Scissor type aerial work platform operation safety interlocking protection device

Abstract

The utility model discloses a scissor-type aerial work platform operation safety interlocking protection device which comprises a detection host, a reflector assembly and an aerial work platform, and the detection host is arranged on a short-edge protective fence on one side of the aerial work platform. The reflector assembly is arranged on a short-edge protective fence on the other side of the aerial work platform; an infrared sensor is arranged on the detection host; the detection host is electrically connected with a controller of the aerial work platform. The safety protection device can effectively avoid the injury to workers caused by the fact that the workers stand on the overhead car and cannot accurately control the lifting to reach the top of a building, overcomes the defects of the height limiter, does not have any influence on the operation and construction of the workers, and can protect the overhead car from being damaged after the safety protection device is applied to the overhead car. Installation of an existing height limiting stopper can be abandoned.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety protection devices for lifting machinery, and in particular relates to a safety interlocking protection device for an operation of a scissor-type aerial work platform. Background Art

[0002] Scissor-type aerial work platforms (hereinafter referred to as aerial work platforms or lifting equipment) are movable, elevating work platforms that have rapidly gained widespread use on construction sites due to their high efficiency, safety, and convenience. With the increasing number of applications and the growing number of equipment, aerial work platform accidents have also become increasingly common. Aerial work platform accidents primarily include equipment damage caused by vehicle overturning, casualties caused by people falling from heights, and crushing injuries caused by aerial work platforms hitting the top of buildings. Injuries caused by aerial work platforms hitting the top of buildings are particularly common.

[0003] In order to solve the problem of injuries to personnel caused by aerial vehicles rushing onto the top of buildings, construction sites currently install height limiters to prevent aerial vehicles from rushing onto the top of buildings. This measure can indeed play a protective role when the height limiter is in normal working condition. However, many occasions on existing construction sites are relatively complex, and the installed height limiter is often restricted in use due to on-site environmental factors. Operators will remove the height limiter to complete their work, causing the device to fail. Furthermore, due to the different heights of buildings, the height limiter needs to frequently adjust the height of the top rod, but operators often do not take into account to adjust the height of the height limiter top rod, which causes the height limiter to fail.

[0004] In order to completely solve the pain points of this industry, a personnel safety protection device needs to be developed for aerial platforms based on operational requirements, equipment conditions, and operator habits. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model invents a scissor-type aerial work platform operation safety interlocking protection device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A scissor-type aerial work platform operation safety interlocking protection device includes a detection host, a reflector assembly and an aerial work platform. The detection host is arranged on the short side guardrail on one side of the aerial work platform, and the reflector assembly is arranged on the short side guardrail on the other side of the aerial work platform; the detection host is provided with an infrared sensor; and the detection host is electrically connected to the controller of the aerial work platform.

[0008] The utility model can effectively prevent workers standing on the aerial vehicle from hitting the top of the building due to the inability to accurately control the ascent, which causes injuries to personnel, makes up for the defects of the height limiter itself, and will not have any impact on the operation and construction of the workers. After the aerial vehicle is equipped with this protection device, the installation of the existing height limiter can be abandoned.

[0009] Furthermore, the infrared sensor of the detection host emits at least two infrared light curtains, which detect when the aerial work platform workers stand up or their heads are higher than the guardrail during the ascent and movement of the aerial work platform, thereby determining whether the aerial work platform has stopped operating.

[0010] Furthermore, the detection host forms an electrical interlock with the emergency stop power supply circuit of the aerial work platform, thereby achieving the ability to accurately control the cutting off of the ascending control power supply of the aerial work platform.

[0011] Furthermore, the connection method between the detection host and the controller of the aerial work platform is an aviation connector plug-in method or a wire connection method. The aviation connector plug-in method is to use an aviation connector to directly connect to the controller of the aerial work platform, and the wire connection method is to connect the control line of the detection host with the control line of the controller of the aerial work platform.

[0012] Furthermore, the detection host and the reflector assembly are installed at the center of the short side guardrail, and the detection host is installed on the short side guardrail at the non-retractable end.

[0013] The advantages of the present invention are that: without destroying or changing any structure of the aerial work platform, the present invention installs a detection host (infrared matrix light curtain sensor) on the guardrail (non-retractable end) of the aerial work platform, and the installation height of the detection host is flush with the height of the guardrail. The light of the infrared matrix light curtain passes through the entire aerial work platform guardrail. When a person stands above the height of the guardrail, the human body will block one or more infrared rays, thereby triggering the infrared sensor. When a person squats and the height of the human body is lower than the height of the guardrail, the infrared light passes through without being triggered. Whether the aerial work platform operation is interrupted is determined by whether the infrared sensor is triggered. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This utility model is a three-dimensional scissor-type aerial work platform operation safety interlocking protection device Figure 1 ;

[0015] Figure 2 This utility model is a three-dimensional scissor-type aerial work platform operation safety interlocking protection device Figure 2 . DETAILED DESCRIPTION

[0016] The following is a detailed description of the present invention with reference to the accompanying drawings:

[0017] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “upper”, “lower”, “top”, “bottom”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, they cannot be understood as a limitation on the present invention.

