JPH08277083A - Polishing method for handrail for man conveyor - Google Patents

Abstract

PURPOSE: To provide a polishing method of a handrail for a man conveyor where the working time is greatly reduced, the adhesion of the handrail surface to the coating film is kept, and the coating film to sufficiently keep glossiness is formed on the handrail surface. CONSTITUTION: Discoloration and strong stain on the surface of a handrail are removed in Step S1, and the polishing process using the polishing paper of #240-#600 class, preferably #240-#400 class in accordance with R6253 of JIS is achieved. After the chipped powder attached to the handrail surface are removed in Step S2, the coating of ultraviolet ray hardening type is applied to the handrail surface in Step S3. After being left for several minutes, irradiation of the ultraviolet ray is achieved to harden the coating of the ultraviolet hardening type in Step S4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for polishing a handrail for a passenger conveyor.

[0002]

2. Description of the Related Art Generally, a handrail for a man conveyer has a strength member such as cotton canvas or steel cord and a surface material such as chlorosulfonated polyethylene as disclosed in JP-A-55-56977. Since the surface material of chlorosulfonated polyethylene is expensive, it is possible to obtain an aesthetic appearance excellent in colorability.

FIG. 2 is a schematic diagram showing a general handrail for a man conveyer. The handrail 1 of the man conveyer is arranged in an endless manner while being guided by a mold roller 2 and driven by a driving roller 3. Alternatively, it is configured to be driven by the sandwiching pressure between the rollers. This handrail 1 gradually loses its aesthetic appearance with the operation of the man conveyor, and one of the deteriorations in the glossiness is that the user's sweat and hand dust, dust, gum, and tobacco are pressed against each other. This is due to the adhesion of solvent during cleaning, and these may be transferred to the mold roller 2 and retransferred to the handrail 1. Further, in the method in which the handrail 1 is driven by the nip pressure of the rollers, the gloss level is also reduced due to the frictional force during the nip pressure. Further, the original color of the handrail 1 may be faded due to long-term use.

On the other hand, man conveyors are often used in service industries such as department stores, supermarkets, banks, airports, and station buildings, and as a matter of course, much attention is paid to maintaining the aesthetics of man conveyors. Therefore, in a man conveyor such as an escalator where aesthetics are important, even if there is no functional problem, the handrail 1
Handrail 1 when there is a decrease in glossiness and fading
Was sometimes replaced. However, the replacement of the handrail 1 is very expensive and the economic burden is very large.
Conventionally, various methods for regenerating the surface of the handrail 1 having a reduced gloss have been developed.

As a method of regenerating the surface of the handrail, there are a method of washing the surface with a surfactant and an organic solvent, and a method of applying an emulsion of paraffin or silicone oil to give gloss. Since the recovery cannot be expected for stains that have reached a relatively deep depth chemically and physically or have been discolored, as described in JP-A-61-26838, the surface of the handrail 1 cannot be recovered. A urethane film film is formed or a two-layer structure of polyolefin-based paint as described in JP-A-3-79588 is used to improve the adhesion between the handrail surface and the paint, or the handrail surface is Method of polishing and then applying urethane-based paint, acrylic-styrene copolymer-based paint or modified silicone paint and curing to restore gloss It has been proposed.

[0006]

However, according to the conventional method for polishing the handrail, the polishing time is generally (1) the polishing time for the surface of the handrail,
(2) Coating time of coating, (3) Drying and curing time of coating, total of which, surface polishing of handrail is particularly effective for strong stains and discoloration. Although the time can be shortened by roughening the polishing particles and increasing the polishing rate, the handrail surface after polishing has severe irregularities, and it is necessary to cover these irregularities and obtain a film thickness with sufficient gloss. It is necessary to repeat coating 2-3 times or more. Further, with respect to the coating of the coating material, it takes a drying and curing time for each coating, so that the work time becomes long if the coating is repeated. Therefore, in the conventional polishing work, it is necessary to carry out the polishing with a proper roughness and the number of times of overcoating, which makes the working time very long and at the same time the working cost expensive. Further, since the drying and curing time is affected by the outside temperature, it is impossible to work in a low temperature area, for example, Hokkaido in winter.

Many man conveyors are often housed in one building, and as described above, many man conveyors are used in the service industry. The work must be completed within a limited time while the man conveyor is stopped. However, due to the above-mentioned reasons, it is barely possible to complete the polishing work for several machines a day, and it takes a great deal of manpower to complete the polishing work within a limited time. In addition, this is a cause of high work cost.

An object of the present invention is to form a coating film on the surface of the handrail, which significantly reduces the working time, maintains the adhesion between the surface of the handrail and the coating film, and maintains sufficient glossiness. It is to provide a method of polishing a handrail for a man conveyor.

[0009]

In order to achieve the above-mentioned object, the present invention applies a paint to the surface of the handrail after the polishing step of removing stains on the surface of the handrail to be polished, and polishes the surface. In a method for polishing a handrail for a man conveyor to be performed, a polishing step for removing dirt on the surface of the handrail and maintaining adhesion with the coating material, and polishing powder for the surface of the handrail after the polishing step After the removal of the above-mentioned paint, a step of applying an ultraviolet curable paint as the paint to the surface of the handrail and a step of irradiating ultraviolet rays to cure the ultraviolet curable paint.

