JP2019203301A - Painting floor structure for wireless power supply floor and construction method of the same - Google Patents

Abstract

To provide a painting floor structure for wireless power supply floor which has durability for the travel of an automated guided vehicle (AGV), and which can keep propagation efficiency of power high even in the case of supplying power to the AGV from the floor wirelessly, and to provide the construction method of the same.SOLUTION: In a painting floor structure for wireless power supply, on a floor substrate concrete surface, a metal foil layer having the thickness of equal to or greater than 15 μm and equal to or less than 50 μm is provided. On the metal foil layer, a resin mortar layer comprising epoxy resin, epoxy resin hardener and an aggregate, and having the thickness of 3-7 mm is provided. On the resin mortar layer, a finish coating floor layer having a dielectric loss tangent of equal to or less than 0.05 is provided.SELECTED DRAWING: None

Description

  The present invention relates to a coated floor structure suitable for wirelessly supplying electric power from a floor to an automated guided vehicle (hereinafter referred to as AGV) system installed in a factory or a warehouse, and a method for constructing the coated floor.

  Conventionally, while preventing warping and cracking due to the shrinkage of the coating film without greatly reducing the cure shrinkage, the coating film thickness is 1 to 4 mm while maintaining the heat resistance and physical properties without impairing the coating workability and the surface appearance. Water-based urethane mortar compositions that do not cause warping or cracking of the surface layer even when cured and contracted are often used as coating materials suitable for floors on which AGVs of automatic guided vehicle systems travel, The water-based urethane mortar composition is mainly characterized by an aggregate containing polyester polyol, isocyanate and hydraulic mortar (Patent Document 1).

JP 2006-62950 A

  However, the floor coated with the water-based urethane mortar composition includes a hydraulic mortar that is cured by water in the composition, and the water-based urethane mortar composition after curing is not consumed for hydration of the hydraulic mortar. Since moisture and water of crystallization after hydration are included, for example, when power is supplied wirelessly from the floor to the AGV running on the floor, there is a problem that the power propagation efficiency decreases.

  The problem to be solved by the present invention is for a wireless power feeding floor that has durability in running of AGV and can maintain high power transmission efficiency even when power is supplied to AGV wirelessly from the floor. An object of the present invention is to provide a painted floor structure and a construction method thereof.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a metal foil layer having a thickness of 15 μm or more and 50 μm or less on the floor foundation concrete surface, and an epoxy resin, an epoxy resin curing agent, and bone on the metal foil layer. A coated floor structure for a wireless power feeding floor, comprising a resin mortar layer having a thickness of 3 to 7 mm made of a material, and a finished coated floor layer having a dielectric loss tangent of 0.05 or less on the resin mortar layer. provide.

  According to a second aspect of the present invention, there is provided the floor structure for a wireless power feeding floor according to the first aspect, wherein the finishing floor layer is an epoxy resin floor or a hard urethane resin floor.

  According to a third aspect of the present invention, there is provided the coated floor structure for a wireless power feeding floor according to the first or second aspect, wherein the aggregate of the resin mortar layer is made of cinnabar or selben.

  In the invention according to claim 4, a metal foil layer having a thickness of 15 μm or more and 50 μm or less is adhered to the floor foundation concrete surface, and an epoxy resin and an epoxy resin curing agent are formed on the metal foil layer. A resin mortar made up of 3 and 7 mm is applied to form a resin mortar layer, and a finish flooring material having a dielectric loss tangent of 0.05 or less is applied on the resin mortar layer to obtain a final coated floor layer. A method for constructing a coating floor for a wireless power feeding floor is provided.

  According to a fifth aspect of the invention, there is provided the wireless power feeding floor coating method according to the fourth aspect, wherein the finish coating material is made of an epoxy resin coating material or a hard urethane resin coating material. provide.

  According to a sixth aspect of the present invention, there is provided the method for constructing a coated floor for a wireless power feeding floor according to the fourth or fifth aspect, wherein the aggregate of the resin mortar is made of cinnabar or selben. .

