KR102552822B1 - Piezoelectric generator applied to resilient flooring - Google Patents

Abstract

The present invention provides a piezoelectric power generator applied to an elastic floor, wherein a piezoelectric power generation unit is buried in the ground to generate electricity by receiving pressure applied by pedestrians traveling on a playground, park, or walkway, and the generated electricity can be charged and used as a power source for various energy sources (e.g., power supplied to streetlights, traffic lights, etc.). The present invention comprises: an elastic floor unit installed on a road surface of a playground or walkway; a piezoelectric power generation unit buried in the ground to be disposed below the elastic floor unit and having a piezoelectric cell generating electricity by pressure applied downwards; and a piezoelectric cell pressing unit installed above the piezoelectric cell and operated under pressure applied by pedestrians moving on the elastic floor unit to press the piezoelectric cell such that the piezoelectric cell generates electricity. The piezoelectric cell pressing unit comprises: a piezoelectric cell pressing part provided on a lower surface of the elastic floor unit, installed on an upper surface of the piezoelectric cell, and operated to press the piezoelectric cell upon application of a load by a pedestrian moving on the elastic floor unit, so as to cause the piezoelectric cell to generate electricity; and a vibration generating part installed to protrude downwardly from the piezoelectric pressing part and, when the piezoelectric cell is pressed by the operation of the piezoelectric pressing part, generating vibrations in the piezoelectric cell to increase the capacity of electricity generated in the piezoelectric cell.

Description

Piezoelectric generator applied to resilient flooring}

The present invention relates to a piezoelectric power generation device applied to an elastic flooring material, and more particularly, by burying a piezoelectric power generation unit in the ground to generate electricity by receiving pressure from a pedestrian moving on a playground, park, or walking trail, It can be charged with electricity and used as a power source for various energy sources (eg, power supply for streetlights, traffic lights, and indicator lights notifying danger), as well as making the piezoelectric vibrate to increase the amount of electricity generated. Applied to elastic flooring It is about a piezoelectric generator.

In general, generators that generate electricity generate electricity by generating electromotive force through electromagnetic induction, and to construct a generator, a magnet for creating a magnetic field and a conductor for generating electromotive force are required. One is stationary and the other moves to generate electricity.

That is, there is a rotating field type in which the conductor is stationary and the magnetic field rotates and a rotating armature type in which the magnetic field is stationary and the conductor rotates. The magnitude of (electromotive force) can be adjusted, and hundreds to thousands of V can be obtained by connecting conductors in series so that the electromotive force is added.

However, conventional generators require a separate power source to generate electricity, and require a separate energy source, such as fuel or water, to provide this power source, and pollutants, For example, there is a problem of polluting the environment by generating combustion gas or the like.

On the other hand, elastic flooring is installed on the road surface of playgrounds, parks, and trails. The resilient flooring material has a high shock absorption rate to minimize shock to prevent safety accidents, reduce a comfortable walking feeling and fatigue, prevent slipping with special materials and have excellent soundproofing effects, and have low thermal conductivity, so that snow melts quickly in winter, and is made of rubber. It is simple and convenient to install, creates a beautiful appearance with various colors and designs, has excellent durability by minimizing shape changes, etc. Radiant heat generation in summer can be minimized.

These resilient flooring materials do not perform any other functions other than simply shock absorption.

In addition, most of the current generators that produce electricity use wind power, water power, thermal power, etc., but these power generation facilities are large facilities, and excessive costs are required to build or operate these facilities.

In addition, streetlights are installed at night to prevent various accidents and crimes. Most of the electricity used for such streetlights uses electricity provided from existing power generation facilities, so a lot of cost is required for streetlight installation and operation. am.

Republic of Korea Patent No. 10-1345562 Republic of Korea Patent Publication No. 10-2011-0017142

The present invention has been made to solve the problems of the prior art, and an object of the present invention is to bury a piezoelectric power generation unit in the ground to generate electricity by receiving pressure from a pedestrian moving on a playground, park, or trail. , To provide a piezoelectric power generation device applied to elastic flooring that can be used as a variety of energy sources (for example, power supply to lamps indicating the danger of street lights and traffic lights) by charging the generated electricity.

