KR102003497B1 - System and method for preventing falling down of construction vehicle having caterpillar - Google Patents

Abstract

The present invention relates to an apparatus and method for preventing the fall of a crawler type construction equipment to detect the ground pressure between the endless track of the construction equipment and the ground, and to prevent the fall accident of the construction equipment based on this.
That is, the present invention is equipped with a sensor that can detect the ground pressure between the endless track and the ground in the lower roller configuration of the endless track of construction equipment, the ground pressure distribution with the ground and ground state (soft ground, depression, etc.) It is to provide an apparatus and method for preventing the fall of the tracked construction equipment to prevent the fall accident of the tracked construction equipment by sensing and measuring the accurate fall moment.

Description

Device and method for preventing falling of caterpillar construction equipment {System and method for preventing falling down of construction vehicle having caterpillar}

The present invention relates to an apparatus and method for preventing the fall of an endless track construction equipment, and more particularly, to detect the ground pressure between the endless track of the construction equipment and the ground, and to prevent the fall of the construction equipment based on this. An apparatus and method for preventing falling of a crawler type construction equipment.

Among the construction equipment, a crawler crane (crane crane), a navigator / propeller, a perforator, an excavator, etc. may be used.

Since the caterpillar construction equipment mainly works on rough roads or irregular roads, the following fall hazards always exist during work or movement.

1) the possibility of conduction due to ground subsidence due to excellent civil works,

2) Overturning due to ground cracking and settlement by repeated lifting and driving,

3) fall of allowable bearing capacity review error and omission according to soil type,

4) Crane conduction due to ground subsidence on the movement path,

5) conduction by unevenness of the road surface of the ramp section,

6) The moving ramps of the caterpillar construction equipment (especially cranes) should be formed smoothly, but the ramp sections are formed while maintaining a certain angle of repose, so that the rear of the caterpillar sinks a little when the caterpillar front is located at the top of the ramp. Evangelize.

Due to such fall risks, fall accidents of construction machinery such as ground, environment, and carelessness are frequently occurring at construction sites such as civil engineering works.

For reference, unlike other construction machines, the tracked construction equipment has the advantage of being able to work on a soft ground or a narrow place.In this case, the tracked track can be maintained in the most stable state when the ground state is evenly distributed with the ground. If the ground state is distributed evenly on the ground, the lifting operation according to the lifting load table does not cause the fall of construction equipment such as crane.

In particular, in the construction of caterpillar construction equipment, if the ground is not flat, overslope prevention device, over-moment prevention device, and the installation of plate and steel plate on the soft ground can prevent the fall, but construction equipment such as crane by slope It is not possible to prevent the fall completely because the conditions such as the moment value change and the ground subsidence due to the driving and lifting work are not the same and are constantly changing.

The present invention has been made in order to solve the above-mentioned conventional problems, equipped with a sensor that can detect the ground pressure between the endless track and the ground in the lower roller configuration of the endless track of the construction equipment, the ground pressure distribution with the ground It provides a device and method for preventing the fall of tracked construction equipment that can detect the fall of the tracked construction equipment by detecting the sensing and ground conditions (soft ground, depression, etc.) and measuring the accurate fall moment. Its purpose is.

One embodiment of the present invention for achieving the above object is: a load sensor mounted on the lower roller inscribed with the endless track, the load sensor for detecting the ground load between the endless track and the ground; A controller that analyzes the distribution of ground loads for the entire ground section of the endless track based on the detection signal of the load sensor; And a display for displaying the ground load distribution of the caterpillar analyzed by the controller. It provides a fall prevention device of the crawler construction equipment, characterized in that configured to include.

Preferably, the load sensor is characterized in that it is mounted to each of the plurality of lower rollers inscribed with the track shoe of the endless track.

More preferably, the load sensor is characterized in that the fastening is inserted in the pin-type method in the mounting hole formed in the rotating shaft of each lower roller.

