JPH0379689A - Method for coating hand-rail belt - Google Patents

Abstract

PURPOSE:To coat a hand-rail belt with a coating film having sufficient gloss and resistant to abrasion, peeling and cracking in a short time in high efficiency by applying a detergent to a hand-rail belt, polishing with abrasives having three grain sizes and coating the polished surface with a specific coating agent. CONSTITUTION:The surface of a hand-rail belt is coated with preferably an oily detergent and left standing for a prescribed period to effect the flotation of the stain. The treated surface is polished in wet state with an abrasive having a grain size of about #400. The polished surface is further polished with an abrasive having a grain size of #150-400 and then with an abrasive of #500-600. The surface is finally coated with a coating agent composed mainly of an acrylic copolymer resin.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a method of coating a handrail belt.

<Prior Art> Movable handrail belts are used on escalators, autoruns, etc.

This handrail belt is covered with dirt and grime from many people's hands.

Alternatively, the surface becomes black and dirty due to wear and oil stains caused by contact with the drive device.

A handrail belt coating method has been known in which such dirt is removed by polishing, and then the belt surface is coated with a synthetic resin film.

<Problems to be solved by the invention> However, in the conventional method, polishing was performed using a normal abrasive material, which had the disadvantage that the abrasive grains of the abrasive material were clogged with oil stains, etc., and it took a long time to complete the grinding process. was there. In addition, since the polished dust floats in the air and descends after several hours, the dust falls in the vicinity, soiling windows, showcases, products, etc., and making cleaning very troublesome.

Furthermore, including drying time for synthetic resin coating, 12
There was a drawback that it required ~15 hours.

<Summary of the Invention> The present invention has been made to solve the drawbacks of the conventional methods described above, and aims to provide a coating method that can obtain a strong coating surface in a short time without generating dust. This is the purpose.

In the present invention, detergent is first applied to the surface of the handrail belt and left for a predetermined period of time. The detergent to be applied is preferably an oil-based detergent, and after application, it is preferably left in the apparatus for 2 to 3 minutes to wait for the detergent components to penetrate into the dirt. After a predetermined period of time has elapsed, the surface of the handrail belt is polished with an abrasive having a particle size of approximately #400. This polishing is wet polishing in which the surface of the belt is polished using a detergent. As the abrasive material, it is desirable to use a nylon bat or the like in which abrasive particles are adhered to a nonwoven fabric. In this case, the abrasive particles are particles whose polished surface roughness corresponds to particle size #400.

Here, we limited the abrasive material to a particle size of approximately #400 because if it is less than this, it will take too long to remove the dirt, and if the particles are coarser than this, the dirt will be removed by simply scratching and sliding on the surface of the stuck dirt. This is because it has no effect.

As mentioned above, use detergent to lift the dirt,
By polishing with an appropriate abrasive particle, dirt can be removed efficiently in a short time. Furthermore, since this polishing is a wet process, no dust is generated.

After removing the dirt as described above, the particle size is #150 to #
The surface of the handrail belt is polished with a 400% abrasive.

This removes scratches and deteriorated parts of the belt surface,
At the same time, peaks and valleys of 2 to 3 μm are formed on the belt surface. Here, we limited the grain size to #150 to #400 because dirt on the surface has been removed in the previous process, so there is no need for much polishing, and if we polish with a grain size larger than this, the peaks on the polished surface will become high. This is because it is too much. This is because if the peaks become too high, the synthetic resin coating must be applied several times in the next step to make it thicker, and if one layer is applied to increase the film thickness, the bonding force will weaken and cause peeling. In addition, particle size #1
If the polishing is less than 50 to 3400, sufficient peaks and valleys cannot be formed.

Next, the surface of the handrail belt is further polished with an abrasive with a grain size of #500 to #8600, and at the same time, the scratches caused by the abrasive with a grain size of #150 to #400 are removed, and at the same time, the slopes of the peaks and valleys of 2 to 3 μm are further polished with 0.3 to 0.0 μm. Forms fine peaks and valleys of .5μ. Due to the composite peaks and valleys of 2 to 3μ and 0.3 to 0.5μ,
It can firmly bond the synthetic resin film applied in the next process.

Moreover, at the same time, it is possible to diffusely reflect light and give sufficient gloss to the belt surface.

After polishing the belt surface through the above steps, a coating agent containing acrylic copolymer resin as a main component is applied in this state. Apply this coating agent about 3 times and
．． It is preferable to form a film of 0.015 mm to 0.02 mrn. The coating agent mainly composed of acrylic copolymer resin is easy to apply because it is a water-soluble coating agent, and the drying time is short at 10 to 20 minutes. Even after coating three times, it only takes about two hours to install the escalator using a cogti jig.

<Example> Next, examples will be shown.