Another object of the present invention is to provide a piezoelectric power generation device applied to an elastic floor material capable of increasing electricity generation by generating vibrations in a piezoelectric body in a piezoelectric power generation unit.

The present invention for achieving the above object consists of an extruded foam sheet installed on a road surface of a playground or a walking trail, wherein the extruded foam sheet has a particle size of 500 μm or less per 100 parts by weight of thermoplastic elastomer (TPE) Vulcanized rubber 250 parts by weight of powder, 150 parts by weight of unvulcanized EPDM rubber (ethylene propylene diene monomer rubber), 100 parts by weight of polyolefin, 100 parts by weight of mineral oil, 200 parts by weight of calcium carbonate, and 10 parts by weight of a foaming agent. The composition for extrusion includes 30 parts by weight of a pigment, 3 parts by weight of a UV stabilizer, or 2 parts by weight of an antioxidant per 100 parts by weight of a thermoplastic elastomer (TPE), and the thermoplastic elastomer (TPE) is a SBS block copolymer. (styrene-butadiene-styrene block copolymer), olefin block copolymer, or polyolefin elastomer, and the olefin block copolymer is made of ethene-octene block copolymer wherein the polyolefin is made of polyethylene or polypropylene, the mineral oil is made of liquid paraffin, and the foaming agent is made of azodicarbonamide or sodium bicarbonate; A piezoelectric power generation unit buried in the ground to be disposed under the elastic flooring unit and provided with a piezoelectric body generating electricity by a pressure applied downward; It is installed on the upper part of the piezoelectric body to generate electricity in the piezoelectric power generation unit, and is provided on the bottom surface of the elastic flooring unit to press the piezoelectric body while operating by receiving pressure from a pedestrian moving the elastic flooring unit. A piezoelectric pressing unit comprising a piezoelectric pressing unit installed on top of the piezoelectric unit to generate electricity in the piezoelectric power generation unit by operating the piezoelectric unit to pressurize the piezoelectric unit when a load applied by a pedestrian moving the elastic flooring unit is applied; and a vibration generating unit which is installed to protrude below the piezoelectric pressing unit and generates vibration in the piezoelectric unit to increase the capacity of electricity generated from the piezoelectric unit when the piezoelectric unit is pressed by the operation of the piezoelectric unit, , The piezoelectric pressing unit: an upper pressing member installed in close contact with the bottom surface of the resilient flooring unit, and installed below the upper pressing member, the upper pressing member is installed to be inserted into the inside to be lowered by the upper pressing member A lower pressing member that presses the piezoelectric body while operating, and a restoring force that can be restored after the upper pressing member and the lower pressing member are pressed by a pedestrian moving the elastic flooring unit installed below the lower pressing member. It is made of a spring, the upper end surface of the upper pressing member is made of a curved portion formed to protrude upward, and a concave groove is formed on the bottom surface of the elastic flooring unit so that the curved portion is in contact with the concave groove. The curved portion is installed to engage , The depth of the concave groove is formed to be concave by a depth corresponding to a thickness of more than half of the total thickness of the resilient flooring unit, and the inner circumferential surface of the lower pressing member and the outer circumferential surface of the upper pressing member are installed in close contact with the inclined portion. An outer surface inclined portion is formed on the outer circumferential surface of the upper pressing member to have an inclined state of upper and lower narrowing based on the cross section, so that the pressing force by the upper pressing member can be increased in the lower pressing member, and the outer surface inclined portion is formed. Corresponding to the surface inclined portion, an inner surface inclined portion is formed on the inner circumferential surface of the lower pressing member to have an inclined state of upper and lower sides with respect to the cross section, so that the outer surface inclined portion of the upper pressing member presses the lower pressure member. A pressing force increasing unit that presses while being in close contact with the inclined portion of the inner surface of the member to increase the pressing force by the inclined portion, wherein the vibration generating unit: is installed to protrude from the lower part of the upper pressing member, and one end thereof presses the upper part. The piezoelectric body is fixed to a member and the other end is installed in the form of a cantilever in an unsupported state to have a predetermined tension and pass through the piezoelectric body. It consists of a vibration generating protruding bar for generating vibration, and a vibration generating protrusion for generating vibration in the piezoelectric body by forming irregularities along the longitudinal direction on the outer surface of the vibration generating protruding bar and generating vibration in the piezoelectric body. The piezoelectric body is formed with a vibration generating groove portion having an outer opening so that the vibration generating protruding bar can be installed therethrough, and the piezoelectric body having the vibration generating groove portion is installed in multiple layers in at least one number, and the outside of the elastic flooring unit is formed. On the surface, MMA resin or water-soluble resin mixed with non-slip particles of any one of silica sand, aluminum oxide, silicon carbide, and ceramic aggregate is applied to form an anti-slip layer, and on the lower surface of the extruded foam sheet constituting the elastic flooring unit It is preferable that a plurality of grooves repeated in a lattice form are formed, and a plurality of protrusions or curves are formed on the upper surface.