Another embodiment of the present invention for achieving the above object comprises: detecting a ground load between the endless track and the ground in a load sensor mounted on the lower roller inscribed with the endless track; Analyzing the ground load distribution for the entire ground section of the endless track in the controller based on the detection signal of the load sensor; And displaying, on the display, the ground load distribution of the caterpillar analyzed by the controller. It provides a method of preventing the fall of the caterpillar construction equipment comprising a.

Preferably, the ground load distribution information for the entire ground section of the caterpillar analyzed by the controller further comprises the step of transmitting in real time transmitted to the construction equipment cab via a communication module.

More preferably, it is characterized in that it further comprises the step of warning through the warning means by determining the possibility of conduction in accordance with the ground load distribution of the caterpillar analyzed by the controller.

Through the above problem solving means, the present invention provides the following effects.

According to the present invention, by mounting a load sensor to detect the ground pressure between the endless track and the ground in the lower roller configuration, the grounding pressure distribution and the accurate conduction for the entire section of the endless track contacting the ground By allowing the driver to know the moment, it is possible to prevent the fall accident of the tracked construction equipment.

In other words, in addition to the uneven grounding between the endless track and the ground, the grounding pressure is variable when turning and moving in the horizontal grounding state, and when the external force is affected by weather conditions such as wind. By allowing the driver and the like to know the grounding pressure distribution and the exact conduction moment for the entire section, it is possible to prevent the conduction accident of the caterpillar construction equipment.

Figure 1 is a side view showing a crane which is a kind of crawler construction equipment,
Figure 2 is a side view showing an example of the conduction conditions of the crane which is a kind of crawler construction equipment,
Figure 3 is a block diagram showing a fall prevention device of the crawler construction equipment according to the present invention,
4 is an image showing the ground load acting from the endless track of the crawler construction equipment according to the present invention toward the lower roller,
5a to 5e is an image showing the detection and display of the ground load of the caterpillar according to the working conditions of the caterpillar construction equipment according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of a crawler crane, which is a kind of crawler construction equipment, will be described below to help understand the present invention.

1 is a side view showing a crane which is a kind of crawler type construction equipment, wherein reference numeral 10 designates a crawler.

The track 10 is provided with a structure in which a plurality of track shoes 11 are connected to one, and is rotatably wound around the turntable 15, which is the driving wheel of the crane, and the idler 16 in an idle state.

In addition, a side frame 18 is present between the turner 15 and the idler 16. The upper roller 17 inscribes and guides rotation with the upper endless track 10 above the side frame 18. ) Is mounted, and the lower roller 12 which is inscribed and guides the rotation of the lower endless track, ie, the endless track 10 grounded to the ground, is mounted below the side frame 18.

At this time, the lower roller 12 is arranged in a plurality at regular intervals along the direction of rotation of the endless track, and guides the rotation of the endless track while inscribed with the track shoe 11 constituting the endless track 10.

As the crawler crane having such a configuration mainly works on rough roads or irregular roads as described above, there is always a danger of falling during work or movement.

For example, as shown in FIG. 2, there is a risk of falling by unevenness of the road surface of the ramp section, and when moving on a pallet (steel plate, steel plate, etc.), the fall can be prevented, but the construction equipment such as a crane by a slope Conditions such as change of moment value and ground subsidence due to running and lifting repetitive work are not the same and are constantly changing.

To this end, the present invention is equipped with a sensor that can detect the ground pressure between the endless track and the ground on the lower roller of the endless track configuration of construction equipment, the ground pressure distribution with the ground and ground state (soft ground, depression, etc.) The main focus is to prevent the falling accident of caterpillar construction equipment by detecting and measuring the exact falling moment.

3 is a block diagram showing a fall prevention apparatus of the crawler type construction equipment according to the present invention.

In FIG. 3, reference numeral 12 designates a lower roller inscribed with the caterpillar 10 of the crane.

Here, the pin-type load sensor 20 is mounted on the lower roller 12 to detect the ground load between the endless track 12 and the ground.

In more detail, the load sensor 20 is mounted on each of the plurality of lower rollers 12 inscribed with the track shoe 11 of the endless track 10, the rotary shaft 13 of each lower roller 12 It is inserted into and fastened in the mounting hole 14 formed in the pin-type method to serve as a rotating shaft and detect the ground load between the endless track 12 and the ground.

