KR20220151389A - Hydraulic lift safety apparatus based on limited switch - Google Patents

Abstract

The present invention relates to a limited switch-based safety device for aerial work platforms. The limited switch-based safety device comprises: a limited switch (20) coupled to a handrail (12) of an aerial work platform (10) to form a sensing space, and detecting whether or not a safety ring connected to a worker is engaged in the sensing space; and a control means (40) triggering a change in the operation of a manipulator (15) of the aerial work platform (10) in response to a signal of the limited switch (20). As a result, if the worker fails to fasten the safety ring, the aerial work platform will not start, ensuring safety. Furthermore, even in the event of a safety accident or hazardous situation during work, the operation is maintained even when the safety ring is released, allowing for effective handling of emergency situations.

Description

High vehicle safety device based on limited switch {Hydraulic lift safety apparatus based on limited switch}

The present invention relates to a safety device for high-altitude vehicles, and more particularly, to a safety device for high-altitude vehicles based on a limited switch used in the process of working at heights with an operator on board.

The main risk factors related to high-altitude vehicles are accidents caused by being caught between the hull structure and the worktable when the worktable is raised or moved, collision with surrounding structures when moving to a place without descending after work at height, and fall due to momentary carelessness when working without fastening the safety ring. accidents, etc. Even if safety guidance/education is provided to prevent high-altitude vehicle accidents, workers have no choice but to rely on their own awareness during work.

Korean Utility Model Registration No. 0435485 (Prior Document 1) and Korean Unexamined Patent Publication No. 2009-0002074 (Prior Document 2) are known as prior art documents that can be referred to in relation to countermeasures against this.

In Prior Document 1, a boarding device is configured in a lift coupled to the main body to be moved by a cylinder for elevating and descending and a cylinder for forward and backward movement, and the boarding device includes a door that is opened and closed by a locking device; A first operating unit operated by hand on the side; It consists of; a second manipulation unit that is manipulated using the feet on the bottom surface. Therefore, it is expected that the effect of enhancing convenience and efficiency and securing safety according to work at high places is expected.

Prior Document 2 is a high-altitude vehicle for ship work equipped with a basket, the basket is installed with a safety bar forming a frame structure on top of the handrail; A second safety device for emergency stopping the operation of the device by detecting a structure and a body part of an operator approaching the operating unit is provided. Accordingly, an effect of preventing a collision with a structure and making an emergency stop to protect occupants is expected.

However, prior document 1 is not suitable for shipbuilding sites and has insufficient applicability, and prior document 2 has legal problems because the safety bar protrudes upward.

Korean Registered Utility Model Publication No. 0435485 "Vehicle Device for High-Vehicle" (Public Date: 2007.01.25.) Korean Patent Laid-open Publication No. 2009-0002074 "Safety device for aerial vehicle for ship work" (Publication date: 2009.03.04.)

The purpose of the present invention for improving the above conventional problems is a limited switch capable of coping with dangerous situations while preventing safety accidents by applying safety rings in conjunction based on a structure suitable for application to shipbuilding sites. It is to provide a safety device for high-altitude vehicles based on

In order to achieve the above object, the present invention is a high vehicle safety device based on a limited switch: coupled to a handrail of a high vehicle to form a sensing space, detecting whether a safety ring connected to an operator is caught in the sensing space a limited switch that does; and a control means for inducing an operation change of the manipulator of the high-altitude vehicle in response to the signal of the limited switch.

According to a detailed configuration of the present invention, the limited switch is characterized in that a sensing space is formed with a pair of opposing fixed rods and a pair of movable rods, and a motion of a sensing plate disposed in the sensing space is sensed by a sensing unit.

According to the detailed configuration of the present invention, the fixed base, the movable base, and the sensing plate are formed of an aluminum alloy.

As a modified example of the present invention, the limited switch is characterized in that it further includes at least one of a human body detector and a sound detector.

According to the detailed configuration of the present invention, the control means communicates with the manipulator through the wireless communication unit and the driving unit mounted on the limit switch, stops the start of the aerial vehicle when there is no signal from the detection plate under normal conditions, and stops the operation of the detection plate under emergency conditions. It is characterized in that the operation of the aerial vehicle is maintained regardless of the signal of.

As described above, according to the present invention, if the worker does not fasten the safety ring by himself, the high-altitude vehicle does not start, ensuring safety, and in the event of a safety accident or dangerous situation during work, the operation is maintained even when the safety ring is released to cope with emergency situations. has the effect of

1 is a configuration diagram showing a state in which an apparatus according to the present invention is applied
Figure 2 is a configuration diagram showing the main parts of the device according to the present invention
Figure 3 is a block diagram showing the control circuit of the device according to the present invention

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

The present invention proposes a safety device for high vehicles based on a limited switch. Devices that consider the safety of workers on board the high vehicle 10 are targeted, but are not necessarily limited to the high vehicle 10. A limited switch is not limited to the narrow meaning of a well-known term and may be interpreted in a broad sense including other configurations related thereto.

According to the present invention, the limited switch 20 coupled to the handrail 12 of the high vehicle 10 to form a sensing space has a structure in which the safety ring connected to the operator detects whether or not the sensing space is caught.

Referring to FIG. 1, it shows a state in which the limited switch 20 is installed on the handrail 12 on the work table 11 of the aerial vehicle 10. The aerial vehicle 10 includes a work table 11, a handrail 12, and an access door 13, and is equipped with a manipulator 15 for controlling starting, running, and working at heights of the vehicle. The workbench 11 includes a handrail 12 on four sides and an access door 13 that can be opened and closed on one side. The limited switch 20 is fixed to the round bar of the handrail 12 and forms a sensing space in which the safety ring SH can be hung. A known safety ring (SH) is a hook structure and is connected to a worker by a rope.

According to the detailed configuration of the present invention, the limited switch 20 forms a sensing space with a pair of opposing fixed rods 21 and a pair of movable rods 22, and includes a sensing plate 25 disposed in the sensing space. Characterized in that the motion of the sensing unit 27 is detected.

Referring to FIGS. 1 and 2 , a fixed base 21 , a movable base 22 , a sensing plate 25 , a sensing unit 27 and the like constituting the limited switch 20 are shown. The limited switch 20 is provided with a pair of fixtures 21 on one surface based on a body having a substantially hexahedral structure. A movable table 22 is detachably fixed to each fixing table 21 using a fastener 23 . The fixed base 21 and the movable base 22 have grooves capable of tightly gripping the handrail 12 . A sensing space is formed between the pair of fixtures 21, and the sensing plate 25 is rotatably mounted in the sensing space. A sensing unit 27 for detecting the rotation of the sensing plate 25 is configured inside the body of the limited switch 20 .

According to the detailed configuration of the present invention, the fixing base 21, the movable base 22, and the sensing plate 25 are formed of an aluminum alloy.

In general, the environment in which the high vehicle 10 is used in a shipyard is set to a temperature condition of ??25 ℃ to 80 ℃ and a humidity condition of 45 to 85% RH, while having a lot of dust, such as a painting shop. If the body, as well as the fixing table 21, the movable table 22, and the sensing plate 25 are made of aluminum alloy, lightness and durability in harsh environments can be guaranteed. It is suitable to withstand the impact generated on the fixed base 21, the movable base 22, and the sensing plate 25 in the process of a worker hooking or releasing the safety hook to the limit switch 20.

As a modified example of the present invention, the limited switch (20) is characterized in that it further includes at least one of a human body detector (30) and a sound detector (35).

Referring to FIGS. 1 and 3 , a human body detector 30 and a sound detector 35 installed on a work table 11 are shown. The human body detector 30 and the human body detector 30 are preferably mounted on the limited switch 20, but may be installed in other areas of the handrail 12 or the workbench 11. For the human body detector 30, an ultrasonic method is preferred in consideration of poor environmental conditions including dust. The sound detector 35 is a microphone and is concealed so as not to be exposed to the outside. The human body detector 30 and the sound detector 35 detect a worker's jamming or fall, fire, or other emergency conditions that make it difficult to work.

In addition, according to the present invention, the control means 40 forms a structure in which the operation of the manipulator 15 of the high vehicle 10 is changed in response to the signal of the limit switch 20.

1 and 3, a state in which the control means 40 is linked to the manipulator 15, the limited switch 20, and the like is shown. The control means 40 includes wires connecting the limit switch 20, the human body detector 30, and the sound detector 35 to the manipulator 15. In this case, the manipulator 15 executes the set control algorithm. In addition, the control means 40 may include a separate controller (not shown) mounted on the limited switch 20 .

According to the detailed configuration of the present invention, the control means 40 communicates with the manipulator 15 through the wireless communication unit 41 and the driving unit 43 mounted on the limit switch 20, and under normal conditions, the sensing plate 25 If there is no signal of ), the start of the aerial vehicle 10 is stopped, and the operation of the aerial vehicle 10 is maintained regardless of the signal of the sensing plate 25 in an emergency condition.

The control means 40 may additionally constitute a controller equipped with a wireless communication unit 41 and a driving unit 43. The controller transmits signals from the sensing unit 27, the human body detector 30, and the sound detector 35 to the manipulator 15 through the wireless communication unit 41. The driving unit 43 performs an operation of electrically opening and closing the access door 13 of the work table 11 in addition to audibly and visually alerting an emergency condition. Of course, the controller can determine a normal condition and an emergency condition in conjunction with the manipulator 15 . Normally, only when the operator hangs the safety ring on the limit switch 20, the start of the aerial vehicle 10 is maintained and the work proceeds under normal conditions. If the set emergency condition is input, even if the safety ring is removed from the limit switch 20, the start and operation of the aerial vehicle 10 are maintained.

The present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such variations or modifications should fall within the scope of the claims of the present invention.

10: aerial vehicle 11: work table
12: handrail 13: entrance door
15: actuator 20: limited switch
21: fixed table 22: movable table
23: fastening part 25: detection plate
27: sensing unit 30: human body detector
35: sound detector 40: control means
41: wireless communication unit 43: driving unit
45: power supply

Claims (5)

In height vehicle safety devices based on limited switches:
A limited switch 20 coupled to the handrail 12 of the high vehicle 10 to form a sensing space and detecting whether a safety ring connected to the operator is caught in the sensing space; and
A control means (40) for causing an operation change of the manipulator (15) of the aerial vehicle (10) in response to the signal of the limited switch (20); The method of claim 1,
The limited switch 20 forms a sensing space with a pair of opposing fixing rods 21 and a pair of movable rods 22, and the motion of the sensing plate 25 disposed in the sensing space is detected by the sensing unit 27. A limited switch-based high-altitude vehicle safety device characterized in that it is detected by. The method of claim 2,
The high vehicle safety device based on a limited switch, characterized in that the fixed base (21), the movable base (22), and the sensing plate (25) are formed of an aluminum alloy. The method of claim 1,
The limited switch (20) is a limited switch-based high vehicle safety device, characterized in that it further comprises at least one of a human body detector (30) and a sound detector (35). The method of claim 1,
The control means 40 communicates with the manipulator 15 through the wireless communication unit 41 and the driving unit 43 mounted on the limit switch 20, and if there is no signal from the sensing plate 25 under normal conditions, the height difference ( 10) Stops the start and maintains the operation of the aerial vehicle 10 regardless of the signal of the detection plate 25 in an emergency condition.

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