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According to the piezoelectric power generation device applied to the resilient flooring material according to the present invention, a piezoelectric power generation unit is buried in the ground to generate electricity by receiving pressure from a pedestrian moving on a playground, park, or trail, thereby charging the generated electricity It has the effect of being able to be used as a variety of energy sources (for example, power supplied to streetlights, traffic lights, and indicator lights notifying danger).

In addition, the present invention has an effect of increasing the amount of electricity generated by applying a vibrating force to a piezoelectric body that operates to generate electricity in a piezoelectric power generation unit.

In addition, the present invention has an effect that an anti-slip layer is formed on the outer surface of the resilient flooring material to prevent the pedestrian from slipping when moving even when the road surface is wet due to rain or the like, and to promote safety.

1 is a diagram schematically showing a piezoelectric generator applied to an elastic flooring according to the present invention;
2 is a view showing a piezoelectric pressing unit and a vibration generating unit provided in a piezoelectric generator applied to an elastic flooring according to the present invention;
3 is a view showing an example in which piezoelectric plates are installed in multiple layers in FIG. 2;
4 is a view showing an example of a vibration generating groove formed in a piezoelectric body.

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

Prior to the description of the present invention, the following specific structural or functional descriptions are only exemplified for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms, , should not be construed as being limited to the embodiments described herein.

In addition, since embodiments according to the concept of the present invention can be made with various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and should be understood to include all modifications, equivalents or substitutes included in the spirit and scope of the present invention.

In addition, the configurations of the present invention are to be interpreted in the same range as not only direct contact or connection, but also contact or connection through other configurations between configurations.

1 is a diagram schematically showing a piezoelectric generator applied to an elastic flooring material according to the present invention, and FIG. 2 shows a piezoelectric pressure unit and a vibration generating unit provided in a piezoelectric generator applied to an elastic flooring material according to the present invention. FIG. 3 is a view showing an example in which piezoelectric plates are installed in multiple layers in FIG. 2, and FIG. 4 is a view showing an example of a vibration generating groove formed in a piezoelectric body.

As shown in these drawings, the piezoelectric generator applied to the elastic flooring according to the present invention preferably includes an elastic flooring unit 100.

The resilient flooring unit 100 is installed on the road surface of a playground or a walkway to have a shock absorbing function to protect moving pedestrians, and the resilient flooring unit 100 will be described later.

As shown, the piezoelectric power generation device applied to the resilient flooring according to the present invention preferably includes a piezoelectric power generation unit 200.

The piezoelectric power generation unit 200 is buried in the ground so as to be disposed under the elastic flooring unit 100, and it is preferable to have a piezoelectric body 210 generating electricity by pressure applied downward, the piezoelectric body A configuration for generating electricity by the conventional technology may be used.

As shown, the piezoelectric generator applied to the elastic flooring according to the present invention preferably includes a piezoelectric pressing unit 300.

The piezoelectric pressing unit 300 is installed on top of the piezoelectric unit 210 to generate electricity in the piezoelectric power generation unit 200, while operating by receiving pressure from a pedestrian moving the elastic flooring unit 100, the piezoelectric unit ( 210) is preferably installed to pressurize.