On the other hand, when the track 10 rotates, each track shoe 11 constituting the track is grounded with the ground, the ground load at this time from the track shoe toward the lower roller 12 as shown in FIG. Delivered.

At this time, the ground load transmitted from the track shoe 11 toward the lower roller 12 is sensed by the load sensor 20.

The detection signal of the load sensor 20 sensed in this way is transmitted to the controller 30 built in the cab, etc., the controller 30 based on the detection signal of the load sensor 20, the entire ground of the endless track in contact with the ground Analyze the ground load distribution for the interval.

Subsequently, the controller 30 controls to display the ground load distribution of the caterpillar on the display 40 so that the driver or the like can see it.

Here, the method of preventing the fall of the caterpillar construction equipment of the present invention based on the above configuration in order as follows.

First, the ground load between the endless track and the ground is detected by the load sensor 20 mounted on the lower end roller 12 inscribed with the endless track 10.

That is, the load sensor 20 detects the ground load transmitted from the track shoe 11 constituting the endless track to the lower roller 12.

When the detection signal of the detected load sensor 20 is transmitted to the controller 30, the controller 30 analyzes the ground load distribution for the entire ground section of the caterpillar.

For example, the critical load state is determined based on the data acquired by the load sensor 20 in the controller 30, and the rated load and the rated total load for each work condition and condition are determined.

Rated gross load: The sum of the maximum permissible lift and the additional load (weight of the hook and other lifted tools).

* Rated Load: Load minus total load of equipment, such as hooks, grabs, buckets, etc.

* Critical load: The maximum load that can be lifted at the end of a crane boom just before falling, ie the moment when the counterweight, the back of the crane, is lifted when the maximum load is lifted.

Subsequently, the track load distribution of the caterpillar analyzed by the controller 30 is displayed and controlled on the display 40. When the conduction moment occurs during operation and reaches the critical load, as shown in FIGS. 5A to 5E, the conduction direction ( The load is concentrated by the green lower roller on the display, and the load transmitted from the lower track shoe in contact with the ground in the opposite direction to the lower roller is reduced (indicated by the red lower roller on the display).

FIG. 5A detects the possibility of conduction during non-lifting operation of a crane due to the difference in the ground loads between the endless track and the ground according to the terrain and the ground, or detects the possibility of conduction when the endless track is positioned on the settled ground due to repetitive lifting. Shows an example shown on the display.

5B shows an example in which a ground load difference occurs due to the front subsidence or the soft ground of the ground during the lifting operation of the crane, compared to another where the front side between the endless track and the ground is different, thereby detecting the possibility of conduction and displaying it on the display.

FIG. 5C illustrates an example of sensing the possibility of conduction according to the front side inclination during the lifting operation, and FIG. 5D illustrates an example of sensing the possibility of conduction during the lifting turning operation on the inclined ground and displaying it on the display.

In addition, FIG. 5E illustrates an example in which one caterpillar grounding force differs from the other caterpillar grounding force due to a weather (especially wind) condition while maintaining a normal ground state with the ground.

As described above, in addition to the uneven grounding state between the endless track and the ground, the grounding pressure is varied during turning and moving in the horizontal grounding state, and even when the external force is applied depending on weather conditions such as wind. By allowing the driver and the like to know the ground pressure distribution and the exact conduction moment for the entire section of the track, it is possible to prevent the fall accident of the caterpillar construction equipment by taking measures such as stopping operation.

In addition, when there is a possibility of conduction in accordance with the ground load distribution of the caterpillar analyzed by the controller 30, the driver can hear through the acoustic warning means 36 so that the driver who does not see the display can hear the warning sound. Listening and awareness of the possibility of evangelism can be prevented accordingly by stopping work.

As seen above, load sensors are installed on the crawler of all construction heavy equipment such as crawler cranes, rudders and navigators, perforators, and excavators, and the conditions of the workplace (ground type, slope, ground state (soft ground) Irrespective of the environment (wind, climate, etc.) and the type of work, etc., it can detect the endless track of the construction equipment and the ground pressure between the ground. Can be prevented in advance.

