JPH072724Y2 - Excavator for snow removal equipped on a special vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement of a shovel equipped in a special vehicle such as a shovel loader or a bulldozer mainly used for snow removal.

[Conventional technology]

As is well known, in the snowfall region, special vehicles such as shovel loaders and bulldozers are operated during the winter to remove snow accumulated on the road so that safe and smooth traffic on the road is not hindered. .

By the way, shovel loaders, bulldozers, etc. are equipped with shovels (such as buckets and earthwork boards) that handle snow, and this shovel is usually painted.

[Problems to be solved by the device]

However, the paint painted on the shovel came off during repeated use under severe weather conditions in the winter, and snow adhered to the place where the paint was removed, and the work of scooping snow with the shovel and discarding it Not only does the work of shifting the snow on the shoulders not proceed smoothly, but it also shortens the life of the shovel. In addition, repainting paint within a year has also been extremely troublesome and costly.

Therefore, the present invention has been made based on the above-mentioned circumstances, and is equipped in a special vehicle that can remove snow for a long period of time without adhering snow, improve its work efficiency, and extend the life of the shovel. The purpose is to provide a shovel for removing snow.

[Means for Solving the Problems]

In order to achieve the above object, a shovel for snow removal equipped in a special vehicle according to the present invention has a coating film made of polyurethane resin coated without a solvent and having a film thickness of 2 mm to 5 mm on at least the entire inner surface of the shovel. It is constructed by fixing the membrane layers.

〔Example〕

Hereinafter, embodiments of a shovel for removing snow from a special vehicle according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 indicates, for example, a shovel loader 2
With a bucket that is one form of shovel that is equipped with
The structure of this bucket 1 is basically the same as that of the conventional bucket, but in the case of the present invention, the entire inner surface of the bucket 1 is coated with a solvent instead of the conventional paint film layer of paint. The coating layer 3 made of polyurethane resin
The greatest feature is that the film is provided with a thickness of 2 mm to 5 mm.

Further, FIG. 2 is a similar example of the above-mentioned embodiment and is a coating film layer of a conventional paint over the entire concave curved surface of an earthworking plate (also referred to as an earth discharging plate) 4 which is one form of a shovel provided in the shovel loader 2. Instead of the coating layer 3 similar to the case of the bucket 1.
Are provided with the same film thickness.

As the polyurethane resin applied without mixing the above-mentioned solvent, a two-component solventless polyurethane resin paint in which the volume ratio of the paint liquid and the curing agent is 3: 1 is used, and the composition component of the paint liquid is polyol. It consists of resin (55%), color pigment (33%), extender pigment (3%) and additive (9%), and the composition of the curing agent is modified isocyanate resin (100%). Trade name is known as Miseron S-100 / A
-1000 (manufactured by Mitsui Metal Paint Chemical Co., Ltd.) was used.

Next, when the coating layer 3 is applied to the bucket 1 and the earthwork plate 4 provided in the shovel loader, the following construction process is performed.

Substrate treatment First, sand is jetted onto the metal surface on the inner surface of the bucket or the concave curved surface of the earthwork plate to make the metal surface rough.
Performs so-called blast processing. This is to improve the adhesion between the metal surface and the coating layer.

Cleaning After blasting, remove dust, metal powder and sand on the metal surface and thoroughly clean it.

Undercoat Mizeron R primer (trade name; manufactured by Mitsui Kinzoku Kagaku Co., Ltd.) is applied to the cleaned metal surface by airless painting or brush painting at a rate of 0.10 kg / m ² . This is for strongly and tightly adhering the metal and the top coating material (coating layer).

The MIZERON R primer is a two-component polyurethane resin paint, and the composition component of the paint liquid is an epoxy-modified polyol resin, a pigment, an additive, and an aromatic ketone-based solvent, and the curing agent is a modified isocyanate resin. , These are appropriately mixed and mixed.

Topcoat After undercoating, spray the product name "Mizeron S-100 / A-1000" manufactured by Mitsui Kinzoku Kagaku Kagaku Co., Ltd. with a dedicated coating machine to a uniform thickness between 2 and 5 mm. Form a membrane layer. The film thickness control at this time is performed by controlling the amount of paint used and the wet film thickness meter while coating.

Repair After the overcoating, defects in the coating layer found by visual inspection are repaired with a brush or spatula using Mizeron B-500 / A-5000 (trade name; manufactured by Mitsui Metal Coating Chemicals Co., Ltd.).

