JP3190562U - Protective cover for painting robot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cover for a painting robot which is excellent in adsorptivity of paint mist and the like and does not tear when the painting robot operates. SOLUTION: A protective cover for a painting robot is made by impregnating a semi-solid composition into a stretchable knitted fabric made by knitting filament yarn made of a synthetic resin and adhering it. The semi-solid composition contains petrolatum, which is preferably composed of white petrolatum or petrolatum. The protective cover 1 covers, for example, the arm portion 21 of the painting robot 2, the painting gun 22, and the like. [Selection diagram] Fig. 1

Description

  The present invention relates to a protective cover for a painting robot that covers a painting robot that performs spray painting of a liquid paint.

  Liquid paint is sprayed onto automobiles, motorcycles, and automobile parts. In general, when spraying a liquid paint, it is desired to obtain a desired color and gloss with a uniform coating thickness. For this purpose, the painting work is performed indoors or in a booth in a clean environment. Furthermore, the paint mist is reduced as much as possible in the room or booth so as not to re-adhere to the object to be coated.

  Here, a painting robot for spraying paint is installed in the painting work place, and paint mist is likely to adhere to the painting robot. The paint adhering to the painting robot falls off and reattaches to the object to be coated, causing a stain and causing a painting error.

  Therefore, conventionally, the main body and arm portion of the painting robot, and the tip of the gun provided at the tip of the arm have been covered with a protective cover sewn with fabric (see Patent Document 1). Since the cloth protective cover is a material that is relatively easy to expand and contract, it can follow the rotation and swinging motion of the robot.

WO2007 / 122717

  However, even if the coating robot was covered with a cloth protective cover, the paint mist could not be sufficiently absorbed. So, for painting robots that can improve the paint mist adsorbability, suppress dropping, and follow the robot operation to prevent tearing of the protective cover while maintaining the advantages of workability and cost. A protective cover was desired.

  This invention is made | formed in view of this situation, and makes it a subject to provide the protective cover for coating robots which is excellent in the adsorptivity of paint mist, and is not torn at the time of a coating robot operation | movement.

  The protective cover for a painting robot according to the present invention is characterized in that a semi-solid composition is impregnated and adhered to a stretchable knitted fabric formed by knit knitting a filament yarn made of a synthetic resin.

  According to the present invention, since the semi-solid composition is adhered to the dough, the slipperiness of the protective cover is increased, dust and the like are less likely to adhere to the protective cover itself, and the dustproof effect is great. Therefore, dust is not brought in when the protective cover is taken into the painting environment such as in a booth, and the cleanness of the painting environment can be maintained.

  Moreover, a semi-solid composition has high compatibility with a coating material. For this reason, the amount of absorption of the mist-like paint that floats in the paint environment is greatly increased, and the purification of the paint environment can be dramatically improved. Further, the attached paint is difficult to drop off, and the paint environment can be maintained at a high cleanliness.

  In addition, because of the slipperiness of the semi-solid composition, friction due to contact between the protective cover and the surface of the painting robot is suppressed, and the painting robot can move smoothly, such as rocking, rotating, and linear motion, and the paint can be further improved. Dropping out of is suppressed.

  The fabric is made of a stretchable knitted fabric. For this reason, the protective cover follows the operation of the robot flexibly and is not easily torn. Therefore, the number of replacements can be reduced, and the maintenance cost of equipment during painting can be reduced as a whole.

  Since the protective cover for a painting robot of the present invention has a semi-solid composition impregnated and adhered to the fabric, it has excellent adsorptivity for paint mist and the like and is not easily broken when the painting robot operates.

It is a perspective view of a painting robot covered with a protective cover according to the present invention. It is a perspective view of the protective cover which concerns on this invention. It is sectional drawing of the filament which comprises the cloth | dough of the protective cover which concerns on this invention.

  As shown in FIG. 1, a protective cover 1 for a painting robot according to the present invention is used by coating the surface of a painting robot 2. Among the painting robots 2, it is preferable to cover an arm portion 21 protruding from the main body portion 20 and a coating gun (gun) 22 which is a paint blowing portion at the tip of the arm. This is because, among the painting robot 2, the arm portion 21 and the painting gun (gun) 22 are particularly portions where the paint mist easily adheres. The arm portion 21 and the coating gun 22 are portions that swing and rotate, but the protective cover 1 is composed of a flexible knit fabric that is rich in elasticity, and may be torn by these movements. There is no. In FIG. 1, the arm portion 21 is covered with three protective covers 1 with the joint portions 25 and 26 interposed therebetween, but the arm portion 21 as a whole may be covered with one protective cover 1. An expandable bellows portion 23 is interposed between the arm portion 21 and the coating gun 22. For this reason, it is better not to cover the bellows portion 23 with the protective cover 1.