  The painted floor structure for a wireless power feeding floor according to the present invention has an effect that the AGV has durability in traveling, and has a high power propagation efficiency when wirelessly supplying power from the floor to the AGV.

  In addition, the method for constructing a coated floor for a wireless power feeding floor according to the present invention has the effect of forming a floor structure that has durability in AGV traveling and has high power propagation efficiency when wirelessly supplying power to the AGV from the floor. is there.

  The present invention will be described in detail below.

  The metal foil used for the metal foil layer constituting the present invention can be a copper foil, an aluminum foil, a stainless steel foil, an iron foil, etc., and the thickness is preferably 15 μm or more in order to improve the power propagation efficiency. In addition, the thickness is preferably 50 μm or less from the viewpoint of workability when sticking to the foundation concrete. The metal foil layer is used for the purpose of maintaining high power propagation efficiency when power is supplied wirelessly from the floor to the AGV. If the thickness is less than 15 μm, the power propagation efficiency may be reduced. When the metal foil is stuck to the surface of the underlying concrete due to the minute unevenness of the concrete, the power propagation efficiency may be greatly reduced if a defect occurs due to a hole in the metal foil. When the thickness exceeds 50 μm, the workability when the metal foil is stuck to the surface of the underlying concrete becomes insufficient.

  Examples of the epoxy resin in the resin mortar composed of an epoxy resin, an epoxy resin curing agent and an aggregate used for forming the resin mortar layer constituting the present invention include, for example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, and phenol novolac. Type epoxy resin, bisphenol AD type epoxy resin, biphenyl type epoxy resin, naphthalene type epoxy resin, alicyclic epoxy resin, glycidyl ester type epoxy resin, glycidylamine type epoxy resin, heterocyclic epoxy resin, diaryl sulfone type epoxy resin, Hydroquinone type epoxy resins and their modified products can be used alone or in combination.

  Of these epoxy resins, bisphenol A type epoxy resins and bisphenol F type epoxy resins that have low viscosity and are easy to handle are particularly preferred. In order to improve the workability as a resin mortar, 15 to 45 parts by weight of a diluent is added to 100 parts by weight of the epoxy resin. As the diluent, a reactive diluent or a non-reactive diluent can be used, and it can be used in combination.

  Moreover, the reactive diluent is preferable as the diluent from the viewpoint of ensuring durability against repeated running of the high load AGV. Among reactive diluents, monofunctional diluents include allyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, o-cresyl glycidyl ether, t-butylphenyl glycidyl ether, sec-butylphenol monoglycidyl ether, 2 Functionality includes resorcinol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6 hexanediol diglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, hexahydrophthalic acid diglycidyl ester, and multifunctional glycerol Polyglycidyl ether, trimethylolpropane polyglycidyl ether, pentaerythritol polyglycidyl ether, di Lise roll polyglycidyl ether, and sorbitol polyglycidyl ether can be used.

  As the non-reactive diluent, benzyl alcohol, butyl diglycol, pine oil, xylene resin, toluene resin, mineral spirit, kerosene and the like can be used.

  Examples of the epoxy resin curing agent used in the present invention include aliphatic polyamines, modified aliphatic polyamines, polyamide amines, polyamides, alicyclic polyamines, modified alicyclic polyamines, modified aromatic polyamines, and amine compounds such as tertiary amines. For example, polyethylenetetramine, tetraethylenepentamine, diethylaminopropylamine, N-aminoethylpiperazine, isophoronediamine, metaxylenediamine, 2,4,6-trisdimethylaminomethylphenol, etc. can be used. These can be used alone or in combination.

  As for the compounding quantity of the epoxy resin hardening | curing agent with respect to the mixture of an epoxy resin or an epoxy resin and a diluent, it is preferable that the number of active hydrogen groups with respect to the number of epoxy groups will be 0.7-1.3. If it is less than 0.7, the strength of the cured product may be insufficient, and if it exceeds 1.3, the epoxy resin curing agent becomes excessive, and adhesion between the finish coating layer on the resin mortar layer and the resin mortar layer May be insufficient.