Preferably, the piezoelectric pressing unit 300 includes a piezoelectric pressing unit 310 and a vibration generating unit 400 .

The piezoelectric pressing unit 300 is provided on the bottom surface of the elastic flooring unit 100, is installed on the upper part of the piezoelectric material 210, and when a load by a pedestrian moving the elastic flooring unit 100 acts, the piezoelectric material ( 210) is preferably installed to generate electricity in the piezoelectric power generation unit 200 by operating to pressurize it.

The piezoelectric pressing unit 310 is installed in the lower part of the upper pressing member 312 and the upper pressing member 312 closely attached to the bottom surface of the elastic flooring unit 100, the upper pressing member 312 It is preferable to include a lower pressing member 314 installed to be inserted into the inside and pressurizing the piezoelectric body 210 while operating downward by the upper pressing member 312.

In addition, the inner circumferential surface of the lower pressing member 314 and the outer circumferential surface of the upper pressing member 312 are installed in close contact with the inclined portion, so that the pressing force by the upper pressing member 312 can be increased in the lower pressing member 314. The upper pressing member 312 and the lower pressing member 314 are pressed by a pedestrian moving the elastic flooring unit 100, which is installed at the bottom of the pressing force increasing unit 316 and the lower pressing member 314. It is preferable that a spring 318 to have a restoring force that can be restored later is installed.

At this time, the pressing force increasing portion 316 includes an outer surface inclined portion 316a formed to have an inclined state of upper and lower narrows based on the cross section on the outer circumferential surface of the upper pressing member 312, and the outer surface inclined Corresponding to the portion 316a, it is preferable to include an inner surface inclined portion 316b formed on the inner circumferential surface of the lower pressing member 314 to have an inclined state of upper and lower sides with respect to the cross section.

Therefore, the pressing force increasing unit 316 applies pressure while the outer inclined portion 316a of the upper pressing member 312 is in close contact with the inner inclined portion 316b of the lower pressing member 314, and the pressing force is applied by the inclined portion. this can be increased. That is, when the upper pressing member 312 is operated downward, the pressing force to press the lower pressing member 314 is caused by the wide surface contact between the outer inclined portion 316a and the inner inclined portion 316b. The pressing force increases.

In addition, the upper end surface of the upper pressing member 312 is preferably made of a curved portion 312a formed to protrude upward, and the bottom surface of the elastic flooring unit 100 to contact the curved portion 312a has a concave groove ( 102) is formed, and it is preferable that the curved portion 312a is installed to be engaged with the concave groove 102.

At this time, the depth of the concave groove 102 is preferably formed to be concave by a depth corresponding to half the thickness with respect to the total thickness of the elastic flooring unit 100.

In this way, the upper surface of the upper pressing member 312 is formed as a curved portion 312a and is installed in a form inserted into the elastic flooring unit 100 so that the pedestrian moving the elastic flooring unit 100 When the curved portion 312a is stepped on, the upper pressing member 312 is pressed and has a pressing force that operates downward, so that the piezoelectric power generation unit 200 can generate electricity.

In addition, the vibration generating unit 400 is installed to protrude below the piezoelectric pressing unit 310, and when the piezoelectric unit 210 is pressed by the operation of the piezoelectric pressing unit 310, electricity generated from the piezoelectric unit Preferably, it is installed to generate vibration in the piezoelectric body 210 to increase capacity.

In the vibration generating unit 400, a vibration generating protruding bar 410 is installed so as to protrude downward from the upper pressing member 312, and one end of the vibration generating protruding bar 410 is attached to the upper pressing member 312. When the piezoelectric body 210 is pressurized by the operation of the piezoelectric pressing unit 310 when it is installed to penetrate the piezoelectric body 210 and has a predetermined tension in the form of a cantilever with the other end being unsupported, Vibration may be generated in the piezoelectric body 210 by the tension of the cantilever.

At this time, wave-shaped irregularities are formed on the outer surface of the vibration generating protruding bar 410 along the longitudinal direction, and the irregularities generate vibration in the piezoelectric body 210 to generate vibration in the piezoelectric body 210. It is preferable that protrusions 412 are formed.

