service life are achieved, potential safety hazards caused by deformation or breakage of mechanical parts can be effectively avoided, an automatic locking module is integrated, and a lifting power source of the lifting table can be rapidly cut off.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for high-altitude work equipment, specifically to an anti-pinch safety device for a lifting platform. Background Technology

[0002] In high-altitude operations, the safety of lifting platforms, as commonly used work equipment, is of paramount importance. Lifting platforms often pose a safety hazard of pinching and injuring operators, easily leading to accidents. To effectively prevent such accidents, protective measures are usually required.

[0003] However, traditional protective measures mostly use mechanical limit switches. Frequent collisions can easily cause mechanical parts to deform or break, resulting in a short service life and the need for frequent replacement. The physical action of the mechanical contacts is delayed, making it impossible to cut off the power in time, and the risk of pinching injury still exists. Furthermore, manual reset is required after shutdown, and there is a lack of mandatory secondary operation confirmation mechanism.

[0004] Based on this, the present invention designs an anti-pinch safety device for lifting platforms to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a safety device for preventing pinching of a lifting platform, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lifting platform anti-pinch safety device, comprising:

[0007] A trigger rod is vertically installed on the top of the lifting platform, and a trigger rod fastening bolt is also connected to the outer wall of the trigger rod.

[0008] The mounting housing is fitted onto the trigger rod and connected by the trigger rod fastening bolts. The mounting housing is also provided with guardrail mounting screw holes.

[0009] A trigger plate, located at the top of the cavity of the mounting housing, is used to trigger a signal when pressure is applied;

[0010] A transmitter protection box is disposed within the cavity of the mounting housing. A transmitter chip module is installed inside the transmitter protection box. The transmitter chip module includes a trigger switch and a transmitting antenna.

[0011] A protective housing covers the opening of the mounting housing cavity. The protective housing is equipped with an LED indicator and a buzzer, forming an audible and visual alarm structure.

[0012] The receiver host is independently installed on the lifting platform. The receiver host includes a receiving antenna, a female connector for the rising solenoid valve, and a male connector for the rising wire harness, which are used for wireless communication with the transmitting antenna.

[0013] Preferably, the trigger switch integrates a magnetic induction mechanism to detect contact with an obstacle above, replacing a mechanical limit switch.

[0014] Preferably, the receiver host is electrically connected to an automatic locking module, which cuts off the lifting power of the lifting platform through the female plug of the lifting solenoid valve when the magnetic induction mechanism is triggered or the sensor power is insufficient.

[0015] Preferably, the trigger rod and the mounting housing adopt an adjustable connection structure, and the guardrail can be adapted to different specifications of lifting platform guardrails through the guardrail mounting screw holes.

[0016] Preferably, the transmitting antenna uses a multi-band communication protocol.

[0017] Preferably, the LED indicator of the protective casing is a red flashing light, the buzzer is a high-decibel alarm, and the triggering conditions include: the contact with the obstacle lasts for more than 0.5 seconds, or the transmitter chip module detects that the battery level is lower than a preset threshold.

[0018] Preferably, the male connector of the receiver host's rising harness is connected to the original circuit of the lifting platform, and the female connector of the rising solenoid valve has a built-in fuse protection mechanism.

[0019] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0020] I. This utility model incorporates a trigger switch with a magnetic induction mechanism. When the lifting platform rises and touches an obstacle, it forces the trigger rod to move downwards, causing the trigger plate to move synchronously downwards and press the trigger switch in the transmitter chip module. This disconnects the transmission circuit and stops the wireless signal transmission. After the receiver host does not receive a signal, its internal relay disconnects. Compared with traditional mechanical limit switches, this design offers higher sensitivity and a longer service life, effectively preventing safety hazards caused by deformation or breakage of mechanical parts. The integrated automatic locking module can quickly cut off the lifting platform's power supply when the magnetic induction mechanism is triggered or the sensor power is insufficient, thus effectively preventing pinching accidents and improving operational safety.

[0021] Second, the trigger rod and the mounting housing of this utility model adopt an adjustable connection structure, which can be adapted to different specifications of lifting platform guardrails, improving the versatility and practicality of the device. The transmitting antenna adopts a multi-band communication protocol, which can ensure the stability and reliability of wireless communication and avoid false alarms or missed alarms caused by signal interference. The protective housing is equipped with a red flashing LED indicator and a high-decibel buzzer, which can promptly issue an audible and visual alarm under trigger conditions to remind operators to pay attention to safety, further improving the safety of operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the receiver host in this utility model.