[0010]

The method of polishing a handrail for a passenger conveyor according to the present invention uses a UV-curable coating as described above and, in consideration of the adhesion of the coating film at the stage of polishing the handrail surface, is rougher than usual. Since the polishing process is included, the drying and curing times are not significantly affected by the ambient temperature,
Not only is it possible to work regardless of the region and season, but it is also possible to significantly reduce the work time while preventing the occurrence of peeling. In particular, the UV curable paint has a very high viscosity.
It is possible to obtain a film thickness having a sufficient glossiness by coating once.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flow chart showing a method of polishing a handrail for a passenger conveyor according to an embodiment of the present invention. First, step S1 is a polishing process of the surface of the handrail as a pretreatment. This is carried out by attaching abrasive paper to an apparatus such as an optical sander or a belt sander as shown in Fig. 3, and in this polishing process, fading and strong dirt on the surface of the handrail are removed, and details are given. As will be described later, when the coating film is finally formed on the surface of the handrail after polishing, the surface is polished to a roughness that maintains the adhesiveness with the coating film. Next, the step performed in step S2 is to remove the shavings adhering to the surface of the handrail. This may be wiped off well with a brush, waste cloth or the like, or may be wiped off with alcohol or the like. Subsequently, in step S3, a step of applying the ultraviolet curable coating material to the surface of the handrail is performed. The coating method is performed by using a spray, a brush or the like, but in the case of an ultraviolet curable coating, one of its characteristics is that it can be used as a solventless type, so it does not matter whether or not it is diluted with a solvent. After the application of the UV-curable coating material, the coating is left for several minutes for the purpose of leveling and volatilization of the solvent in the case of using a solvent, and then, in step S4, an ultraviolet light irradiation step is performed for curing the UV-curable coating material. In step S4 of the step of irradiating the ultraviolet light, any ultraviolet irradiating device having a function of generating ultraviolet light may be used. It is convenient because it can be moved over and irradiated with ultraviolet rays. The above-mentioned work for the existing man conveyor can be performed without removing the handrail from the man conveyor, but since the work for the entire circumference of the handrail cannot be done at one time, the work from step S1 to step S4 is completed. Then, in step S5, the man conveyor is activated to expose the unworked portion of the handrail, and the work of steps S1 to S4 is repeated again to polish the entire circumference of the handrail.

The handrail surface actually polished by the above method has a gloss of 70 ° to 75 °, and cracks and peeling of the coating film surface are observed even after 20 days of operation. Was never generated. Further, the time required for the series of steps from step S1 to step S5 is about 2 hours, which is about 1/4 of the polishing time when the urethane-based paint which is not UV-curable is used.

By the way, the polishing paper used in the above-mentioned step S1 can shorten the polishing time by using a relatively rough paper, but in a general polishing method, since it approaches the surface state before polishing, the final polishing thereafter. JIS R625 at the stage
The surface roughness is removed by polishing with a relatively fine abrasive paper of about # 800 according to No. 3. It is possible to apply paint without removing this surface roughness, but in that case,
In order to obtain a sufficient gloss, the paint needs to be applied repeatedly 2-3 times or more. This is because the film thickness required to cover the surface roughness cannot be obtained by one application. However, in this embodiment, as described above, the UV-curable coating material is used, and the fact that this UV-curable coating material has a very high viscosity makes it possible to use a relatively rough JIS R6253.
# 240 to # 600 by # 240 to # 40
The final polishing step is polishing with 0 polishing paper. With such a polished surface, it is possible to obtain a film thickness having a sufficient glossiness by a single application. Furthermore, application to rubber with severe bending, which is peculiar to a handrail, has a problem of adhesion of the coating film to the surface of the handrail. Sufficient adhesion is obtained for coating on the ridge surface.

[0014]

As described above, in the method for polishing a handrail for a man conveyor according to the present invention, at least a UV-curable coating material is applied after a roughness polishing step for maintaining adhesion is performed. By the viscosity of the UV-curable coating, a handrail having a required thickness and excellent adhesion and gloss can be obtained without repeated coating. Further, since the ultraviolet curable coating material is used, the coating material is cured by irradiation of ultraviolet light, and the work can be completed in a short time without being restricted by the outside air temperature.

[Brief description of drawings]

FIG. 1 is a work flow chart showing a polishing method for a handrail for a conveyor according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a general passenger conveyor handrail.

FIG. 3 is a perspective view showing a handrail polishing process using a belt sander.

[Explanation of symbols]

 1 handrail

Front Page Continuation (72) Inventor Akihiro Takeuchi 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hirtata engineering Co., Ltd. No. Nitagita Engineering Co., Ltd.

Claims (3)

[Claims] 1. A method for glazing a handrail for a man conveyor, which comprises applying a paint to the surface of the handrail to polish the surface after the polishing step for removing dirt on the surface of the handrail to be glazing. Along with removing the dirt on the surface, a polishing step for maintaining adhesion with the coating material, and after removing polishing powder on the surface of the handrail after the polishing step, an ultraviolet curable coating material is used as the coating material. A method for polishing a handrail for a man conveyor, which comprises a step of applying to the rail surface and a step of irradiating with ultraviolet rays to cure the ultraviolet curable coating material. 2. The method according to claim 1, wherein the polishing step is # 240 to # 600 according to JIS R6253.
The method of polishing a handrail for a man conveyor is characterized in that the final polishing is performed by using the water-resistant abrasive paper of. 3. The method according to claim 1, wherein the polishing step is # 240 to # 400 according to JIS R6253.
The method of polishing a handrail for a man conveyor is characterized in that the final polishing is performed by using the water-resistant abrasive paper of.