The vibration generating protrusion 412 may be formed in the above-described waveform shape or may be formed in a rake shape. That is, the vibration generating protrusion 412 may have a shape that can be hit so that the vibration generating protruding bar 410 can vibrate the piezoelectric body 210 while passing through the piezoelectric body 210 .

In addition, it is preferable that a vibration generating groove 220 is formed in the piezoelectric body 210 so that the vibration generating protruding bar 410 can be installed therethrough. it is desirable to be

In this way, the vibration generating protrusion 412 formed on the vibration generating protruding bar 410 is formed in the form of opening the outside of the vibration generating groove 220 by the tension of the vibration generating protruding bar 410 to the piezoelectric body. (210) can vibrate. That is, while the wave-like irregularities cross over the end of the vibration generating groove 220 , vibration is generated in the piezoelectric body 210 .

Meanwhile, the piezoelectric body 210 through which the vibration generating protruding bar 410 penetrates may be installed in multiple layers in the number of at least one. In this way, when the piezoelectric body 210 is installed in multiple layers, more electricity may be generated. can

As shown, another embodiment of the piezoelectric generator applied to the resilient flooring according to the present invention is the resilient flooring unit 100 installed on the road surface of the playground or trail, and disposed below the resilient flooring unit 100. A piezoelectric power generation unit 200 buried in the ground and equipped with a piezoelectric body 210 generating electricity by a pressure applied downward, connected to the piezoelectric power generation unit 200, and the piezoelectric power generation unit ( 200) electrically connects the charging unit 500 that collects and charges the electricity generated, the charging unit 500 and the piezoelectric power generation unit 200, and the electricity generated by the piezoelectric power generation unit 200 An electric circuit unit having a connector 502 for connecting to an external device so that the charging unit 500 can be charged and the electricity charged in the charging unit 500 can be output to the outside ( 600), and the piezoelectric power generation unit 200 is installed on top of the piezoelectric body 210 to generate electricity, while operating by receiving pressure from a pedestrian moving the elastic flooring unit 100, the piezoelectric body 210 ) It is preferable to include a piezoelectric pressing unit 300 for pressing. Here, the piezoelectric pressing unit 300 preferably has the same configuration as the piezoelectric pressing unit described above.

In addition, the electric circuit unit 600 is preferably further provided with a rectification unit 610 for rectifying electricity generated from the piezoelectric power generation unit 200 .

As shown, the elastic flooring unit 100 applied to each embodiment of the present invention is preferably made of an extruded foam sheet.

The extruded foam sheet is preferably composed of an olefin-based material with strong weather resistance and heat resistance so as to withstand long-term weather and friction with pedestrians. Specifically, the extruded foam sheet includes 250 parts by weight of vulcanized rubber powder, 150 parts by weight of unvulcanized EPDM rubber (ethylene propylene diene monomer rubber), 100 parts by weight of polyolefin, and 100 parts by weight of mineral oil per 100 parts by weight of thermoplastic elastomer (TPE). Part, it is preferably composed of a composition for extrusion of 200 parts by weight of calcium carbonate, and 10 parts by weight of a foaming agent.

At this time, thermoplastic elastomer (TPE) is an elastomer physically crosslinked without vulcanization, and is also referred to as thermoplastic rubber. Thermoplastic elastomer (TPE) is a block copolymer mainly composed of a soft segment of a rubber component and a hard segment of a resin component. The thermoplastic elastomer imparts moldability when molded into a sheet form, provides strong adhesion, and imparts shock absorption characteristics to the final elastic flooring material. The thermoplastic elastomer used in the present invention is SBS block copolymer (styrene-butadiene-styrene block copolymer), olefin block copolymer (olefin block copolymer), or polyolefin elastomer.

The olefin block copolymer is preferably a block copolymer of ethene and α-olefin, more preferably an ethene-octene block copolymer (specifically, a block copolymer of ethene and 1-octene), commercial products include Dow and INFUSE™ from The Dow Chemical Company, US. In addition, the polyolefin elastomer is a homogeneously branched copolymer of ethene and α-olefin, and examples of α-olefin include 1-butene, 1-hexene, 4-methyl-1-heptene, 1-octene, 1-nonene, 1 -decene, etc., and commercial products include ENGAGE™ of The Dow Chemical Company (US).