On the other hand, the anti-wear coating layer may be applied around the rotation shaft (13).

The anti-wear coating layer is formed by spraying a powder composed of 96 to 98% by weight of chromium oxide (Cr ₂ O ₃ ) and ₂ to 4% by weight of titanium dioxide (TiO ₂ ) to the rotary shaft 13. It is made of a thickness of 600 ㎛, the hardness is applied to the plasma to maintain 900 ~ 1000HV.

The reason for applying ceramic on the outer circumferential surface of the rotating shaft 13 is mainly to prevent wear and to prevent corrosion. Ceramic coating is superior to chromium plating or nickel chromium plating in corrosion resistance, scratch resistance, abrasion resistance, impact resistance and durability.

Chromium oxide (Cr ₂ O ₃ ) serves to prevent rust by acting as a passivity layer that blocks oxygen invading into the metal.

Titanium dioxide (TiO ₂ ) is very stable physicochemically and has a high hiding power, thus becoming a white pigment. In addition, the refractive index is high, it is widely used in high refractive index ceramics. It has photocatalytic and superhydrophilic properties. Titanium dioxide (TiO ₂ ), air purification, antibacterial, harmful substance decomposition, pollution prevention function, discoloration prevention function. The titanium dioxide (TiO ₂ ), so that the anti-wear coating layer is reliably coated on the outer circumferential surface of the rotary shaft 13, and decomposes and removes foreign matter attached to the anti-wear coating layer to prevent damage to the anti-wear coating layer.

Here, when chromium oxide (Cr ₂ O ₃ ) and titanium dioxide (TiO ₂ ) are mixed and used, the mixing ratio thereof is titanium oxide (TiO ₂ ) 2 in 96 to 98% by weight of chromium oxide (Cr ₂ O ₃ ). It is preferable that -4 weight% is mixed.

When the mixing ratio of chromium oxide (Cr ₂ O ₃ ) is less than 96-98%, the coating of chromium oxide (Cr ₂ O ₃ ) is often broken in an environment such as high temperature, and accordingly, the rotating shaft 13 The antirust effect of the outer circumferential surface of the abruptly decreased.

When the mixing ratio of titanium dioxide (TiO ₂ ) is less than 2 to 4% by weight, the effect of titanium dioxide (TiO ₂ ) was so small that the purpose of mixing it with chromium oxide (Cr ₂ O ₃ ) is faded. That is, titanium dioxide (TiO ₂ ) decomposes and removes foreign matter adhering around the outer circumferential surface of the rotating shaft 13 to prevent the outer circumferential surface of the rotating shaft 13 from being corroded or damaged. The mixing ratio is more than 2 to 4% by weight. If small, there is a problem that takes a long time to decompose the attached foreign matter.

The wear-resistant coating layer made of such materials is formed with a thickness of 50 to 600 µm around the outer circumferential surface of the rotating shaft 13, and is coated with plasma so as to maintain the hardness of 900 to 1000 HV and the surface roughness of 0.1 to 0.3 µm.

Such abrasion-proof coating layer is sprayed at 50 to 600 占 퐉 by jet-spraying the powdered powder and the gas at 1400 ° C around the outer circumferential surface of the rotating shaft 13 at a speed of about Mach 2.

If the thickness of the anti-wear coating layer is less than 50 μm, the effect of the above-described ceramic coating layer is not guaranteed. If the thickness of the anti-wear coating layer exceeds 600 μm, the above-mentioned effect is insignificant while excessive ceramic is excessive. There is a problem in that work time and material costs are wasted by application.

While the wear protection coating layer is applied to the outer circumferential surface of the rotating shaft 13, the temperature of the outer circumferential surface of the rotating shaft 13 is increased, and the outer circumferential surface of the rotating shaft 13 is cooled to prevent deformation of the outer circumferential surface of the heated rotating shaft 13. It is cooled to) to maintain a temperature of 150 ~ 200 ℃.

