JPH01281171A - Roller brush - Google Patents

Abstract

PURPOSE:To make it possible to coat easily a folded part only by covering the surface of a brush part of a roller with a net to prevent the oozing out of coating material. CONSTITUTION:A roller 2 having brush part 21 on the outer periphery thereof is caused to be held rotatably by a roller handle 1, while the surface of the brush part 21 of the roller 2 is covered with a net 3 held over the roller 2. While keeping the net 3 in contact with the surface of an article to be coated, the roller 2 is rotated so that coating material held in the brush part 21 is applied to the surface through the net 3. As a result, the oozing out of coating material is prevented, while only the folded part can be easily coated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roller brush for applying paint or the like. The roller brush of the present invention is used, for example, when painting bent portions in the wheel arches of automobiles.

[Prior Art] Painting using a roller brush has conventionally been carried out mainly for architectural painting. This conventional roller brush is comprised of a roller handle and a roller rotatably held by the roller handle and having a brush portion on its outer peripheral surface. Then, by impregnating the brush portion with paint and rotating the roller against the object to be coated, the paint contained in the brush portion is transferred to the object to be coated.

Incidentally, a bent portion 100 as shown in FIG. 4 is formed in a wheel arch or the like constituting a tire house of an automobile. In order to protect the bent portion 100 from collisions with pebbles and the like, a paint having excellent chipping resistance is usually coated generously. This chipping-resistant paint only needs to be applied to the surface of the bent portion 100, and
It is not desirable to be painted 00.

Various painting methods are known for painting only the bent portion 100 in this way. For example, there is a method of painting using airless or air spray.

However, it is difficult to paint in a narrow working space such as inside a wheel arch, and there are problems in that the coating efficiency is poor and the environment becomes dirty due to overspray. Also, a method of painting only the bent portion 100 with a brush, roller brush, etc. is also often used. This method reduces paint loss and environmental pollution.

However, with brushes and conventional roller brushes, the tips of the bristles touch areas other than the areas being applied, as shown in Figure 5.
There is a problem that up to 200 of the body outer panels are painted (
(Hereinafter, this will be referred to as protrusion painting). Furthermore, if you try to carefully apply the coating so that no protruding coating occurs, the time required for the coating will be long, resulting in poor productivity.

[X that the invention attempts to solve! The present invention has been made in view of the above-mentioned circumstances, and its technical problem is to prevent the protruding coating by improving the structure of the roller brush so that only the bent portion can be easily coated. It is something.

[Means for Solving the Problems] The roller brush of the present invention includes a roller handle, a roller rotatably held by the roller handle and having a brush portion on its outer peripheral surface, and a roller that covers the surface of the brush portion of the roller and is held by the roller. The roller is rotated while the net is brought into contact with the surface of the object to be coated, and the coating liquid held in the brush part is applied to the surface of the object to be coated through the net. It is characterized by

The roller handle has a roller rotatably held at one end,
The other end is usually provided with a handle to make it easier to hold.

The structure can be similar to the conventional structure, such as a structure in which the roller is held from both ends or a structure in which it is held from one side.

The roller generally has a circular cross section and has a brush portion on its outer peripheral surface that can contain paint. The brush portion may have a conventional structure, such as one made of natural hair, synthetic fiber, mohair, or the like, or a porous foam made of polyurethane, vinyl acetate, or the like. The shape of this roller is generally cylindrical, but it can also be shaped like a truncated cone or an abacus bead.

The coupling structure between the roller and the roller handle may be a conventional structure as long as the roller is rotatably held. For example, there is a structure in which a screw is provided at the tip of the roller handle, and a nut or the like is screwed into the handle after it is inserted into the roller.

Alternatively, a plurality of linear spring members are arranged in a substantially cylindrical shape, and the spring having a biasing force radially outward is rotatably held by the roller handle. Then, there is a structure in which the spring is inserted into the roller while reducing its diameter, and the spring presses the inner circumference of the roller to fix it.

The greatest feature of the present invention is that it has a net on the surface of the cola that covers the surface of the brush. The material of the net is not particularly limited to υ1, such as metal or resin, but it is desirable that the net has enough flexibility to easily return to its original shape due to the elastic force of the brush portion. The mesh of this net can be selected and determined depending on the viscosity of the paint, the amount of coating, the structure of the brush portion, etc. For example, the viscosity of paint is 40 at 20℃.
High viscosity of 00CpSP'1 degree! II! 200 μm
When coating a film as thick as 30 to 50 meshes is appropriate. If the mesh becomes rough, the brush part will protrude from the net and the paint will be raw. Furthermore, if the mesh is fine, it may be difficult for the paint to pass through and the amount of coating may be reduced. Note that as the length of the bristles on the brush portion increases, the amount of starch contained therein increases, and the amount of lubricant that oozes out onto the surface of the net increases, making it easier for paint to ooze out. Furthermore, the shorter the hair, the less amount of paint it contains and the amount of paint applied. 10111 for the above thick film coating
1# invasion is appropriate.