  As the aggregate used for the resin mortar used in the present invention, it is preferable to have a high insulating property that does not decrease the power propagation efficiency when supplying power to the AGV wirelessly, and in particular, sand, ceramics, insulators, etc. Serbene obtained by pulverizing ceramics is preferred. The particle size of the aggregate is preferably 0.075 to 0.43 mm for cinnabar, and 0.05 to 1.5 mm for selben. When the particle size of the cinnabar is less than 0.075 mm, the workability when applying the resin mortar is lowered, and when it exceeds 0.45 mm, the strength of the resin mortar layer may be insufficient. When the particle diameter of selben is less than 0.05 mm, workability when applying the resin mortar is lowered, and when it exceeds 1.5 mm, the strength of the resin mortar layer becomes insufficient.

  The amount of the aggregate in the resin mortar is preferably 40 to 80 parts by weight with respect to 100 parts by weight of the epoxy resin or a mixture of an epoxy resin and a diluent and an epoxy resin curing agent. If it is less than 80 parts by weight and more than 80 parts by weight, workability when applying the resin mortar is lowered.

  The resin mortar layer preferably has a thickness of 3 to 7 mm. If it is less than 3 mm, cracking or peeling may occur due to repeated running of AGV, etc., and if it exceeds 7 mm, the smoothness when applying the resin mortar may be insufficient. is there.

  The finished coated floor layer constituting the present invention preferably has a dielectric loss tangent indicating the degree of electric energy loss of 0.05 or less and has durability against repeated AGV running, and particularly has a dielectric loss tangent of 0. If it exceeds .05, the power propagation efficiency when supplying power from the floor to the AGV wirelessly becomes insufficient. Further, the thickness of the finished coated floor layer is preferably 0.5 to 2 mm, and if it is less than 0.5 mm, the durability against running of AGV is insufficient, and if it exceeds 2 mm, the power propagation efficiency may be insufficient.

  As the finish coating floor material having a dielectric loss tangent of 0.05 or less and durability against repeated running of AGV, specifically, JIS K 7215 type D durometer hardness of the coating film shown in this application is 70. The above-mentioned epoxy resin-coated flooring or hard urethane resin-coated flooring can be used. As a general rule, the epoxy resin-coated flooring material is preferably a non-solvent-containing flooring material in which a filler such as calcium carbonate is blended with the epoxy resin and the epoxy resin curing agent. It is applied to a thickness of about 0.8 to 1.5 mm with a hammer or the like and cured to form an epoxy resin coated floor.

  Rigid urethane resin-coated flooring is a flooring that does not contain solvent as a rule and contains fillers such as castor oil polyol, castor oil-modified polyol, metaphenylene diisocyanate, and aluminum hydroxide. It is applied to a thickness of about 1 to 1.5 mm with a hammer or the like and cured to form a hard urethane resin coated floor.

  Hereinafter, it demonstrates concretely in an Example and a comparative example.

[Examples and Comparative Examples]
Copper foil (made by Mitsui Kinzoku Co., Ltd.) with a thickness of 35 μm as a metal foil to be stuck to the floor foundation concrete surface, and SUS304 plain weave mesh (wire diameter 0.06 mm, 150 Mesh, made by Nippon Mesh Industrial Co., Ltd.) for comparison with this. It was used. When sticking copper foil to floor foundation concrete, epoxy resin adhesive Aika Avon E5050 (trade name, main agent: curing agent = 1: 1 (weight ratio), manufactured by Aika Industry Co., Ltd.) is used, and a plain weave mesh made of SUS304 is used. In adhering to the floor foundation concrete surface, the following Joliase JE55HA and B mixed at 100: 40 were used.