The sealing material made of chromic anhydride (CrO ₃ ) made of a metallic glass quartz system may be further coated around the wear protection coating layer. Chromic anhydride is applied around a coating layer made of chromium nickel powder as an inorganic sealing material.

Chromic anhydride (CrO ₃ ) is used in places requiring high wear resistance, lubricity, heat resistance, corrosion resistance, and releasability, and does not discolor in the air, has great durability, and has good wear resistance and corrosion resistance. As for the coating thickness of a sealing material, about 0.3-0.5 micrometer is preferable. When the coating thickness of the sealing material is less than 0.3 μm, the sealing material is easily peeled off and peeled even in a slight scratch groove, so that the above-described effects cannot be obtained. If the coating thickness of the sealing material is thick enough to exceed 0.5 μm, there are many pin holes, cracks, and the like on the plating surface. Therefore, the coating thickness of the sealing material is preferably about 0.3 to 0.5 mu m.

Therefore, since the coating layer having excellent wear resistance and oxidation resistance is formed around the outer circumferential surface of the rotating shaft 13, the outer circumferential surface of the rotating shaft 13 is prevented from being worn or oxidized, thereby extending the life of the product.

In addition, the anti-corrosion coating layer may be formed around the mounting hole 14 using a metal surface coating material to prevent corrosion of the surface from dust, contaminants, and the like. The anti-corrosion coating layer is composed of 60% by weight of alumina powder, 30% by weight of NH ₄ Cl, 2.5% by weight of zinc, 2.5% by weight of copper, 2.5% by weight of magnesium, and 2.5% by weight of titanium.

The alumina powder is added for the purpose of sintering, tangling, fusion prevention, etc. when heated to a high temperature. When the alumina powder is added in less than 60% by weight, the effect of sintering, tangling and fusion prevention is inferior, and when the alumina powder exceeds 60% by weight, the above-mentioned effect is not further improved, while the material cost is greatly increased. Therefore, it is preferable to add 60 weight% of alumina powders.

The NH ₄ Cl reacts with the aluminum, zinc, stocks, copper and magnesium in the vapor state to serve to activate diffusion and penetration. This NH ₄ Cl is added 30% by weight. If NH ₄ Cl is added at less than 30% by weight, it does not react properly with vaporized aluminum, zinc, stock copper and magnesium and thus does not activate diffusion and penetration. On the other hand, when NH ₄ Cl exceeds 30% by weight, the above-mentioned effect is not improved further, while the material cost is greatly increased. Therefore, it is preferable to add 30% by weight of NH ₄ Cl.

The zinc is formulated to prevent corrosion of metals in water and to be used for electrical applications. This zinc is mixed 2.5% by weight. If the mixing ratio of zinc exceeds 2.5% by weight, it will not properly prevent corrosion of the metal on water. On the other hand, when the mixing ratio of zinc exceeds 2.5% by weight, the above-mentioned effect is not improved further, while the material cost is greatly increased. Therefore, the zinc is preferably mixed 2.5% by weight.

The copper is combined with the aluminum to increase the hardness and tensile strength of the metal. This copper is mixed 2.5% by weight. If the mixing ratio of copper is less than 2.5% by weight, when combined with aluminum, the hardness and tensile strength of the metal may not be properly increased. On the other hand, if the mixing ratio of copper exceeds 2.5% by weight, the above-mentioned effect is not improved further, while the material cost is greatly increased. Therefore, the copper is preferably mixed 2.5% by weight.

Since the pure metal of magnesium has a low structural strength, the magnesium is combined with zinc to increase the hardness, tensile strength and corrosion resistance of the metal. This magnesium is mixed 2.5% by weight. If the mixing ratio of magnesium is less than 2.5% by weight, the hardness, tensile strength and corrosion resistance to salt water of the metal when combined with zinc and the like are not significantly improved. On the other hand, when the mixing ratio of magnesium exceeds 2.5% by weight, the above-mentioned effect is not improved further, while the material cost is greatly increased. Therefore, magnesium is preferably mixed at 2.5% by weight.

