KR102333672B1 - Upsetting prevention system for travelling crane - Google Patents

Abstract

An embodiment of the present invention relates to a fall prevention system for a mobile crane using an outrigger, and the technical problem to be solved is to detect the outrigger withdrawal state and make a warning sound when the outrigger is not pulled out when the boom is raised for work to be able to send it.
To this end, an embodiment of the present invention is a sensor unit for detecting the withdrawal state information of the outrigger mounted on the mobile crane; And having a communication interface and an alarm generating program therein, the fall prevention system of a mobile crane using an outrigger including a main processor for outputting the outrigger withdrawal status information or alarm information detected by the sensor unit to the outside. start

Description

Tipping prevention system for mobile cranes using outriggers

One embodiment of the present invention relates to a system for preventing a mobile crane from falling through an outrigger non-expansion alarm.

Recently, a product equipped with a moment limit device and the like has been released in a cargo crane or the like, but this is a form of limiting only the boom angle according to the hoist load weight.

This means that the movement of the center of gravity of the high-place work vehicle cannot be detected and reflected due to the safety of the ground supported by the outrigger and the wind load caused by the wind, which is an environmental factor during operation.

Due to this, rollover accidents are constantly occurring during the work of cargo cranes or high-place work vehicles, resulting in noble lives and material damage, causing social costs.

Laid-Open Patent Publication No. 10-2018-0110822 (published date: October 11, 2018)

An embodiment of the present invention provides a system for preventing the falling of a mobile crane that detects the outrigger withdrawal state and sends out a warning sound when the outrigger is not pulled out when the boom is raised for work.

The falling prevention system of the mobile crane according to an embodiment of the present invention includes: a sensor unit for detecting the withdrawal state information of the outrigger mounted on the mobile crane; and a main processor having a communication interface and an alarm generating program therein and outputting outrigger withdrawal state information or alarm information detected by the sensor unit to the outside.

The sensor unit includes a slide sensor for detecting a length of the outrigger withdrawn; And a proximity sensor for detecting the boom seated state of the mobile crane; includes, wherein the main processor is a banjo key, non-drawing state, boom seated by executing a preset alarm generating program based on the detection information by the sensor unit The state information may be calculated, and the alarm information may be output through the alarm generator based on the calculated information.

In addition, the falling prevention system of the present mobile crane further includes a display unit for displaying the withdrawal status information or alarm information of the outrigger, and the display unit includes length information of the front left and right sides and the rear left and right sides of the outrigger, and whether or not to withdraw a first display unit displaying color information; a second display unit for displaying color information on whether the outrigger is withdrawn and whether a Banjockey state is present; and a third display unit displaying menu information for setting or checking the sensor unit.

When any one of the plurality of outriggers is in a banjokey state, the main processor may transmit a blinking signal or a continuous warning sound through the alarm generating unit.

The falling prevention system of the mobile crane according to an embodiment of the present invention can prevent the occurrence of a rollover accident in advance by detecting the outrigger withdrawal state and sending a warning sound when the outrigger is not pulled out when the boom is raised for work.

1 is a view schematically showing a system for preventing the fall of a mobile crane according to an embodiment of the present invention.
FIG. 2 is a view showing a display unit of FIG. 1 .
Figure 3 is a screen showing the state of the outrigger withdrawn in the fall prevention system of the mobile crane according to an embodiment of the present invention.
Figure 4 is a flow chart for explaining the operation of the fall prevention system of the mobile crane according to an embodiment of the present invention.

Terms used in this specification will be briefly described, and the present invention will be described in detail.

The terms used in the present invention have been selected as currently widely used general terms as possible while considering the functions in the present invention, but these may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

When a part "includes" a certain element throughout the specification, this means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, terms such as "...unit" described in the specification mean a unit for processing at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the embodiments of the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Figure 1 is a view schematically showing a system for preventing the fall of a mobile crane according to an embodiment of the present invention, Figure 2 is a view showing the display unit of Figure 1, Figure 3 is a mobile crane according to an embodiment of the present invention It is a screen showing the withdrawal state of the outrigger in the fall prevention system, Figure 4 is a flow chart for explaining the operation of the fall prevention system of the mobile crane according to an embodiment of the present invention.