FIG. 1 is a sectional view of a handrail belt for an escalator, and this handrail belt is composed of a thick woven canvas core 1 and a decorative rubber layer 2. (A) shows a state in which dirt and aged parts 3 are formed on the surface of the decorative rubber layer 2.

With the escalator in a stopped state, first, on the left and right belts exposed at the top, a solution prepared by diluting an oil-based detergent with the following ingredients 5 to 20 times is applied to the belt surface.

Leave it for 2 to 3 minutes and wait until the detergent penetrates into the dirt. Scotch Brite S is a non-woven fabric with abrasive particles attached.
/F hand vat (corresponding to particle size #400) is impregnated with the detergent and the soiled surface is removed. After removing the dirt on one side of the exposed belt, turn the belt over and remove the dirt on the remaining side in the same process (a). At that time, mask the area around the escalator, especially the inner panel, in advance so as not to stain it with detergent.

(Detergent ingredients) Nonionic surfactant Glycol solvent Anionic surfactant Corrosion inhibitor Silicate builder
After removing dirt on the belt surface with water chelating agent, "scratches" on the belt surface
The aged part is ground using an orbital sander or a belt sander with sandpaper having a grain size of #150 to #400 attached to remove "scratches" and aged parts, and form peaks and valleys of 2 to 3 microns. Furthermore, a sand vapor with a grain size of #500 to #600 is installed and polished to erase the scratches caused by polishing with a grain size of #240 to #320, and a composite peak and valley 4 of 0.3 μ to 0.5 μ is added to the slope of a mountain and valley of 2 μ to 3 μ. form (tsu)
.

After cleaning the grinding debris adhering to the belt surface, a cloth tamper is soaked with the following coating agent, which is mainly composed of acrylic urethane copolymer resin, and applied thinly.

After applying once, dry for 10 to 15 minutes and apply three times. 3
The drying time after the second application is 30 to 40 minutes, allowing the coated surface to completely harden. 3. After the surface is completely hardened, turn the belt over and coat the remaining side in the same process.
(1).

(Coating agent components) Acrylic-urethane copolymer resin High melting point wax Emulsion leveling agent Surfactant Plasticizer Preservative Water (Kochii non-volatile content: PH (25℃): Viscosity (25℃): Specific gravity (25℃): Ng Drug physical property value) 21.0±2.0% 8.8±0.5 11.0±5. Oc, p, s 1.033 and 0.004 In the above process, the polishing work can remove dirt very easily with detergent, so the labor required is only 173 lbs., and the working time is 1 hour, which is less than the conventional 173 lbs. was able to be reduced to Also, since it was a wet polishing process, there was almost no dust during the polishing process. Furthermore, since the coating process uses a material mainly composed of acrylic urethane copolymer, it is as easy as waxing a car, takes only 10 to 20 minutes to dry, and can be coated three times per escalator machine. It only took about 2 hours.

The obtained number 1!15 is 0. As shown in FIG. 2, a bar with a radius at the tip is pressed against the surface of this coating 5 with a load of 6 kg, and the thickness is 15 to 0.02 mm.
50,000 rubs were applied at 0 cycles/min. As a result, no wear occurred.

Furthermore, as shown in Figure 3, the amount of $1 [5 is on the bottom and
90' bends were made 3.000 cycles/min. As a result, no peeling or cracking occurred.

<Effects of the Invention> As explained above, in the method of coating a handrail belt of the present invention, after applying detergent to the surface of the handrail belt and leaving it for a predetermined period of time, the surface of the handrail belt is coated with an abrasive material having a particle size of approximately #400. Wet polishing, then grain size #240~#3
In order to polish the surface of the handrail belt with an abrasive of #20 and further polish the surface of the handrail belt with an abrasive of #500 to #600 in particle size, and in this state apply a coating agent mainly composed of acrylic copolymer resin. 5. It has good workability and requires only a short working time, has a high degree of bonding and does not easily wear off, peel or crack, and can provide a coating with sufficient gloss.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of one embodiment of the method of the present invention, Figures 2 and 3
The figure is an explanatory diagram of the test method. 1: Thick-edged canvas core, 2: Decorative rubber layer, 3: Dirt and aging area, 4: Composite peaks and valleys, 5: Covering.

Claims (1)

[Claims] After applying a detergent to the surface of the handrail belt and leaving it for a predetermined period of time, the surface of the handrail belt is wet-polished with an abrasive material with a particle size of approximately #400, and then with an abrasive material with a particle size of #150 to #400. It is characterized by polishing the surface of the handrail belt, further polishing the surface of the handrail belt with an abrasive with a particle size of #500 to #600, and applying a coating agent mainly composed of acrylic copolymer resin in this state. How to coat handrail belts.