The titanium is a light, hard and corrosion-resistant transition metal element has a silver-white metallic luster, and because of its excellent corrosion resistance and low specific gravity, the weight of the titanium is only 60% compared to steel, so that the weight of the coating material applied to the metal base material is reduced but the gloss is increased. It is formulated to have excellent waterproof and corrosion resistance.

This titanium is mixed 2.5% by weight. When the mixing ratio of titanium is less than 2.5% by weight, the weight of the coating material applied to the metal base material is not so much reduced, and the glossiness, waterproofness, and corrosion resistance are not greatly improved. On the other hand, if the mixing ratio of titanium exceeds 2.5% by weight, the above-mentioned effect is not further improved while the material cost is greatly increased. Therefore, the titanium is preferably mixed 2.5% by weight.

The surface coating method of the mounting hole 14 according to the present invention is as follows.

In order to prevent the oxidation of the mounting holes 14, the mounting holes 14 and the coating material blended in the above-mentioned structure are to be put together in the closing furnace and the inside of the closing furnace is formed at a rate of 2 L / min. Argon gas is injected, and maintained at a temperature of 700 ° C to 800 ° C for 4 to 5 hours while argon gas is injected.

By performing the above steps, the vaporized alumina powder, zinc, copper, magnesium and titanium are formed inside the closed furnace, and the aluminum powder, alumina powder, zinc, copper, magnesium and titanium compound penetrates into the surface of the mounting hole 14. The coating layer is formed.

After the anti-corrosion coating layer is formed, the internal temperature is closed to maintain the coating material / substrate composite at 800 ℃ ~ 900 ℃ for 30 to 40 hours, and the anti-corrosion coating layer is formed on the surface of the base material. It is isolated. At this time, the sudden temperature change in performing the above process causes the coating layer on the surface of the base material to be peeled off, thereby causing a temperature change at a rate of 60 ° C / hr.

The anti-corrosion coating layer of the present invention has the following advantages.

Since the anti-corrosion coating layer of the present invention has a very wide range of uses, it can be applied by various methods such as curtain coating, spray painting, dip coating, flooding, and the like.

The anti-corrosion coating layer of the present invention can be applied with a very thin layer thickness in addition to the principle protection against corrosion and / or scale, thereby improving the electrical conductivity as well as saving material and cost. Even after hot forming, if a high electrical conductivity is desired, a thin conductive primer may be applied on top of the anti-corrosion coating layer.

After the forming process or the hot forming process, the coating material may be retained on the surface of the substrate, for example, to increase scratch resistance, to improve corrosion protection, to meet aesthetic appearance, to prevent discoloration, and to be electrically conductive. And can be provided as a primer for conventional downstream processes (eg, dip and electrophoretic dip coating).

The present invention is coated with alumina powder, NH ₄ Cl, zinc, copper, magnesium, titanium in the mounting hole 14 of the present invention is applied to the surface corrosion phenomenon of the mounting hole 14 from dust, contaminants, etc. Can be prevented.

In addition, the load detection sensor 20 may be formed with a surface protective coating layer containing a silicon component in order to solve the surface contamination problem that causes the coming back of the load sensor 20 and shorten the life.

The surface protective coating layer can prevent adhesion of microorganisms and suspended solids and prevent backcounting and extend the service life of the load sensor 20 semi-permanently. To briefly describe the method of preparing the coating solution, first, a dimethyldichlorosilane solution is dissolved in a volume ratio of 2-5% in an ethyl acetate solution to prepare a coating solution. In this case, if the content of the dimethyldichlorosilane solution is less than 2%, the effect of the coating may not be sufficiently obtained, and if the content of the dimethyldichlorosilane solution exceeds 5%, the surface protective coating layer may be too thick, resulting in poor efficiency. The coating solution dissolved in the above ratio is preferably in the range of 0.8-2cp (centifase) in consideration of the coating time and the coating thickness. This is because if the viscosity is too low, the application time should be long, and if the viscosity is too high, the application may occur thick and not dry, and also may cause the backing of the sensor due to uneven application.