Next, about the special coating machine that sprays the top coating
Description will be given with reference to the drawings.

FIG. 3 shows a paint supply system. Reference numeral 11 is a drum for containing the coating liquid P. A hand heater 12 is attached to the drum 11, and reference numeral 13 is for the curing liquid Q. It's a drum. Reference numeral 14 is a pressure feed pump for feeding the coating liquid P contained in the drum 11 to the metering pumps 15 and 15, and 16 is the curing liquid Q contained in the drum 13 to the metering pump 17. It is also a pressure pump for feeding, and filters 18, 18 and heaters 19, 19 are interposed between the pressure pumps 14 and 16 and the metering pumps 15, 15 and 17, respectively. The heaters 19 and 19 are for raising the temperature to 45 ° C. to 50 ° C. which is the optimum temperature of the paint.
This heating has the effects of lowering the viscosity of the coating material and making it easier to atomize, and at the same time, promoting reaction curing and preventing sagging of the coating film.

Paint liquid P that is quantitatively discharged from the metering pumps 15,15,
The hardening liquid Q quantitatively discharged from the metering pump 17 is sent to the mixer manifold 21 while being heated by separate pressure-resistant heating hoses 20, and further sent to the static mixer 23 via one coating hose 22. Here, after the coating liquid P and the curing liquid Q are uniformly mixed, the mixed liquid is atomized by the spray gun 24 and sprayed.

Reference numeral 25, 25 denotes a circulation circuit, which heats the material to 30 ° C to 40 ° C through the circulation circuit when the original paint temperature is low and the paint cannot be heated to the optimum temperature. Further, 26 is a cleaning system comprising a tank 27 for containing the solvent R and a cleaning pump 28, and a mixer manifold
It is for washing away the mixed paint from 21 onwards.

Air is supplied from the compressor 29 to the pressure pumps 14 and 16 and the cleaning pump 28.

By spraying the two-component solventless polyurethane resin paint (trade name: MIZERON) on the metal surface of each inner surface of the bucket or earthwork plate using the exclusive coating machine described above, the desired film thickness can be obtained with one spray. Since it can be applied to, and it does not contain a solvent, it dries and cures quickly without sagging or pinholes, and the adhesion of the coating is tight and highly flexible. Since the surface is smooth and the frictional resistance is small, it is possible to form the coating film layer 3 which is excellent in wear resistance and impact resistance, and also excellent in non-adhesion of snow. In particular, the coating layer 3 is highly flexible and exhibits excellent wear resistance and impact resistance even at a low temperature, and is therefore most suitable as a coating for snow removal.

In the above-mentioned embodiment and its examples, a typical special vehicle called a shovel loader equipped with a shovel has been described.
The present invention can also be applied to shovels of other special vehicles used for snow removal, for example, snowboards of Russell vehicles. Further, although the coating layer is formed only on the inner surface side of the shovel in the examples, the coating layer may be provided on the entire inner and outer peripheral surfaces of the shovel.

[Effect of device]

As described above, according to the present invention, an ultra-thick coating layer having a thickness of 2 mm to 5 mm made of polyurethane resin coated without mixing a solvent is fixed to at least the entire metal inner surface of a shovel of a special vehicle. The shovel surface is protected by a tough coating film with high smoothness, and therefore, snow can be prevented from adhering during the snow removal work, and the work efficiency can be dramatically improved, and the winter Flexible even at low temperatures, resistant to abrasion and impact,
Combined with the close adherence to the shovel surface, the shovel coating interval can be significantly extended over a period of time, and the life of the shovel itself can be extended by a tough protective coating with a thick film thickness. It has an effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention with a part cut away.
FIG. 2 is a perspective view showing a partial cutaway example of an embodiment of the present invention, and FIG. 3 is an explanatory view showing a paint supply system in a dedicated coating machine used for forming a coating layer. 1 ... Bucket (shovel), 3 ... Coating layer, 4 ... Earthwork plate (shovel)

Claims (1)

[Scope of utility model registration request] 1. A shovel having a film thickness of 2 m made of polyurethane resin coated without mixing a solvent on at least the entire inner surface.
A shovel for removing snow, which is equipped on a special vehicle, characterized in that a coating layer of m to 5 mm is fixed.