[Operations and Effects of the Invention] In the roller brush of the present invention, the roller surface is covered with a net. Therefore, when the net is pressed against the surface of the object to be coated, such as a bent part, during painting, the brush section is pressed through the net, and the paint contained in the brush section oozes out from the mesh of the net and adheres to the surface of the object to be coated. . On the other hand, in areas where the net is not in contact with the surface of the object to be coated, the brush portion is held down by the net, so that the tips of the bristles are prevented from protruding from the net. This prevents the brush portion from coming into contact with unpainted areas and prevents the paint from spilling out.

Therefore, according to the roller brush of the present invention, it is possible to easily paint the bent portions of the wheel arches and the like without any protruding paint. Since there is no need to carefully and time-consumingly apply the coating, it can be applied in a short time, improving productivity.

[Example] This roller brush includes a roller handle 1 having one end bent into a U-shape and a handle 10 at the other end, and an O-ra 2 rotatably held at one end of the U-shape of the roller handle 1. , and a brass net 3 that covers the surface of the roller 2.

The roller 2 has an outer diameter of 40ffi, as shown in the cross section in Figure 3.
m, FAsu10 C)++e(0 cylindrical shape (D tree m% group v520.!:,, consists of a brush part 21 made of synthetic fibers with a pile of 10 am formed on the entire outer peripheral surface of the base part 20. One end of the roller handle 1 is inserted into the center hole of the base 20, and the roller 2 is rotatably held by a locking protrusion 11 provided on the roller handle 1 and a nut 12.

The net 3 is made of brass wire with a wire diameter of 0.25111,
Its mesh is 40 meshes. This net 3 has an endless cylindrical shape, and its inner diameter is approximately equal to the outer diameter of the brush portion 21.

The folded portion was painted using the roller brush configured as described above. As the object to be coated, an electrodeposition coated plate with a length of 30011 mm was bent at a right angle to a width of 101 m. It was decided to paint the 301m wide section. Moreover, a chipping-resistant paint having a viscosity of 4000 cps at 20° C. was used.

First, as shown in FIG. 2, an appropriate amount of paint 6 is poured into vat 5 containing expander metal 4.

Then, the net 3 and roller 2 are rotated several times while being pressed against the expander metal 4, so that the brush portion 21 is uniformly and sufficiently coated with the paint. The reason why the expander metal 4 is used here is to make it easier to deform the brush part 21 and to make it easier to absorb the paint. By rotating the roller 2, the roller 2 can be compressed to expel air from the brush portion 21, and by releasing the compression, the paint can be impregnated efficiently. - Next, as shown in FIG.
0, and paint is applied to the bent portion 70. At this time, the portion of the roller 2 that is in contact with the bent portion 70 is pressed and recessed, and the paint contained in the brush portion 21 oozes out from the surface of the net 3 and adheres to the surface of the bent portion 70. On the other hand, on the surface of the roller 2 that is not in contact with the bent portion 70, the bristles of the brush portion 21 are held down by the net 3, so that the net 3J is prevented from protruding, and paint is not applied to the surface other than the bent portion 70. Prevents adhesion.

In addition, in the roller brush of this example, the mesh of the net 3 was selected from four levels from 10 to 70 meshes, and a coating experiment was conducted in the same manner. The results are shown in No. 4 of the table. In addition, we have two levels of pile quality: 51 and 15 mm.
A painting experiment was also conducted in the same manner. The result is No. 65 in the table,
Shown in N006.

From the table, it can be seen that when the mesh of net 3 becomes coarse (10 meshes), the paint protrudes. This is because the tips of the hair protrude from the net 3. Furthermore, when the mesh size is as fine as 70 meshes, it becomes difficult to make the film thicker. This is because it becomes difficult for highly viscous paint to pass through the net 3.

Furthermore, if the bristles are short (51 mm), the amount of paint contained in the brush portion 21 will be reduced, making it difficult to apply a thick film, and if the bristles are long (151 m11), the amount of paint contained in the brush portion 21 will increase. Many of the eels are exposed on the surface of the net 3, causing paint to protrude.

By the way, the viscosity of the paint is 3000cps and 5ooo
No. cps, No. 2 and the result of painting under the same conditions.
7 and No. 8. It can be seen that if the net 3 is 30 meshes, the higher the viscosity, the thicker the coating can be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a roller brush according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a state in which paint is applied, and FIG. 3 is a sectional view showing a state in which a bent part is painted. FIG. 4 is a cross-sectional view showing the structure of the bent portion of the heavy body of the #J vehicle, and FIG. 5 is a cross-sectional view showing the bent portion being painted with a conventional roller brush. 1... Roller handle 2... Roller 3... Net 4... Expander metal 5... Bat 20... Base 21... Brush portion 70. 100... Bending portion Patent applicant Aisin Kako Co., Ltd. Agent Patent Attorney Hiroshi OkawaFigure 3Figure 4

Claims (1)

[Claims] (1) Consisting of a roller handle, a roller that is rotatably held by the roller handle and has a brush portion on its outer peripheral surface, and a net that covers the surface of the brush portion of the roller and is held by the roller; The roller is rotated while the net is brought into contact with the surface of the object to be coated, and the coating liquid held in the brush portion is applied to the surface of the object to be coated through the net. roller brush.