  As shown in FIGS. 1 and 2, the protective cover 1 may have a shape along the surface shape of the painting robot 2, for example, a cylindrical shape. When the coating robot 2 is operated, the protective cover 1 can be prevented from being caught by the arm portion 21 and the like, and there is no obstacle to spraying the paint onto the object to be coated.

  The fabric is a knitted fabric knitted with filament yarn. The knitted fabric is preferably a tentacle knitting in which S / Z twists are alternately knitted. The filament yarn may be a multifilament in which a plurality of filaments are bundled into one yarn, but may be a monofilament in which one filament is a single yarn. The filament yarn is made of a synthetic fiber, and for example, a thermoplastic synthetic resin such as nylon, polyester, polypropylene, acrylic, or vinylon can be used. Among these, nylon and polyester are preferable in terms of properties such as strength and stretchability.

  The fabric may be seamless and knitted into a cylindrical shape, or may be one obtained by appropriately cutting and sewing a seamlessly knitted cylindrical fabric. For example, as shown in FIG. 2, when the diameter of the protective cover 1 changes in the longitudinal direction, the seamless cylindrical fabric is cut into a flat surface, cut into a predetermined size, and then the longitudinal side 1a. They may be sewn together, or the end portions 1b in the transverse direction may be sewn together to be integrated.

  The protective cover for a painting robot is formed by impregnating a semi-solid composition into a knitted fabric. As shown in FIG. 3, it is preferable that the semi-solid composition 3 not only adheres to the surface of the filament 4 of the filament yarn constituting the fabric, but also impregnates the inside. In this case, it is possible to prevent the semi-solid composition from reliably attaching to the dough and falling off from the dough.

  The semi-solid composition is, for example, an ointment-like substance and has a property of spreading into a thin film when applied to a dough. The semi-solid material may be attached to both the front and back surfaces of the dough, or may be attached only to the front surface.

  The amount of the semi-solid composition attached to 100 parts by mass of the dough is preferably 10 to 100 parts by mass, and more preferably 25 to 75 parts by mass. In this case, the paint is easily adsorbed, and the paint can be prevented from falling off. In addition, when the adhesion amount of a semisolid composition exceeds 100 mass parts, the adsorption amount of a coating material is saturated and the effect corresponding to it cannot be expected.

  The semi-solid composition may be an amorphous ointment-like substance separated from petroleum, and preferably consists of, for example, petrolatum. Petrolatum is a mixture of hydrocarbons consisting mostly of paraffin. Petrolatum is highly compatible with oil-based paints and water-based paints, and particularly highly compatible with oil-based paints. For this reason, it is easy to adsorb the oil-based paint mist, and can also prevent dropping. In addition, although polyethylene glycol may be adhered to the cloth as a semi-solid composition, the adhesion of the coating is lower than that of petrolatum or petrolatum. In particular, petrolatum and petrolatum are more compatible with oil-based paints than polyethylene glycol. For this reason, petrolatum and petrolatum with high adhesion of oil-based paints are preferable as a semi-solid composition to be adhered to the dough.

  The petrolatum of the semi-solid composition used in the present invention is an oily semi-solid wax. can give. Among these, white petrolatum or petrolatum having a high degree of purification is more preferable from the commercial value. Examples of white petrolatum or petrolatum include PROTOPET manufactured by Sonebon, White Petrolatum manufactured by Penleco, and the like.

  Among petrolatum, petrolatum is particularly unscented and non-irritating. In addition, it will not be spoiled by sunlight or moisture. For this reason, workability is good and a protective cover can be used over a long period of time. In addition, since the paint that has adhered to the protective cover becomes non-drying, the petroleum jelly does not fall off and does not adhere to the robot, and is absorbed by the protective cover. It can be effectively suppressed.

  The melting point of petrolatum is preferably 30 to 80 ° C, preferably 30 to 65 ° C, and more preferably 38 to 60 ° C.