As an epoxy resin and an epoxy resin curing agent used for the resin mortar, JOLIES JE55HA (trade name, containing bisphenol A type liquid epoxy resin and C ₁₀ grade alkyl monoglycidyl ether, epoxy equivalent: 280, viscosity 0.5 Pa · s / 23 ° C., manufactured by Aika Kogyo Co., Ltd.) and Joliace JE55H B (trade name, containing modified alicyclic polyamine and modified aliphatic polyamine, active hydrogen equivalent: 112, viscosity 0.1 Pa · s / 23 ° C., manufactured by Aika Industry Co., Ltd.) And the mixing ratio of Jolieth JE55H A and B was 100: 40 by weight. As aggregates of resin mortar, Tohoku cinnabar No. 5 (trade name, particle diameter of 0.106 mm to 0.60 mm), Tohoku cinnabar No. 6 (trade name, particle diameter of 0.075 mm to 0.425 mm), Selben B (particle diameter) 0.5 to 1.5 mm) and Serbene C (particle size 0.05 to 0.5 mm), and the aggregate is a mixture of Tohoku cinnabar No. 5 and Tohoku cinnabar 6 in a weight ratio of 2: 1. Aggregate A was obtained by mixing Selben B and Selben C at a ratio of 2: 1. The blending ratio of the epoxy resin, the epoxy resin curing agent and the aggregate was used by mixing 600 parts by weight of the aggregate with 100 parts by weight of the above-mentioned mixture of Jolieth JE55HA and B.

  Moreover, as a finish coating floor material, a solvent-free epoxy resin coating floor material JOLIETHS JE-20G (coating thickness 1.0mm, a brand name, Aika Kogyo Co., Ltd.) and a hard urethane resin coating floor material Aikapur JJ-103 (Coating thickness 1.2 mm, trade name, manufactured by Aika Kogyo Co., Ltd.) and for comparison with this, a hydraulic urethane resin coated flooring made of a water-based urethane mortar composition, Aikapur Hard JJ-560 (coating thickness) 3.0 mm, trade name, manufactured by Aika Kogyo Co., Ltd.). Solvent-free epoxy resin-coated flooring materials and hard urethane resin-coated flooring materials were applied onto the resin mortar layer to form a finished coating floor layer. When using a hydraulic urethane resin-coated flooring as a finish-coated flooring, it was applied directly on the copper foil without applying the resin mortar.

  Using the above materials, copper foil or SUS304 plain weave mesh was applied to the floor foundation concrete surface in the combinations shown in Table 1, and then a resin mortar was applied to provide a resin mortar layer (None for Comparative Example 3) ), And then, by applying the finish coating floor material and providing the finish coating floor layer, the coating floor structure for the wireless power feeding floor of Examples 1 to 4 and Comparative Examples 1 to 3 was obtained.

[Evaluation items and methods]

[Power transmission efficiency]
A power transmission electrode (made of copper foil) having a length of 150 mm × width of 1800 mm × thickness of 35 μm was laid on the finished coated floor layers of Examples 1 to 4 and Comparative Examples 1 to 3 in Table 1 above to transmit power. The end of the electrode is connected to port 1 of the vector network analyzer MS46122A (manufactured by Anritsu), and the other end is connected to port 2. The copper foil or SUS304 plain weave mesh was shared with the ground of the vector network analyzer, and the power propagation efficiency η _max was calculated from the 2-port S parameter measured by the vector network analyzer by the following formula.
η _max = (| S ₂₁ | / | S ₁₂ |) (K− (K ² −1) ^1/2 )
(K was calculated as follows: K = (1− | S ₁₁ | ² − | S ₂₂ | ² + | S ₁₁ × S ₂₂ −S ₁₂ × S ₂₁ | ² ) / (2 × | S ₁₂ × S ₂₁ |),
S ₁₁ : Ratio of the strength of the signal input from the port 1 and the strength of the signal when the signal is reflected back to the port 1 S ₁₂ : The strength of the signal input from the port 2 and the signal Ratio of signal strength S ₂₁ when transmitted to port 1: Ratio of signal strength input from port 1 and ratio of signal strength when signal transmitted to port 2 S ₂₂ : From port 2 The ratio of the strength of the input signal to the strength of the signal when the signal is reflected back to port 2 η _max is a lossless and optimal matching circuit connected to both ports of the 2-port network. Represents the power transmission efficiency transmitted from port 1 to port 2 at the time.