In the present invention, the coating solution prepared as described above is applied to the surface of the load sensor 20 to a thickness of 1㎛ or less. At this time, when the thickness of the surface protective coating layer exceeds 1 μm, the sensitivity of the sensor is lowered. Therefore, the thickness of the surface protective coating layer is limited to 1 μm or less. In addition, as a method of applying the thickness as described above, a spray method of spraying about 2-3 times on the surface of the load sensor 20 may be used.

In addition, a sound absorbing layer may be applied to an inner surface of the outer case of the controller 30. A needle punch nonwoven fabric may be used as the nonwoven fabric constituting the sound absorbing layer.

Examples of the fibers constituting the sound absorbing layer made of the needle punch nonwoven fabric include polyester fibers, nylon fibers, polypropylene fibers, acrylic fibers, and natural fibers.

It is preferable that the thickness of the said sound absorption layer is 0.3-15 mm. If the thickness of the sound absorbing layer is less than 0.3mm, sufficient sound absorbing effect is not obtained, and if the thickness of the sound absorbing layer exceeds 15mm, the inner space of the outer case of the controller 30 is reduced and the outer case space of the controller 30 is not sufficiently obtained. This is undesirable.

The unit weight of the sound absorbing layer is preferably set to 10 ~ 1000g / m ² . If it is less than 10 g / m ² , sufficient sound absorption effect is not obtained, and if it exceeds 1000 g / m ² , it is not preferable because the lightness of the outer case of the controller 30 cannot be secured.

The fineness of the fibers constituting the sound absorbing layer is preferably in the range of 0.1 to 30 decitex. If it is less than 0.1 decitex, it is not preferable because absorption of low frequency noise is difficult and cushion property is also reduced. It is also undesirable to exceed 30 decitex because it is difficult to absorb high frequency noise. Especially, as for the fineness of the fiber which comprises a sound absorption layer, it is more preferable to set it as the range of 0.1-15 decitex.

Since the sound absorbing layer is provided on the inner side of the outer case of the controller 30, the noise during driving of the controller 30 can be reduced.

In addition, the outer case of the communication module 32 is made of a synthetic resin material, and to the outer case of the synthetic resin material, BHT (2,6-DI-BUTYL-4-METHYLPHENOL), which is a phenolic antioxidant, is added to increase oxidation resistance. can do. This BHT increases ozone resistance and oxidation resistance, and prevents corrosion and oxidation of the outer case of the communication module 32.

In the present invention, when the sum of the synthetic resin material and the BHT is 100 parts by weight, it is preferable that the BHT includes 0.4 to 1.2 parts by weight. This is because when the amount of BHT added is less than the above-mentioned range, it is difficult to obtain oxidation resistance, and when it exceeds the above-mentioned range, there is a problem that affects the density and firmness of the tissue.

In the present invention, since the BHT is further added to the outer case of the communication module 32 of the synthetic resin material, the oxidation resistance is greatly improved, thereby maximizing the life of the product.

10: caterpillar
11: track shoe
12: lower roller
13: axis of rotation
14: mounting hole
15: turntable
16: idler
17: upper roller
18: side frame
20: load detection sensor
30: controller
32: communication module
36: warning means
40: display

Claims (6)