[0018] like Figure 1-2 As shown, a scissor-type aerial work platform operation safety interlocking protection device includes a detection host 1, a reflector assembly 2, and an aerial work platform 3. The detection host 1 is positioned on the short side guardrail of one side of the aerial work platform 3, centered at the non-retractable end, and the reflector assembly 2 is positioned on the short side guardrail of the other side of the aerial work platform 3, centered. The detection host 1 is provided with an infrared sensor, which is mounted opposite the light-emitting panel assembly 2 and at the same height. The infrared light emitted by the infrared sensor can be received and reflected by the reflector assembly 2. The detection host 1 is electrically connected to the controller of the aerial work platform 3, and whether the control of the aerial work platform 3 is interrupted is controlled by whether the infrared sensor is triggered. The detection host 1 forms an electrical interlock with the emergency stop power supply circuit of the aerial work platform 3, and the control of the aerial vehicle's lifting power supply is achieved through a simple connection. The connection method between the detection host 1 and the controller of the aerial work platform 3 is an aviation connector plug-in method or a wire connection method. The aviation connector plug-in method is to use a customized adapter aviation plug, and plug the male head (with pin) of the adapter aviation plug into the operating handle socket of the controller of the aerial work platform, and the female head (hole) of the adapter aviation plug is connected to the plug of the control handle of the controller of the aerial work platform; the wire connection method is to break the outer skin of the operating handle socket harness (non-removable operating handle wire) of the controller on the aerial work platform at an appropriate position, wrap the red wire of the detection host output line around the positive wire, wrap the black wire of the detection host output line around the negative wire, cut off any one wire of the operating handle socket harness except the positive and negative wires, and connect the white and green wires of the detection host output line to the two ends of the wires just cut off.

[0019] The detection host 1 has dimensions of 265 x 38 x 45 mm (length, width, and height) and a metal housing with an electrophoretic spray-coated surface finish. It houses two infrared matrix light curtain sensors with a window for the light curtains to penetrate. The infrared matrix light curtain sensors are equipped with distance and accuracy adjustment buttons. The detection host also houses a detection mainboard PCBA, which receives sensor signals and controls the aerial platform's electrical circuits.

[0020] The fundamental principle behind this device's control of the scissor-type aerial platform is that a relay within the main unit controls the aerial platform's emergency stop power supply circuit. This means that the device's relay contacts are connected in series to the control circuit from the emergency stop output to the aerial platform's main relay, effectively limiting the aerial platform's functionality when a person is standing and operating the platform. Furthermore, the device's power supply is obtained locally, via wiring to the operating handle's socket (not on the operating handle). This method is simple and reliable, eliminating the need for wiring.

[0021] The principle of the present utility model: The safety interlock protection device controls whether the aerial work platform is allowed to rise or move according to whether the infrared sensor is triggered or not. When the infrared sensor is triggered, the aerial work platform is not allowed to rise or move; when the infrared sensor is not triggered, the aerial work platform is allowed to rise or move. It can be seen that as long as the height of the personnel does not exceed the height of the guardrail, the aerial work platform can rise or move; when the height of the personnel exceeds the height of the guardrail, the device will immediately cut off the aerial work platform's rising and moving power control circuit, and will not allow the platform to rise or the aerial work platform to move. As long as the height of the personnel does not exceed the height of the guardrail, even if the aerial work platform rushes to the top of the building, the guardrail will only be damaged, and the operating personnel will be guaranteed to be safe.

[0022] Although the above describes and illustrates the specific embodiments of the present invention in detail, it should be noted that various changes and modifications can be made to the above embodiments without departing from the spirit of the present invention and the scope of the appended claims.

Claims

1. A scissor-type aerial work platform operation safety interlocking protection device, characterized in that: The invention comprises a detection host (1), a reflector assembly (2) and an aerial work platform (3), wherein the detection host (1) is arranged on a short side guardrail on one side of the aerial work platform (3), and the reflector assembly (2) is arranged on a short side guardrail on the other side of the aerial work platform (3); an infrared sensor is arranged on the detection host (1); and the detection host (1) is electrically connected to a controller of the aerial work platform (3).

2. A scissor-type aerial work platform operation safety interlocking protection device according to claim 1, characterized in that: The infrared sensor of the detection host (1) emits at least two infrared light curtains.

3. A scissor-type aerial work platform operation safety interlocking protection device according to claim 2, characterized in that: The detection host (1) and the emergency stop power supply circuit of the aerial work platform (3) form an electrical interlock.

4. A scissor-type aerial work platform operation safety interlocking protection device according to claim 3, characterized in that: The detection host (1) and the controller of the aerial work platform (3) are connected in an aviation connector plug-in manner or a wire connection manner.

5. A scissor-type aerial work platform operation safety interlocking protection device according to claim 4, characterized in that: The detection host (1) and the reflector assembly (2) are installed at the center of the short side guardrail, and the detection host (1) is installed on the short side guardrail at the non-retractable end.

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