In addition, unvulcanized EPDM rubber (ethylene propylene diene monomer rubber) is an elastomer that mainly imparts elasticity to elastic flooring materials. It is a terpolymer (three-component polymeric material) containing a lot of double bonds obtained by three-component copolymerization by adding three components. Unvulcanized EPDM rubber is chemically stable, and vulcanized rubber shows intermediate properties between natural rubber and SBR in physical properties.

In this embodiment, the composition for extrusion preferably further includes 30 parts by weight of a pigment, 3 parts by weight of a UV stabilizer, or 2 parts by weight of an antioxidant per 100 parts by weight of a thermoplastic elastomer (TPE).

Polyolefin is a component that mainly imparts weather resistance and heat resistance to resilient flooring materials and moldability when molded into a sheet form, and the type is not greatly limited as long as it is commonly used or known, and is commercially available and molded into a sheet form. Considering the nature, it is preferable to be composed of at least one selected from polyethylene or polypropylene, and more preferably high-density polyethylene.

Vulcanized rubber powder is a component that imparts high elasticity and excellent shape stability to resilient flooring, and is preferably vulcanized EPDM rubber (ethylene propylene diene Monomer rubber) powder, considering the physical properties of the resilient flooring and mixing with other components. Considering the environmental aspects of resource recycling, etc., it is more preferable that the vulcanized EPDM rubber (ethylene propylene diene monomer rubber) powder is waste vulcanized EPDM rubber (ethylene propylene diene monomer rubber) powder. In consideration, it is preferable that the particle size of the vulcanized EPDM rubber (ethylene propylene diene monomer rubber) powder is 500 μm or less (for example, 10 to 500 μm). In addition, considering all of the above characteristics, it is preferable that the surface of the vulcanized EPDM rubber (ethylene propylene diene monomer rubber) powder has a microporous pore structure. Vulcanized EPDM rubber (ethylene propylene diene monomer rubber) powder having a particle size of 500㎛ or less and a microporous pore structure on the surface is finely pulverized from waste vulcanized EPDM rubber (ethylene propylene diene monomer rubber) scrap using a high-temperature shear grinding method. .

Mineral oil acts as a softener or processing oil to make molding and processing easier by giving flexibility to synthetic rubber and increasing its plasticity. oil obtained from The type of mineral oil is not significantly limited as long as it is commonly used or known, and is preferably liquid paraffin in consideration of compatibility with other components and ease of handling. Liquid paraffin refers to a tasteless, odorless, colorless and transparent oily or white oil obtained by highly refining relatively low-viscosity dewaxed oil.

Calcium carbonate acts as a reinforcing agent to increase the strength of the resilient flooring material, and preferably has a particle size of 10 μm or less in consideration of compatibility with other components, processability, and moldability. Calcium carbonate used in the present invention is preferably a commercial product provided in the form of refined marble, limestone, calcite, and shells in consideration of economic feasibility.

A foaming agent is a component that foams when extruded into a sheet form to mold a sheet into a foam form and thereby imparts elasticity and heat resistance to the sheet. Considering compatibility, commercial availability, foamability, etc., it is preferably composed of at least one selected from azodicarbonamide or sodium bicarbonate, and azodicarbonamide is preferred. more preferable

The pigment is a component that imparts a beautiful appearance to the upper sheet constituting the resilient flooring material, and the type is not greatly limited as long as it is commonly used or known, and includes, for example, blue pigments and red pigments.

UV stabilizers and antioxidants are components that prevent the resilient flooring material from being aged or oxidized by ultraviolet rays, oxygen, etc. when the elastic flooring material is exposed to sunlight, air, moisture, etc. for a long time. not very limited The UV stabilizer has a function of blocking or absorbing UV rays, and is preferably a HALS-based material in consideration of its performance as a UV stabilizer and compatibility with other components. Hals (Hindered Amine Light Stabilizer, HALS) refers to a material in which an amine group is surrounded by a three-dimensional structure and is used as a light stabilizer.