A load sensor 20 mounted on the lower roller 12 inscribed with the crawler 10 and detecting the ground load between the crawler 12 and the ground;
A controller (30) for analyzing the ground load distribution for the entire ground section of the endless track in contact with the ground based on the detection signal of the load sensor (20); And
And a display (40) displaying the ground load distribution of the caterpillar analyzed by the controller (30);
The load sensor 20 is mounted on each of the plurality of lower rollers 12 inscribed with the track shoe 11 of the endless track 10;
The load sensor 20 is inserted and fastened in a pin-type manner into the mounting hole 14 formed in the rotary shaft 13 of each lower roller 12;
A plurality of track shoes 11 are provided as an endless track 10 having a structure connected to one, and is rotatably wound around the turntable 15, which is the driving wheel of the crane, and the idler 16 in the idle state, and the turnable 15 The side frame 18 is provided between the idler 16 and the upper frame 17 which is inscribed with the upper endless track 10 and rotates and is mounted on the upper side of the side frame 18. 18, the lower roller 12 which is inscribed and guides the rotation of the endless track 10, which is grounded with the ground, is mounted, and the lower rollers 12 are arranged at regular intervals along the rotational direction of the endless track, Guide the rotation of the caterpillar while inscribed with the track shoe 11 constituting the caterpillar 10;
When the track 10 rotates, each track shoe 11 constituting the track is grounded with the ground, and the ground load at this time is transmitted from the track shoe toward the lower roller 12, and the track shoe 11 The ground load transmitted from the lower roller 12 to the load sensor 20 is detected, and the detected signal of the detected load sensor 20 is transmitted to the controller 30 built in the cab, the controller 30 ) Analyzes the ground load distribution of the entire ground section of the endless track in contact with the ground based on the detection signal of the load sensor 20;
The warning means 36 are connected to the controller 30, so that if there is a possibility of conduction according to the caterpillar load distribution analyzed by the controller 30, the driver can listen through the warning means 36, thereby displaying the display. The driver who does not see the alarm can hear the beep and recognize the possibility of falling, thus preventing the fall from happening by stopping work;
The anti-wear coating layer is coated around the rotary shaft 13, wherein the anti-wear coating layer is mixed with 96 to 98% by weight of chromium oxide (Cr ₂ O ₃ ) and ₂ to 4% by weight of titanium dioxide (TiO ₂ ) Powder is formed by spraying on the rotating shaft 13, is made of a thickness of 50 to 600㎛, the hardness is plasma applied to maintain 900 to 1000HV;
Mounting hole 14 is formed in the rotating shaft 13, the anti-corrosion coating layer is formed around the mounting hole 14, the anti-corrosion coating layer is 60% by weight of alumina powder, 30% by weight of NH ₄ Cl, 2.5 wt% zinc, 2.5 wt% copper, 2.5 wt% magnesium, 2.5 wt% titanium;
A surface protective coating layer is formed on the load sensor 20, wherein the surface protective coating layer is a coating solution of the surface protective coating layer, 2-5% by volume of dimethyldichlorosilane solution in ethyl acetate solution. Prepared by dissolving, and the viscosity of the coating solution is in the range of 0.8-2cp (centifase);
A sound absorbing layer is applied to the inner side of the outer case of the controller 30, the thickness of the sound absorbing layer is 0.3 ~ 15mm, the unit weight of the sound absorbing layer is 10 ~ 1000g / m ² , and constitutes the sound absorbing layer The fineness of the fiber ranges from 0.1 to 30 decitex;
The ground load distribution information for the entire ground section of the caterpillar analyzed by the controller 30 is transmitted in real time to the construction equipment cab via the communication module 32, the outer case of the communication module 32 is a synthetic resin material In the outer case of the synthetic resin material, BHT (2,6-DI-BUTYL-4-METHYLPHENOL), which is a phenolic antioxidant, is added, and when the sum of the synthetic resin material and the BHT is 100 parts by weight, the BHT is 0.4 An apparatus for preventing the fall of a crawler type construction equipment, comprising ~ 1.2 parts by weight.
delete delete As a method of preventing the fall of the tracked construction equipment using the fall prevention device of the tracked construction equipment of claim 1,
Detecting a ground load between the endless track and the ground in a load sensor 20 mounted on the bottom end roller 12 inscribed with the endless track 10;
Analyzing the ground load distribution for the entire ground section of the caterpillar in the controller 30 based on the detection signal of the load sensor 20;
Displaying on the display (40) the distribution of the ground load of the caterpillar analyzed by the controller (30);
The ground load distribution information for the entire ground section of the caterpillar analyzed by the controller 30 further includes the step of transmitting in real time to the construction equipment cab via the communication module 32;
Determining the conduction potential according to the ground load distribution of the caterpillar analyzed by the controller (30) to warn through the warning means (36) further comprising the method. delete delete

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