  As a method for adhering petrolatum to the dough, for example, it is preferable to disperse and emulsify petrolatum in water, impregnate the dough into the dough, and then evaporate water to adhere only petrolatum to the dough. In this case, petrolatum can be attached to the dough without using an organic solvent. Therefore, the work environment is good and the burden on the worker can be reduced. Prior to impregnation with the liquid material, the fabric is preferably already cut and sewn. The semi-solid composition is preferably formed by emulsifying white petrolatum or petrolatum with water and a surfactant to form an emulsion liquid, impregnating the emulsion liquid into the knitted fabric, and then drying.

  In order to disperse and emulsify petrolatum in water, it is advisable to heat the petrolatum to its melting point (for example, 30 ° C.) or higher and add and mix an appropriate surfactant therein. It is preferable to add and disperse and emulsify with a stirrer such as a homomixer or a homogenizer. Thereby, petrolatum is sufficiently mixed with water, and petrolatum can be uniformly impregnated and adhered to the dough.

  As the surfactant, an anionic surfactant or a nonionic surfactant is used alone or in combination. Specific examples of anionic surfactants include higher alcohol sulfate salts such as sodium lauryl alcohol sulfate and sodium oleyl alcohol sulfate, higher alcohol ethylene oxide such as sodium polyoxyethylene lauryl ether sulfate and sodium polyoxyethylene stearyl ether sulfate. Sulfate salts of adducts, sulfonates such as sodium alkylbenzene sulfonate and sodium α-olefin sulfonate, higher alcohol phosphate salts such as disodium oleyl alcohol phosphate monoester, sodium stearyl alcohol phosphate diester, palmitic acid Examples include higher fatty acid salts such as sodium and amine stearate. These anionic surfactants may be used alone or in combination of two or more.

  Specific examples of the nonionic surfactant include sorbitan monopalmitate, sorbitan monooleate, sorbitan fatty acid esters such as sorbitan monostearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monooleate, polyoxyethylene Polyoxyalkylene fatty acid ester acids such as sorbitan monostearate, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyalkylene ethers such as polyoxyethylene stearyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene nonylphenyl Polyoxyalkylene alkyl allyl ethers such as ethers, polyoxyethylene / polyoxypropylene block copolymers, etc. It is. These nonionic surfactants may be used alone or in combination of two or more.

  Moreover, it is preferable that a semi-solid composition consists of a mixture of petrolatum and polyethylene glycol. Polyethylene glycol is a polymer compound (polyether) having a structure in which ethylene glycol is polymerized, and is soluble in water, methanol, benzene, and dichloromethane. Unlike polyethylene glycol, the mixture of petrolactam and polyethylene glycol is highly compatible with both oil-based paints and water-based paints, so that both oil-based paints and water-based paints are easily adsorbed, and can prevent the paint from falling off. .

  When the semi-solid composition is composed of a mixture of petrolatum and polyethylene glycol, the emulsified aqueous petrolatum solution and the polyethylene glycol aqueous solution are mixed together, impregnated with the liquid material, and then the water is evaporated, A mixture with polyethylene glycol is deposited. Prior to impregnation with the aqueous solution, the fabric is preferably cut or sewn.

  The polyethylene glycol dissolved in the aqueous polyethylene glycol solution preferably has a polymerization degree of 200 to 20000. Specifically, for example, polyethylene glycol 200, 300, 400, 600, 1000, 1500, 1540, 4000, 6000, 20000, and the like can be used. Two or more kinds of polyethylene glycol are combined and dissolved in water so that the melting point is 30 to 65 ° C. to obtain an aqueous polyethylene glycol solution.

  The blending mass ratio of petrolatum and polyethylene glycol in the mixture is preferably 20:80 to 80:20, more preferably 40:60 to 60:40. In this case, since the mixture becomes highly compatible with both the oil-based paint and the water-based paint, both the oil-based paint and the water-based paint are easily adsorbed, and the paint can be prevented from falling off.

  A protective cover for a painting robot according to an embodiment of the present invention was manufactured and subjected to various experiments.

  Nylon multifilament 75 denier was used to create a tubular knitted fabric. The fabric is obtained by alternately knitting S / Z twisted yarns and knitting them with a tengu knitting machine. The weaving length of the fabric is 100 wells / 238 mm, the diameter of the cylindrical fabric is 55 cm, and the basis weight is 150 g / m. The fabric was cut and sewn along the shape of the robot arm.

  Meanwhile, an emulsion liquid of a semi-solid composition was prepared. There are three types of emulsion liquid compositions as shown in Table 1.