In an embodiment of the present invention, a plurality of grooves repeated in a lattice shape may be formed on the lower surface of the extruded foam sheet, and a plurality of protrusions or curves may be formed on the upper surface of the extruded foam sheet.

In addition, an anti-slip layer may be further formed on the outer surface of the elastic flooring unit 100 according to an embodiment of the present invention. The anti-slip layer may be formed by applying MMA resin or water-soluble resin mixed with non-slip particles selected from silica sand, aluminum oxide, silicon carbide, and ceramic aggregate.

Therefore, as some of the non-slip particles protrude on the outer surface of the elastic flooring unit 100, it is possible to prevent a safety accident in advance by preventing a pedestrian from slipping while moving.

The reason why silica sand, aluminum oxide, silicon carbide, and ceramic aggregate are used as non-slip particles of the anti-slip layer is that they have excellent strength and hardly wear out even when used for a long time.

In addition, it is preferable to use MMA resin or water-soluble resin as the resin mixed with the non-slip particles. Water-soluble resins are environmentally friendly because they do not emit odors or harmful substances when applied. In addition, MMA resin has a fast drying time, so pedestrians can move about 30 minutes after application, and it has excellent abrasion resistance, durability, washability, and anti-slip properties, as well as no whitening powder phenomenon, so there is no harm to the environment and human body. .

Therefore, since the whitening powder phenomenon does not occur, there is an advantage that it is harmless to the environment and human body. At this time, by mixing the fluorescent material with the resin, it can be configured to be easily recognized by pedestrians at night.

According to the present invention, by burying a piezoelectric power generation unit in the ground to generate electricity while vibrating under the pressure of a pedestrian's movement, the generated electricity is charged to prevent various energy sources (e.g., street lights, traffic lights, hazards). It can be used as the power supply to the indicator light).

The technical problem of the present invention is achieved by the technical configuration as described above, and although it has been described by the limited embodiments and drawings, it is not limited thereto and the present invention by those skilled in the art to which the present invention belongs Of course, various modifications and variations are possible within the scope of the technical idea of and the scope of the claims to be described below.

100 - elastic flooring unit 102 - concave groove
200 - piezoelectric power generation unit 210 - piezoelectric
220 - Vibration generating groove part 300 - Piezoelectric pressure unit
310 - piezoelectric pressing part 312 - upper pressing member
312a - curved part 314 - lower pressing member
316 - pressing force increasing part 316a - outer surface inclined part
316b - inner surface slope 318 - spring
400 - Vibration generating unit 410 - Vibration generating protruding bar
412 - vibration generating protrusion 500 - charging unit
502 - condenser 520 - electric circuit unit
510 - Rectifier

Claims (15)