[0024] The components include: 1. Trigger rod; 2. Trigger rod fastening bolt; 3. Mounting housing; 4. Guardrail mounting screw holes; 5. Trigger pressure plate; 6. Transmitter protection box; 7. Transmitter chip module; 8. Trigger switch; 9. Transmitting antenna; 10. Protective housing; 11. LED indicator; 12. Buzzer; 13. Receiver main unit; 14. Receiving antenna; 15. Female connector for rising solenoid valve; 16. Male connector for rising wire harness. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1 and Figure 2 This utility model embodiment provides a lifting platform anti-pinch safety device, including:

[0027] Trigger rod 1 is vertically installed on the top of the lifting platform, and trigger rod fastening bolt 2 is also connected to the outer wall of trigger rod 1;

[0028] The mounting housing 3 is fitted onto the trigger rod 1 and connected by the trigger rod fastening bolt 2. The mounting housing 3 is also provided with guardrail mounting screw holes 4.

[0029] The trigger plate 5 is located at the top of the cavity of the mounting housing 3 and is used to trigger a signal when pressure is applied.

[0030] The transmitter protection box 6 is located inside the cavity of the mounting housing 3. The transmitter chip module 7 is installed inside the transmitter protection box 6. The transmitter chip module 7 includes a trigger switch 8 and a transmitting antenna 9.

[0031] A protective housing 10 covers the opening of the cavity of the mounting housing 3. The protective housing 10 is equipped with an LED indicator 11 and a buzzer 12, forming an audible and visual alarm structure.

[0032] The receiver host 13 is independently installed on the lifting platform. The receiver host 13 includes a receiving antenna 14, a female connector 15 for the rising solenoid valve, and a male connector 16 for the rising wire harness, which are used for wireless communication with the transmitting antenna 9.

[0033] In practical application, the device is installed on the guardrail of the aerial work platform and secured with screws through the mounting screw holes 4 to ensure a stable connection between the mounting housing 3 and the lifting platform structure. The vertical height of the trigger rod 1 is adjusted so that its top is 30-50 cm above the operator's head. Then, the trigger rod fastening bolt 2 is tightened to fix the position. When the lifting platform rises to the point where the top of the trigger rod 1 contacts an obstacle above, the pressure exerted by the obstacle forces the trigger rod 1 to move downward. The downward movement of the trigger rod 1 causes the trigger pressure plate 5 inside the mounting housing 3 to move downward synchronously. When pressed down to the limit position, press the trigger switch 8 in the transmitter chip module 7. After the trigger switch 8 is pressed, the transmission circuit is disconnected, and the transmitter chip module 7 stops sending wireless signals to the receiver host 13 through the transmitting antenna 9. When the receiving antenna 14 of the receiver host 13 does not detect a signal, its internal relay immediately disconnects, cuts off the lifting power of the lifting platform through the lifting solenoid valve female plug 15, forces the equipment to stop rising, and simultaneously triggers an audible and visual alarm. The LED indicator 11 on the protective housing 10 turns to a constant state, and the buzzer 12 sounds continuously to warn the operator.

[0034] In this embodiment, when the lifting platform descends and the top of the trigger rod 1 disengages from the obstacle, the trigger rod 1 moves upward synchronously. The upward movement of the trigger rod 1 causes the trigger pressure plate 5 to move upward synchronously, releasing the pressure on the trigger switch 8. After the trigger switch 8 is released, the transmitting circuit closes again, and the transmitter chip module 7 continuously sends wireless signals to the receiver host 13 through the transmitting antenna 9. After the receiving antenna 14 of the receiver host 13 detects a valid signal, its internal relay closes, restoring the lifting platform's power supply through the male connector 16 of the rising harness. The audible and visual alarm is deactivated, the LED indicator 11 goes out, the buzzer 12 stops sounding, and the equipment can rise normally.

[0035] In one embodiment, the transmitting and receiving devices are equipped with timed heartbeat monitoring capabilities. They can monitor heartbeats within a specified time. If a heartbeat signal is not detected within this time, the system will automatically block the device's ascent operation, thereby ensuring that the device remains stable and safe during operation and avoiding risks caused by device failure or loss of connection.

[0036] Please see Figure 1 In a preferred embodiment of this utility model, the trigger switch 8 integrates a magnetic induction mechanism to detect contact with an obstacle above, replacing the mechanical limit switch.

[0037] In practical applications, the trigger switch 8 integrates a magnetic induction mechanism, which can detect the contact between the device and the obstacle above without contact, replacing the traditional mechanical switch and thus extending the service life of the equipment.

[0038] Please see Figure 2 In another preferred embodiment of this utility model, the receiver host 13 is electrically connected to an automatic locking module. When the magnetic induction mechanism is triggered or the sensor power is insufficient, the lifting power of the lifting platform is cut off through the lifting solenoid valve female plug 15.

[0039] In this embodiment, when the magnetic induction mechanism is triggered or the sensor power is insufficient, the automatic locking module can immediately cut off the power to prevent pinching accidents. It can also be linked with the sound and light alarm structure to provide real-time warnings and reduce the risk of secondary injury.