On the other hand, the present invention detects the outrigger withdrawal state in order to prevent overturning during use of a mobile cargo crane equipped with an outrigger, a high-altitude work vehicle (sky), and an articulated crane, and the outrigger is not drawn out when the boom is raised for work. It is possible to prevent conduction in advance by sending out a warning sound.

The present invention below relates to a fall prevention system for a mobile crane, and in particular, with urbanization, high-rise buildings, etc., construction sites, facility management of buildings, cargo cranes in industrial sites, etc., work height difference (sky), articulated cranes In order to solve the problem that accidents caused by overturning of these cranes and work high-altitude vehicles also occur, resulting in human and material damage, as the frequency of use of these cranes and work high-altitude vehicles increases For this purpose, it relates to a system for preventing a fall accident in advance by sending out a warning sound when the outrigger is not pulled out when the boom is raised.

1, the fall prevention system of the mobile crane 1 according to an embodiment of the present invention is a sensor unit 10, a main processor 20, an alarm generating unit 40, a display unit 50 and It includes a data server (30).

The sensor unit 10 is a device for detecting the withdrawal state information of the outrigger mounted on the mobile crane (1).

The sensor unit 10 may include a slide sensor 11 for detecting the length of the outrigger withdrawn, and a proximity sensor 12 for detecting the boom seated state of the mobile crane 1 .

More specifically, the slide sensor 11 is a sensor that detects the length of the outrigger pull-out, and product specifications include a voltage of DC 5V, a temperature of -20 to 60 degrees, a humidity of 95% RH, and a protection rating. IP65, attachment type is neodymium magnet, internal sensor is 10Kohm variable resistance (PotentionMeter), detection range is 0~5M(0.5~4.5v), wire is 0.2m sus wire, winding method is automatic return method by spring tension. have

In addition, the proximity sensor 12 is a sensor for detecting the boom seated state of the crane (not monitoring the outrigger state when the boom is seated). The humidity is 95% RH, the protection class is IP67, the attachment type is a neodymium magnet, the detection distance is 20mm, the current consumption is less than 10mA, and the output is PNP output.

That is, in the present invention, the sensor unit 10 includes an outrigger extension detection sensor (slide sensor 11) capable of detecting the outrigger withdrawal length and a boom seating sensor (proximity sensor) that detects the boom seating (movement (driving) state of the crane). (12)).

Although not shown, the sensor unit 10 includes an altitude sensor, a geomagnetic sensor, an acceleration sensor, and a gyro sensor in order to more accurately detect movement information such as vertical, vertical, horizontal, tilt information, and location information of the outrigger in real time. It may include at least one.

The main processor 20 is a device provided in the cab of the mobile crane 1 or inside the vehicle, and has a communication interface and an alarm generating program therein, so that the outrigger withdrawal status information detected by the sensor unit 10 or It is a device that outputs alarm information to the outside.

In addition, the main processor 20 calculates the banjo key, the non-retracted state, and the boom seating state information by executing a preset alarm generating program based on the detection information by the sensor unit 10, and uses the calculated information. Based on the alarm information, the alarm information may be output through the alarm generating unit 40 . In particular, the main processor 20 may transmit a blinking signal or a continuous warning sound through the alarm generating unit 40 when any one of the plurality of outriggers is in the Banjockey state.

Additionally, the main processor 20 may transmit the current state to the external data server 30 in real time to enable confirmation of the work state (the current outrigger state is remotely monitored). Through this, when the boom is raised in a state in which the outriggers are not extended, the alarm generating unit 40 may generate a buzzer sound and may transmit a message indicating that the outriggers are not extended state to the manager.

On the other hand, in hydraulic cranes using outriggers, a sensor that detects outrigger withdrawal is not generally applied, and the user manually inputs the withdrawal state, and the non-working direction is usually a state in which the outrigger is not drawn out. In some cases, overturning accidents may occur by rotating in the non-drawing direction due to the driver's erroneous judgment while performing the work.