It consists of an extruded foam sheet installed on the road surface of a playground or walking trail, and the extruded foam sheet includes 250 parts by weight of vulcanized rubber powder having a particle size of 500 μm or less per 100 parts by weight of thermoplastic elastomer (TPE), unvulcanized EPDM rubber (ethylene propylene diene monomer rubber) 150 parts by weight, polyolefin 100 parts by weight, mineral oil 100 parts by weight, calcium carbonate 200 parts by weight, and a foaming agent 10 parts by weight of a composition for extrusion, the composition for extrusion being a thermoplastic elastomer , TPE) 30 parts by weight of pigment per 100 parts by weight, 3 parts by weight of UV stabilizer, or 2 parts by weight of antioxidant, and the thermoplastic elastomer (TPE) is SBS styrene-butadiene-styrene block copolymer , An olefin block copolymer, or a polyolefin elastomer, and the olefin block copolymer is made of an ethene-octene block copolymer, and the polyolefin is polyethylene or poly An elastic flooring unit 100 made of propylene, the mineral oil is made of liquid paraffin, and the foaming agent is made of azodicarbonamide or sodium bicarbonate;
A piezoelectric power generation unit 200 buried in the ground to be disposed under the elastic flooring unit 100 and provided with a piezoelectric body 210 generating electricity by a pressure applied downward;
The piezoelectric power generation unit 200 is installed on top of the piezoelectric body 210 to generate electricity, and pressurizes the piezoelectric body 210 while operating by receiving pressure from a pedestrian moving the elastic flooring unit 100. , It is provided on the bottom surface of the elastic flooring unit 100, is installed on the top of the piezoelectric body 210, and operates to press the piezoelectric body 210 when a load by a pedestrian moving the elastic flooring unit 100 acts. A piezoelectric pressing unit 300 comprising a piezoelectric pressing unit 310 that generates electricity in the piezoelectric power generation unit 200 by causing; and
It is installed so as to protrude from the lower part of the piezoelectric pressing part 310 so that when the piezoelectric pressing part 310 presses the piezoelectric element 210, the capacity of electricity generated from the piezoelectric element 210 is increased. Including; vibration generating unit 400 for generating vibration in the piezoelectric body 210,
The piezoelectric pressing part 310 is:
An upper pressing member 312 installed in close contact with the bottom surface of the elastic flooring unit 100, and installed below the upper pressing member 312, the upper pressing member 312 is installed so as to be inserted into the upper part The lower pressing member 314 which presses the piezoelectric body 210 while operating downward by the pressing member 312, and the lower pressing member 314 installed below the pedestrian moving the elastic flooring unit 100 It consists of a spring 318 that has a restoring force that can be restored after the upper pressing member 312 and the lower pressing member 314 are pressed and operated by
The top surface of the upper pressing member 312 is made of a curved portion 312a formed to protrude upward, and a concave groove 102 is formed on the bottom surface of the elastic flooring unit 100 so that the curved portion 312a comes into contact with it. The curved portion 312a is installed to be engaged with the concave groove 102, and the depth of the concave groove 102 is formed to be concave by a depth corresponding to more than half the thickness of the total thickness of the elastic flooring unit 100 ,
The inner circumferential surface of the lower pressing member 314 and the outer circumferential surface of the upper pressing member 312 are installed in close contact with the inclined portion so that the pressing force by the upper pressing member 312 can be increased in the lower pressing member 314, An outer surface inclined portion 316a is formed on the outer circumferential surface of the upper pressing member 312 to have an upper and lower inclined state based on the cross section, and corresponds to the outer surface inclined portion 316a, An inner surface inclined portion 316b is formed on the inner circumferential surface of the lower pressing member 314 so as to have an inclined state of upper and lower narrowing based on the cross section, so that the outer surface inclined portion of the upper pressing member 312 is formed. (316a) is pressurized while in close contact with the inner surface inclined portion 316b of the lower pressing member 314 to increase the pressing force by the inclined portion; includes,
The vibration generating unit 400 is:
It is installed so as to protrude from the lower part of the upper pressing member 312, one end is fixed to the upper pressing member 312, and the other end is in the form of a cantilever in an unsupported state to have a predetermined tension and the piezoelectric body 210 A vibration generating protruding bar 410 installed to penetrate through the piezoelectric body and generating vibration in the piezoelectric body 210 by the tension of the cantilever when the piezoelectric body 210 is pressed by the operation of the piezoelectric body pressing part 310; The vibration generating protrusion 412 is formed on the outer surface of the vibration generating protruding bar 410 along the longitudinal direction, and the irregularity generates vibration in the piezoelectric body to generate vibration in the piezoelectric body 210,
A vibration generating groove 220 is formed in the piezoelectric body 210 so that the outside of the vibration generating protruding bar 410 can be installed therethrough,
The piezoelectric body 210 in which the vibration generating groove 220 is formed is installed in a multi-layered manner in at least one number,
An anti-slip layer is formed on the outer surface of the resilient flooring unit 100 by applying MMA resin or water-soluble resin mixed with non-slip particles of any one of silica sand, aluminum oxide, silicon carbide and ceramic aggregate,
A plurality of grooves repeated in a lattice form are formed on the lower surface of the extruded foam sheet constituting the elastic flooring unit 100, and a plurality of projections or bends are formed on the upper surface. piezoelectric generator. delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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