Each of the emulsion liquids Nos. 1 to 3 was diluted with water. The dilution ratio is a volume ratio of emulsion liquid: water = 7: 3. Each diluted solution was dipped on the dough and passed between crimping rolls to squeeze out the excess. The adhesion amount of the semisolid composition at this time was 100 to 120 parts by mass with respect to 100 parts by mass of the dough. Next, the dough to which the semi-solid composition was adhered was dried for 48 hours in an indoor hanging device. The amount of the semi-solid composition deposited after drying and immediately before coating with the robot was 60 ± 5 parts by mass with respect to 100 parts by mass of the dough. Thus, a protective cover was produced. The protective covers in which the dough was impregnated with the emulsions Nos. 1, 2, and 3 were referred to as Examples 1, 2, and 3, respectively. Various items of the protective cover of each example were verified as follows. All items were evaluated on a five-point scale.
1. Attaching the protective cover to the arm of the painting robot: The case where it was difficult to attach was set to 1, and the evaluation value was increased as the attachment became easier.
2. Amount of dust adhering to the protective cover immediately before being attached to the painting robot: The case where the amount of dust adhering to the protective cover was large was set to 1, and the evaluation value was raised step by step as the amount of adhering decreased.
3. Paint adsorbing power of protective cover: A protective cover was attached to the arm, and oil paint and water-based paint were sprayed and sprayed on the car body in the booth for top coating. After the coating process was performed for 72 hours and 120 hours, the protective cover was removed, and the amount of the paint adhered to the protective cover was measured. The case where the amount of adhesion was small was set to 1, and the evaluation value was increased as the amount increased.
4). Dropping of paint from protective cover: The amount of paint that had adhered to the protective cover during arm operation was measured. The amount of drop off was set to 1, and the evaluation value increased as the dropout amount decreased.
5. Paint splashing from the protective cover: A paint robot with a protective cover sprayed paint onto the car body in the booth and applied the top coat. The amount of paint mist scattered in the booth during spray painting was measured. The case where the amount of scattering was large was set to 1, and the evaluation value was increased as the amount of scattering decreased.
6). Damage to the protective cover: The protective cover was observed after it was attached to the arm of the painting robot and used for 120 hours. The case where the degree of breakage such as the protective cover tearing was large was set to 1, and the evaluation value was raised as the breakage decreased.

  As a comparative example, a protective cover was prepared without adhering the emulsion liquid to the same knit knitted fabric as in the above example. In this case, the same items were verified. The evaluation results are shown in Table 2.

   As shown in Table 2, compared with the comparative example, the protective covers of Examples 1 to 3 had good attachment properties, were less likely to adhere to dust, had a high paint mist adsorption force, and had less paint fall off. .

  The reason why the protective covers of Examples 1 to 3 are easy to attach is that the protective cover becomes slippery due to the adhesion of the semi-solid composition. In addition, it is difficult for dust to adhere to the protective cover because when the semi-solid composition is adhered to the dough, it is impregnated with the emulsion liquid, and at this time, the dough is scoured (soaping). This is because the slipperiness of the dough increases when the semi-solid composition adheres.

   The reason why the paint mist easily adheres to the protective cover and the paint is less dropped is that the semi-solid composition adhering to the fabric is highly compatible with the paint.

   In the protective covers of Examples 1 and 2, the oil-based paint was easier to adhere than the water-based paint, and the dropout was less. This is because the semi-solid composition adhering to Examples 1 and 2 is petrolatum having high compatibility with oil. Further, in Example 3, since not only petrolatum having good compatibility with oil but also polyethylene glycol having good compatibility with water is used, both oil-based paints and water-based paints are easily adhered, and there is little dropout. It was.

1: protective cover, 2: painting robot, 21: arm part, 22: painting gun.

Claims (3)

A semi-solid composition is impregnated and adhered to a stretchable knitted fabric formed by knit knitting filament yarn made of synthetic resin,
The semi-solid composition contains petrolatum,
The petrolatum is made of white petrolatum or petrolatum, and is a protective cover for a painting robot having excellent paint adsorbability.   2. The coating robot according to claim 1, wherein the semi-solid composition is formed by emulsifying white petrolatum or petrolatum with water and a surfactant to form an emulsion liquid, impregnating the emulsion liquid into the knitted fabric, and then drying the emulsion. Protective cover.   The protective cover for a coating robot according to claim 1 or 2, wherein the amount of the semi-solid composition deposited is 10 to 100 parts by mass when the knitted fabric is 100 parts by mass.

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