JPH0441970Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a coating brush used in a coating device that mainly uses a robot to apply coating agents such as primers, paints, and adhesives.

(Conventional technology) Coating brushes conventionally used in coating equipment
As shown in FIG. 2, A' has a male threaded shaft part 1 for brush attachment, which is screwed into the female threaded hole part 6 of the brush attachment part 5 of the applicator, at the base end, and this male threaded shaft part 1 at the distal end side. A metal body 3 having a cylindrical part 2 for attaching bristles coaxially with the male threaded shaft part 1; A large number of relatively soft hair materials (e.g. horse hair, pig hair, soft resin fiber) 4 whose root portions 4a are inserted into the cylindrical portion 2 in a protruding state (e.g. 20 mm to 35 mm), The bristle material attaching cylindrical part 2 is provided so that its tip position is approximately at the same level as the tip position of the body 3. The bristle attachment cylindrical portion 2 has a cylindrical shape that protrudes concentrically from the distal end face of the large diameter flange portion 7 at the center of the body 3 and has a large diameter male threaded shaft portion 8a at its base end. a main shaft body 8; and a cylindrical outer cylinder 9 fitted onto the main shaft body 8 and screwed onto the large diameter male threaded shaft portion 8a; The root part of the bristle material 4 is inserted and fixed in the space. A coating agent discharge channel 10 is provided through the body 3 in the axial direction of the center thereof.

(Problems to be Solved by the Invention) In the configuration of this conventional brush, as is clear from FIG. The protruding part is very easily deformed, and therefore the application width changes due to variations in the pressure (pressing pressure) when the brush is brought into contact with the surface to be coated, and also due to changes in the brush pressing pressure, especially If the pressing pressure suddenly increases, there is a problem that the lubricant contained in the bristles of the brush may suddenly be released and cause so-called dripping, and furthermore, the protruding length of the bristles 4 is long. Therefore, the surface area that comes into contact with the air increases, and therefore the hair material 4
In the intermediate portion in the length direction, that is, in the portion of the bristle material 4 impregnated with the coating agent discharged from the distal end outlet of the coating agent discharge channel 10, the coating agent dries and hardens on the surface side, and the brush remains after the coating operation. There was an inconvenience that cleaning was very time consuming.

In addition, if you use a short bristle material in advance to shorten the protruding length from the tip of the bristle material attachment cylindrical part 2,
Although the above problem is solved to some extent, the overall length of the brush is shortened, so when applying to a stepped area such as a car window, the brush is attached to a bracket on the main body of the applicator, etc. On the other hand, it becomes impossible to form a bristle portion impregnated with the coating agent discharged from the distal end outlet of the coating agent discharging channel 10, and the tip of the bristle material 4 comes into contact with unnecessary parts, making the coating work difficult or impossible. Since there is a hole in the center, there is an inconvenience that the coating material drips from the tip of the bristle material 4 or the liquid drips as described above.

In addition, if bristles made of hard resin such as nylon are used as bristles, problems such as deformation of the bristles and variation in application width due to variations in brush pressing pressure can be solved, but bristles As a result, the bristle material comes into point contact with the surface to be coated during application, and as a result, the surface of the applied film becomes uneven, making uniform application impossible. A new problem has arisen: the bristles splash and the coating agent scatters, contaminating the surrounding area.

(Technical means for solving the problems) The present invention provides a coating brush that can solve all the problems mentioned above. A threaded part 1 for attaching a brush is provided to be screwed onto the brush mounting part 5 of the brush, and a cylindrical part 2 for attaching bristle material is provided coaxially with the threaded part 1 on the tip side. A body 3 having a coating agent discharge channel 10 extending therethrough in the axial direction, and a base portion 4a which is bundled into a cylindrical shape and protrudes a predetermined length from the tip of the bristle material attachment cylindrical portion 2. A large number of bristles 4 are inserted into the cylindrical part, and the tip of the bristles protruding from the bristle attachment cylindrical part 2 is left for a required length, and the bristles are removed from the bristles. A cover body that covers the mounting cylindrical part 2, and includes the coating agent discharge channel 1.
The bristle material 4 is provided so as to protrude further forward than the distal end outlet of the bristle material 4 to restrain the spread of the bristles 4 and to direct the coating agent discharged from the distal end outlet of the coating agent discharging channel 10 to the bristle material 4. a cylindrical cover body 11 for forming a space for impregnating a coating agent;
It is characterized by consisting of.

(Example) An example of the present invention will be described below based on FIGS. 1 and 3. In this example, the second
Components that are the same as those of the conventional example shown in the drawings are given the same reference numerals, and their explanations are also simplified.

The applicator brush A shown in FIG. 1 includes a metal body 3 and a large number of relatively soft bristles 4 protruding from the tip of the bristle material attaching cylindrical portion 2 of the body 3 by, for example, about 20 mm to 35 mm. Then, with the tip portion 4b of the bristle material 4 protruding from the tip of the cylindrical portion 2 remaining, for example, about 5 mm to 15 mm, the bristle material 4 on the near side is removed.
A cover body 11 is fitted to cover the cylindrical part 2 from the cylindrical part 2, and restrains the spread of the bristles 4, as well as from the distal end discharge port of the coating agent discharge channel 10. The ejected coating agent is transferred to the hair material 4.
and a cylindrical cover body 11 for forming a space for impregnating a coating agent to uniformly distribute the coating material at the tip portion 4b of the bristle material.