[Dielectric loss tangent]
A plate-like test body having a thickness of 5 mm × 10 cm × 10 cm was prepared for the resin mortar layer using the above materials, and the finished coated floor layers were thick for Examples 1 to 4 and Comparative Examples 1 and 2. A specimen having a thickness of 1 mm × 10 cm × 10 cm was prepared, and for Comparative Example 3, a specimen having a thickness of 3 mm × 10 cm × 10 cm was prepared. As for the system, for Examples 1 to 4 and Comparative Examples 1 and 2, the resin mortar layer was 5 mm thick, and the final coated floor layer was applied 1 mm thick thereon to give a total thickness of 6 mm. A test body of × 10 cm × 10 cm was produced. Each specimen was prepared at 23 ° C. and cured for 7 days at 23 ° C. Aluminum tape was bonded to the surface and bottom of the test specimen, the series impedance Z was measured with a vector network analyzer MS46122A (manufactured by Anritsu), and the dielectric loss tangent tan δ was calculated by the following equation.
tan δ = | Re {Z} / Im {Z} |
Re {Z} represents the real part of Z, and Im {Z} represents the imaginary part of Z.
In the measurement, the measurement frequency range of 1.56 MHz to 51.56 MHz was measured in increments of 0.05 MHz, and tan δ at 13.56 MHz was defined as the dielectric loss tangent here. In the system of Comparative Example 3, the dielectric loss tangent value of the finish coated floor layer is described in Table 2 as it is.

[Compressive strength]
In accordance with JIS K 6911 5.19 compressive strength, resin mortar or hydraulic urethane resin coated flooring material is cured in a shape of 12.7mm in length × 12.7mm in width × 25.4mm in height and 23 ° C for 7 days Take care. Thereafter, the resultant was compressed at 23 ° C. using an Instron universal material testing machine (Instron) at a loading speed of 1 mm / min, and the compression strength (N / mm ² ) was measured.

[Durometer hardness]
Each of the epoxy resin-coated flooring material, the hard urethane-coated flooring material, and the hydraulic urethane resin-coated flooring material is poured into a 40 mm × 60 mm × 4 mm (thickness) mold and cured. After curing at 23 ° C. for 7 days, the measurement was performed at 23 ° C. using a type D durometer according to JIS K 7215 (plastic durometer hardness).

[Evaluation results]
The evaluation results are shown in Table 2.

[Summary]
In Examples 1 to 4, since the power propagation efficiency is high and the dielectric loss tangent of each layer is 0.05 or less, it is determined that the power propagation efficiency is high when supplying power to the AGV wirelessly from the floor, Further, the compressive strength of the resin mortar layer was 30 N / mm ² or more, and the durometer hardness (type D) as the finished coated floor layer was 70 or more.

Claims (6)

  Provided with a metal foil layer having a thickness of 15 μm or more and 50 μm or less on the floor base concrete surface, and provided with a resin mortar layer having a thickness of 3 to 7 mm composed of an epoxy resin, an epoxy resin curing agent, and an aggregate on the metal foil layer, A coated floor structure for a wireless power feeding floor, comprising a finished coated floor layer having a dielectric loss tangent of 0.05 or less on the resin mortar layer.   2. The floor structure for a wireless power feeding floor according to claim 1, wherein the finishing floor layer is an epoxy resin floor or a hard urethane resin floor.   The coated floor structure for a wireless power feeding floor according to claim 1 or 2, wherein the aggregate of the resin mortar layer is made of cinnabar sand or selben.   A metal foil layer having a thickness of 15 μm or more and 50 μm or less is adhered to the floor base concrete surface to form a metal foil layer, and a resin mortar composed of an epoxy resin, an epoxy resin curing agent, and an aggregate is placed on the metal foil layer. Wireless power feeding characterized by forming a resin mortar layer by coating to ˜7 mm, and applying a finish coating material having a dielectric loss tangent of 0.05 or less on the resin mortar layer to form a finished coating floor layer Construction method for floor coating.   5. The method for constructing a floor for a wireless power feeding floor according to claim 4, wherein the finish coating material comprises an epoxy resin coating material or a hard urethane resin coating material. 6. The method for constructing a coated floor for a wireless power feeding floor according to claim 4, wherein the aggregate of the resin mortar is made of cinnabar or selben.