[0040] Please see Figure 1 In another preferred embodiment of this utility model, the trigger rod 1 and the mounting housing 3 adopt an adjustable connection structure, and the guardrail of different specifications of the lifting platform guardrail is adapted through the guardrail mounting screw hole 4.

[0041] In this embodiment, the device is fastened with screws through the guardrail mounting screw holes 4. The adjustable mounting housing 3 ensures a stable connection between the mounting housing 3 and the lifting platform structure, making it easy to adjust the vertical height of the trigger rod 1, adapting to different lifting platform specifications, and improving versatility.

[0042] Please see Figure 1 As another preferred embodiment of this utility model, the transmitting antenna 9 adopts a multi-band communication protocol. Furthermore, the LED indicator 11 of the protective housing 10 is a red flashing light, the buzzer 12 is a high-decibel alarm, and the triggering conditions include: the contact with the obstacle lasts for more than 0.5 seconds, or the transmitter chip module 7 detects that the power is lower than a preset threshold.

[0043] In this embodiment, the transmitting antenna 9 adopts a multi-band communication protocol, such as Bluetooth or ZigBee. If the current frequency band is interfered with, it automatically switches to the backup frequency band to maintain signal stability, avoiding false alarms or missed alarms caused by signal interference. When the transmitter chip module 7 detects that the power is lower than the preset threshold, it actively disconnects the transmitting circuit, triggers the receiver host 13 to forcibly cut off the power of the lifting platform, and at the same time, the LED indicator 11 flashes to indicate the low power status.

[0044] Please see Figure 1 In another preferred embodiment of this utility model, the male connector 16 of the rising harness of the receiver host 13 is connected to the original circuit of the lifting platform, and the female connector 15 of the rising solenoid valve has a built-in fuse protection mechanism.

[0045] In this embodiment, the built-in fuse protection mechanism of the rising solenoid valve female plug 15 can quickly cut off the circuit when the current is abnormal, preventing equipment damage caused by short circuit or overload, further improving the safety performance of the device, thereby avoiding safety accidents caused by electrical faults and providing safety protection for operators.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety device for preventing pinching of a lifting platform, characterized in that, include: A trigger rod (1) is vertically installed on the top of the lifting platform, and a trigger rod fastening bolt (2) is also connected to the outer wall of the trigger rod (1); The mounting housing (3) is fitted onto the trigger rod (1) and connected by the trigger rod fastening bolt (2). The mounting housing (3) is also provided with guardrail mounting screw holes (4). The trigger plate (5) is located at the top of the cavity of the mounting housing (3) and is used to trigger a signal when pressure is applied. A transmitter protection box (6) is disposed in the cavity of the mounting housing (3). A transmitter chip module (7) is installed inside the transmitter protection box (6). The transmitter chip module (7) includes a trigger switch (8) and a transmitting antenna (9). A protective housing (10) covers the opening of the cavity of the mounting housing (3). The protective housing (10) is provided with an LED indicator (11) and a buzzer (12) to form an audible and visual alarm structure. The receiver host (13) is independently set on the lifting platform. The receiver host (13) includes a receiving antenna (14), a female connector for the rising solenoid valve (15), and a male connector for the rising wire harness (16), which are used for wireless communication with the transmitting antenna (9).

2. The anti-pinch safety device for a lifting platform according to claim 1, characterized in that: The trigger switch (8) integrates a magnetic induction mechanism to detect contact with an obstacle above, replacing the mechanical limit switch.

3. The anti-pinch safety device for a lifting platform according to claim 2, characterized in that: The receiver host (13) is electrically connected to an automatic locking module. When the magnetic induction mechanism is triggered or the sensor power is insufficient, the lifting power of the lifting platform is cut off through the lifting solenoid valve female plug (15).

4. The anti-pinch safety device for a lifting platform according to claim 1, characterized in that: The trigger rod (1) and the mounting housing (3) adopt an adjustable connection structure, and the guardrails of different specifications can be adapted to the guardrails of the lifting platform through the guardrail mounting screw holes (4).

5. The anti-pinch safety device for a lifting platform according to claim 1, characterized in that: The transmitting antenna (9) adopts a multi-band communication protocol.

6. The anti-pinch safety device for a lifting platform according to claim 1, characterized in that: The LED indicator (11) of the protective shell (10) is a red flashing light, and the buzzer (12) is a high-decibel alarm. The triggering conditions include: the contact with the obstacle lasts for more than 0.5 seconds, or the transmitter chip module (7) detects that the power is lower than a preset threshold.

7. The anti-pinch safety device for a lifting platform according to claim 1, characterized in that: The male connector (16) of the receiver host (13) is connected to the original circuit of the lifting platform, and the female connector (15) of the lifting solenoid valve has a built-in fuse protection mechanism.

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