In the present invention, using the slide sensor 11 and the proximity sensor for detecting the outrigger withdrawal state, when the boom is raised for work, a warning sound is sent out with a buzzer sound when the outrigger is not drawn out.

More specifically, the main processor 20 converts the voltage detection length in the outrigger sensor unit 10, calculates the banjo key and non-draw state logic, detects the boom seat state and flickers the warning light according to the logic. Or as a device for outputting a buzzer sound, the product specifications are DC 18~30V, operating temperature -20~60 degrees, operating humidity 95% RH, protection class IP65, attachment type neodymium magnet (customer Bracket type can be changed upon request), sensor supply voltage is DC+5V (500mA), input is analog (4CH 14bit (0~5V))/digital (DI 2CH (24V)), output is digital (DO 4CH ( FET 5A))), communication is at least one of CAN2.0, RS485, and RS232C, and the monitor uses a 7” 640X480 graphic touch (GRAPHIC TOUCH) LCD method, and has an actual distance (X.Xm 0.1m pitch) of 4 outriggers. , Banjoki status, non-drawing status display, outrigger sensor setting (password entry), Banjoki length value status setting (password entry), and non-drawing status value setting (password entry) functions are provided.

In addition, the main processor 20 transmits the detection data to the external data server 30 for remote monitoring, and for this purpose, the product specifications are DC 24V for use, temperature for use, -20 to 60 degrees, and humidity for use. 95% RH, protection class IP65, neodymium magnet for attachment, RS232 for communication, and 4G networking for transmission.

The alarm generating unit 40 is a device for generating a preset alarm sound or alarm information based on the motion information of the outrigger detected by the sensor unit 10 through the control of the main processor 20, an amplifier speaker, A buzzer or a warning light may be included. This alarm does not output an alarm sound when the outrigger is not pulled out in the boom storage state, and when there is even one outrigger, the yellow warning light flashes and the buzzer sound is output at regular intervals in the banjo key state. blinks the red warning light and outputs a continuous buzzer sound at the same time.

The alarm generator 40 generates an alarm signal to be generated by the main processor 20 among a plurality of alarm information stored therein, amplifies the alarm signal, and then outputs it to the space.

In addition, when a manager located on the ground, in a building, or outside determines that it is urgent for safety, an emergency alert is generated from the alarm generating unit 40 by pressing the button of the wireless remote control (ie, remote control unit (not shown)) possessed by the manager. You can make the signal ring.

The remote control unit is a device for remotely controlling the operation of each component constituting the alarm generating unit 40 by being operated by the operator's operation, and a situation in which an administrator having a remote controller in the vicinity is related to the mobile crane 1 If it is determined that this is dangerous, the alarm generating unit 40 may make an emergency alarm signal sound.

The display unit 50 is a device for displaying the outrigger withdrawal status information or alarm information. As shown in FIGS. 2 and 3 , the display unit 50 includes length information on the front left and right sides and rear left and right sides of the outrigger, and a color for whether or not to withdraw the outrigger. The first display unit 51 for displaying information, the second display unit 52 for displaying color information on whether the outrigger is withdrawn and whether the banjo key is in the state, and menu information for setting or checking the sensor unit 10 . may include a third display unit 53 on which is displayed.

With reference to FIG. 4, the outrigger detection process of the mobile crane 1 will be described using the fall prevention system of the mobile crane 1 according to an embodiment of the present invention configured as described above.

First, when power is supplied to the fall prevention system of the mobile crane 1 according to an embodiment of the present invention, a voice message is sent to confirm the withdrawal state of the outrigger before operation and to confirm the horizontal state of the vehicle.

Then, if the boom is raised without checking the jack withdrawal state and the vehicle inclination state, a voice message is transmitted when the outrigger withdrawal state is confirmed and the vehicle is not pulled out. At this time, one transmits the corresponding direction indication comment, and in the case of two or more, the outrigger non-draw status message is transmitted. For example, a message that the front left outrigger is in an undrawn state may be transmitted.

Then, after checking and detecting the vehicle inclination state, when the angle is abnormal, the corresponding voice message (the vehicle body is tilted) is transmitted.

In more detail, in the fall prevention system of the mobile crane 1 according to an embodiment of the present invention, the mobile crane 1 is in a state before work, the boom is in a horizontal state (storage) state, and the outrigger when moving equipment do not expand In this state, there is no need to transmit the outrigger state.

Then, in preparation for work, the first outrigger is extended to do the work and land. In this state, there is no need to transmit the outrigger state.

And, in the course of the work, the boom storage or standing state is sensed through the proximity sensor, and the work proceeds by elevating the boom for load work. At this time, by working after the boom is erected at a certain angle, the outrigger withdrawal state in this state can be monitored through another sensor of the sensor unit 10 .

In addition, the fall prevention system of the mobile crane 1 according to an embodiment of the present invention sets the maximum outrigger withdrawal length for each equipment, turns on the red light and transmits data when the standard value is less than the standard value, and performs green designed to light up.

In addition, the fall prevention system of the mobile crane 1 according to an embodiment of the present invention is composed of four slide sensors 11 that detect the outrigger withdrawal state, and when the boom is raised, the alarm sounds and the outrigger is not drawn out. In addition to transmitting data to the remote data server 30, a text message may also be transmitted to the terminal of the administrator.

In addition, the fall prevention system of the mobile crane 1 according to an embodiment of the present invention detects the outrigger withdrawal state (identification of the initial working condition), and generates an alarm sound when the outrigger is not pulled out when the boom is raised.

For example, the fall prevention system of the mobile crane 1 according to an embodiment of the present invention uses the slide sensor 11 and the proximity sensor 12 to detect the outrigger withdrawal state when the boom is raised for work. It can be implemented as a buzzer type that sends out a warning sound with a buzzer sound when not drawn, a warning light type that flashes a warning light, or a system in which the two types are combined.

In addition, the fall prevention system of the mobile crane 1 according to an embodiment of the present invention consists of a slide sensor 11 that detects an outrigger withdrawal state, a two-axis tilt sensor, and a wireless rotation gyro sensor, and a containment sensor For use work, it can be implemented as a system that sends out a warning sound by voice when the outrigger is not pulled out when the boom is raised, and sends out a warning sound by voice when the vehicle angle is greater than the set angle.

The fall prevention system of the mobile crane 1 according to an embodiment of the present invention configured as described above detects the outrigger withdrawal state and sends out a warning sound when the outrigger is not pulled out when the boom is raised for work to prevent the occurrence of a rollover accident. can be prevented in advance.

Meanwhile, in the present invention, an anticorrosion coating layer may be applied to the surface of the outrigger in order to prevent corrosion of the metal surface. The coating material of this anticorrosion coating layer is 20 wt% of benzimidazole, 30 wt% of propylene glycol methyl ether, 15 wt% of hafnium, 10 wt% of molybdenum emulsification (MoS2), 15 wt% of aluminum oxide, and bisphenol F-type diglycy. It is composed of 10% by weight of dil ether, and the coating thickness can be formed to 8㎛.

Benzimidazole, propylene glycol methyl ether, and bisphenol F-type diglycidyl ether serve to prevent corrosion and discoloration.

Hafnium is a transition metal element with corrosion resistance, and serves to have excellent waterproof and corrosion resistance.

Molybdenum emulsified plays a role in imparting lubricity and lubricity to the surface of the coating film.

Aluminum oxide is added for the purpose of fire resistance and chemical stability.

The reason why the ratio of the components and the coating thickness are numerically limited as described above is that the present inventors repeatedly failed several times and analyzed through the test results. As a result, the optimal anti-corrosion effect was exhibited at the ratio.

On the other hand, an anti-contamination coating layer coated with an anti-contamination coating composition may be formed on the outer surfaces of the display unit 50 and the alarm generating unit 40 to effectively achieve adhesion prevention and removal of pollutants.

The antifouling coating composition contains cocamidopropyl betaine and amphoglycinate in a molar ratio of 1:0.01 to 1:2, and the total content of cocamidopropylbetaine and amphoglycinate is 1 to 10% by weight.

The molar ratio of cocamidopropyl betaine and amphoteric glycinate is preferably 1:0.01 to 1:2. When the molar ratio is out of the above range, the coating film is removed due to reduced applicability or increased water adsorption on the surface after application. There is a problem.

The cocamidopropyl betaine and amphoteric glycinate are preferably used in an amount of 1 to 10% by weight in the aqueous solution of the entire composition, and when it is less than 1% by weight, there is a problem in that the coatability is deteriorated, and when it exceeds 10% by weight, the thickness of the coating film increases. crystal precipitation is likely to occur due to

On the other hand, as a method of applying the present antifouling coating composition, it is preferable to apply by a spray method. In addition, the final coating film thickness of the composition for antifouling coating is preferably 550 to 2000 Å, more preferably 1100 to 1900 Å. If the thickness of the coating film is less than 550 Å, there is a problem in that it is deteriorated in the case of high-temperature heat treatment, and if it exceeds 2000 Å, there is a disadvantage that crystal precipitation on the coated surface is easy to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of cocamidopropyl betaine and 0.05 mol of amphoglycinate to 1000 ml of distilled water and then stirring.

What has been described above is only one embodiment for implementing the system for preventing a mobile crane from falling according to the present invention, and the present invention is not limited to the above embodiment, and as claimed in the claims below, the present invention Without departing from the gist, it will be said that the technical spirit of the present invention exists to the extent that various modifications can be made by anyone with ordinary knowledge in the field to which the invention pertains.

1: mobile crane 10: sensor unit
11: slide sensor 12: proximity sensor
20: main processor 30: data server
40: alarm generating unit 50: display unit
51: first display unit 52: second display unit
53: third display unit

Claims (4)

a sensor unit for detecting withdrawal state information of an outrigger mounted on a mobile crane; and
A main processor having a communication interface and an alarm generating program therein and outputting information about an outrigger withdrawal state or alarm information sensed by the sensor unit to the outside,
the sensor unit
a slide sensor for detecting a length of the outrigger withdrawn; and
Including; proximity sensor for detecting the boom seated state of the mobile crane;
The main processor calculates Banjaki, non-drawing state, and boom seating state information by executing a preset alarm generating program based on the detection information by the sensor unit, and generates an alarm through the alarm generating unit based on the calculated information. print information,
Further comprising a display unit for displaying the retrieval status information or alarm information of the outrigger,
the display unit
a first display unit for displaying length information on the front left and right sides and rear left and right sides of the outrigger and color information on whether to withdraw;
a second display unit for displaying color information on whether the outrigger is withdrawn and whether the Banjockey is in a state; and
and a third display unit on which menu information for setting or inspection of the sensor unit is displayed,
The main processor transmits a flashing signal or a continuous warning sound through the alarm generator when any one of the plurality of outriggers is in the Banjoki state. , Operating humidity is 95% RH, protection class is IP65, attachment type is neodymium magnet, sensor supply voltage is DC+5V(500mA), input is analog (4CH 14bit(0~5V))/digital(DI 2CH( 24V)), output is digital (DO 4CH (FET 5A)), communication is implemented with at least one of CAN2.0, RS485, RS232C,
An anticorrosion coating layer is applied to the surface of the outrigger, and the coating material of the anticorrosion coating layer is 20 wt% of benzimidazole, 30 wt% of propylene glycol methyl ether, 15 wt% of hafnium, 10 wt% of molybdenum emulsification (MoS2) %, aluminum oxide 15% by weight, bisphenol F-type diglycidyl ether 10% by weight, and the coating thickness is formed to 8㎛,
An antifouling coating layer coated with an antifouling coating composition is formed on the outer surfaces of the display unit and the alarm generating unit, and the antifouling coating composition contains cocamidopropylbetaine and amphoteric glycinate 1:0.01 to 1:2 It is included in a molar ratio, and the total content of cocamidopropylbetaine and amphoglycinate is 1 to 10% by weight based on the total aqueous solution.
delete delete delete

Images