The cylindrical cover body 11 is made of a cylindrical body made of synthetic resin or metal, and has a proximal end side for attachment that is tightly fitted into the outer cylinder 9 of the cylindrical part 2 for attaching hair material. The cylindrical body part 11a has an inner diameter that is almost the same as the inner diameter of the outer cylinder 9, and is coaxial with the cylindrical body part 11a so as to protrude sufficiently long beyond the distal end outlet of the coating agent discharge channel 10. It consists of a distal end cylindrical body part 11b that is integrally arranged, and in this distal end cylindrical body part 11b, there is a tube for impregnating the bristle material 4 with the coating agent discharged from the distal end discharge port of the coating agent discharge channel 10. The space for impregnating the coating agent is formed, and the portion of the bristle material 4 protruding from the tip of the bristle material attachment cylindrical portion 2 is tightly restrained by the tip side cylindrical portion 11b, and the tip thereof Only the portion 4b is allowed to be freely deformed to some extent.

FIG. 3 shows a state in which the coating brush A is attached to a coating device using a multi-jointed robot 12, and this robot 12 has a rotating wrist 12b and a bending wrist 12c at the tip of an arm 12a. A bracket 13 is attached to the lower end of the bent wrist 12c, and a brush attachment part 5 is provided at the lower end of the bracket 13. 1 is screwed onto the brush A.

Further, the coating agent flows from a coating agent pumping device (not shown) through the tube 14 and into the coating agent discharge channel 10 in the body 3 through the female screw hole 6. FIG. 3 illustrates a state in which, for example, a primer is applied to a flange portion P of a body B to which a rear window glass G of an automobile is attached. This brush A
According to the use, since the proximal end side of the bristles 4 is restrained by the cylindrical cover body 11, the distal end portion 4
The deformation of b is limited, so even if there is some variation in the pressing pressure of the brush A by the robot 12, the coating width will hardly change. Also, as is clear from this figure, since the entire brush A is long, the bracket 13 is attached to the non-applied area, that is, the flange part P of the body B.
There is no contact with the rising wall portion W or corner portion R of.

In the above embodiment, an example was shown in which a so-called rigid cylindrical body made of metal or synthetic resin was used as the cylindrical cover body, but the cylindrical cover body of the present invention is not limited to this. Alternatively, a tape-like sheet made of synthetic resin may be wound from the bristles portion to the cylindrical portion for attaching the bristles.

Furthermore, although the mounting threaded portion on the base end side of the body is a male threaded shaft in this embodiment, it may be a female threaded hole and the male threaded shaft may be provided in the brush mounting portion of the applicator.

(Effect of the invention) The applicator brush of the present invention is such that the proximal end side of the bristle material protruding from the tip of the bristle material attachment cylindrical part is covered and restrained by a cylindrical cover body. This restricts the free deformation of the bristle material, which prevents changes in the coating width due to variations in the brush pressing pressure during application, and also prevents the bristle from being included in the bristle material due to sudden changes in the brush pressing pressure. It is possible to prevent inconveniences such as when the coating agent is suddenly released and causes a dripping phenomenon.

In addition, the cylindrical cover restricts the spreading of the bristles that protrude long from the bristle attachment tubular part as described above, and at the same time prevents the lubricant discharged from the distal end of the dispensing agent discharge channel from spreading into the bristles. Since it forms a space for impregnating the coating agent to uniformly distribute the coating material at the tip of the bristle material, it prevents the coating agent from dripping from the tip of the bristle material or liquid. Uniform application can be performed without causing dripping, and there is no risk that the surface side of the bristle material impregnated with the coating agent will dry or harden.

Furthermore, according to the present invention, since the total length of the brush can be made sufficiently long, the brush mounting bracket on the device main body side can be used to coat surfaces with uneven surfaces such as the windows of automobiles. There is no contact with the application part, so the application work can be performed without any hindrance. Furthermore, according to the present invention, since soft bristles can be used, smooth and uniform application to non-coated surfaces is possible, and there is no problem of the bristles bouncing on the surface to be coated and causing the coating agent to scatter. It disappears.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a coating brush showing an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of a conventional coating brush, and Fig. 3 is a vertical cross-sectional view of a coating brush shown in Fig. 1. FIG. A... Brush for application, 1... Male threaded shaft part for brush attachment (screw part for brush attachment), 2... Cylindrical part for attaching bristle material, 3... Body, 4... Bristle material, 4a... Bristle Root portion of the material, 4b...tip portion of the bristle material, 5...brush mounting portion, 6...female threaded hole portion, 10...coating agent discharge channel, 11...cylindrical cover body.

Claims (1)

[Scope of utility model registration request] A threaded part 1 for attaching a brush is provided on the proximal end side to be screwed onto the brush mounting part 5 of the applicator, and a cylindrical part 2 for attaching bristle material is provided coaxially with the threaded part 1 on the distal end side. a body 3 having a coating agent discharge channel 10 extending through the center thereof in the axial direction; In this state, a large number of bristles 4 whose base portions 4a are inserted into the cylindrical portion, and the tip portions of the bristle materials 4 protruding from the bristle material attachment cylindrical portion 2 are left for a required length. It is a cover body that covers the bristle material 4 of the lever and the bristle material attachment cylindrical part 2, and is provided so as to protrude further forward than the distal end discharge port of the coating agent discharge channel 10. I was hit,
A cylindrical cover body 11 for restricting the spread of the bristle material 4 and forming a coating agent impregnating space for impregnating the bristle material 4 with the coating agent discharged from the distal end outlet of the coating agent discharge channel 10. A coating brush in a coating device comprising: