JP6879534B2 - Liquid application brush - Google Patents

Description

The present invention relates to a liquid coating brush that is attached to a tip portion of a robot arm or the like and is used when applying a liquid to a product in a production line or the like of various products.

Conventionally, paint tools for paint supply have been known, and as an example thereof, a paint supply unit that continuously and evenly supplies paint through a paint supply tube and a joint, and a paint supply unit for painting. It consists of a brush mounting part that connects the brushes, a pipe mounting plate is internally installed in the brush mounting part via a presser ring, a paint supply pipe is fixed to the pipe mounting plate, and one end surface of the painting brush is further attached to the pipe mounting plate. (Patent Document 1).

Japanese Unexamined Patent Publication No. 09-010663

However, in the coating tool described in Patent Document 1, the paint supply portion and the brush mounting portion are connected by screws to prevent the supplied paint from leaking to the outside, and the brush mounting portion side is filled with the paint. It had a complicated structure to provide space.

On the other hand, in the coating tool described in Patent Document 1, when a space filled with the paint is not provided, it is necessary to accurately align the tube on the paint supply portion side with the paint supply pipe on the brush attachment portion side. There was a paint leak due to misalignment.

The present invention solves the above-mentioned conventional problems, and provides a liquid coating brush capable of preventing liquid leakage due to misalignment between a connecting member and a brush member and reducing manufacturing costs with a simple structure. The purpose is to do.

In order to solve the above-mentioned conventional problems, the invention of the liquid coating brush according to claim 1 is provided with a liquid supply port, a connecting member connected to the liquid supply path of the robot arm, and a tubular body. A cover member having a step portion on the inner wall surface of the body and engaging with the connecting member, a brush body, and a hollow pipe arranged substantially in the center of a cross section orthogonal to the longitudinal direction of the brush body. The fixing portion is provided with one end of the brush body and a fixing portion to which the pipe is fixed, the fixing portion has a liquid receiving port substantially in the center, and a flange portion provided on the outer periphery of the fixing portion has a tubular shape. It has a brush member that is engaged and held in the step portion of the body, and is located at the tip of the liquid supply port or the liquid receiving port in order to prevent a misalignment between the liquid supply port and the liquid receiving port. Along with providing a mating portion, the aligning portion of the liquid supply port or the liquid receiving port is characterized in that it abuts on one of the edges and is deformed so that the inner diameter becomes smaller. Therefore, the liquid supply port and the liquid receiving port are surely communicated with each other by the positioning portion provided in either the liquid supply port or the liquid receiving port, so that the flow path is prevented from shifting and the liquid leakage is prevented. At the same time, the liquid can be smoothly supplied to the brush member. Further, since the structure is simple as compared with the conventional one, the manufacturing cost can be reduced.

The invention of the liquid coating brush according to claim 2 is provided with a liquid supply port, a connecting member connected to the liquid supply path of the robot arm , and a tubular body having a step portion on the inner wall surface of the tubular body. Along with this, a cover member that engages with the connecting member, a brush body, a hollow pipe arranged substantially in the center of a cross section orthogonal to the longitudinal direction of the brush body, one end of the brush body, and the pipe. It is provided with a fixed portion to be fixed, the fixed portion has a liquid receiving port substantially in the center, and a flange portion provided on the outer periphery of the fixed portion is engaged and held by the step portion of the tubular body. In order to prevent the liquid supply port and the liquid receiving port from being misaligned with each other, the liquid supply port and / or the liquid receiving port is provided with an alignment portion, and the pipe is provided with a brush member. It is characterized in that it is integrally fixed with the fixing portion. Therefore, the alignment portions provided on both the liquid supply port and the liquid reception port allow the liquid supply port and the liquid reception port to communicate with each other more reliably, thereby preventing the flow path from shifting and preventing liquid leakage. At the same time, the liquid can be smoothly supplied to the brush member. Further, since the structure is simple as compared with the conventional one, the manufacturing cost can be reduced.

The invention of claim 3 is characterized in that, in the liquid coating brush of claim 1 or 2, the shape of the surface in contact between the alignment portion of the connecting member and the alignment portion of the fixing portion is substantially the same. Therefore, for example, if the taper angle of the surface in contact with the alignment portion of the connecting member and the alignment portion of the fixing portion is substantially the same, the surfaces can be brought into close contact with each other, so that liquid leakage can be further prevented. Can be done.

The invention of claim 4 is characterized in that, in any of the liquid coating brushes of claims 1 to 3 , the inner diameter of the pipe is larger than the inner diameter of the liquid supply port. Therefore, by increasing the inner diameter of the pipe on the downstream side to which the liquid is supplied, it is possible to further prevent liquid leakage.

The inventions of the liquid coating brushes of claims 1 and 2 can prevent the flow path from shifting, prevent liquid leakage, and reduce the manufacturing cost. Further, the invention of the liquid coating brush according to claims 3 and 4 can further prevent liquid leakage.

The schematic diagram which shows the use state of the liquid coating brush which concerns on this invention. Explanatory drawing which shows the attachment part of the liquid coating brush which concerns on this invention. The perspective view of the liquid coating brush which concerns on this invention. A cross-sectional view taken along the line AA of FIG. (A), (b) Explanatory drawing which shows 1st Embodiment of the liquid coating brush which concerns on this invention. (C), (d) Explanatory drawing which shows the 2nd Embodiment of the liquid coating brush which concerns on this invention. (A), (b) Explanatory drawing which shows the 3rd Embodiment of the liquid coating brush which concerns on this invention. (C), (d) Explanatory drawing which shows the 4th Embodiment of the liquid coating brush which concerns on this invention. (A), (b) Explanatory drawing which shows 5th Embodiment of the liquid coating brush which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

FIG. 1 is a schematic view showing a usage state of the liquid coating brush according to the present invention, and FIG. 2 is an explanatory view showing an attachment portion of the liquid coating brush according to the present invention. The liquid coating brush 10 according to the present invention is mainly used in an automobile production line, and a primer (on the surface of an adherend) is applied before applying an adhesive to a door frame or applying an adhesive. It is used to apply a low-viscosity liquid with a small amount of non-volatile components to be applied to improve adhesiveness. The liquid coating brush 10 according to the present invention can be used not only as an adhesive or the like but also as a brush for supplying various liquids such as paint.

As shown in FIG. 1, the liquid application brush 10 is attached to the tip end portion of the robot arm 11 and applies the liquid to a designated portion of the work 13 placed on the work table 12. Then, as shown in FIG. 2, the tip of the liquid supply path 14 provided on the robot arm 11 side and the screw portion 1a formed in the connecting member 1 of the liquid coating brush 10 are screwed together. The liquid supply path 14 communicates with a liquid supply port provided in the connecting member 1 to be described later, and the liquid to be applied is supplied from the robot arm 11 side to the liquid application brush 10 side.

FIG. 3 is a perspective view of the liquid coating brush according to the present invention, and FIG. 4 is a sectional view taken along the line AA of FIG. Further, FIGS. 5A and 5B are explanatory views showing a first embodiment of the liquid coating brush according to the present invention. The first embodiment of the liquid coating brush according to the present invention will be described with reference to these figures.

The liquid coating brush 10 of the first embodiment includes a liquid supply port 1b, a connecting member 1 connected to a liquid supply path such as a robot arm, and a tubular body 2a, and is an inner wall surface of the tubular body 2a. The 2b is provided with a step portion 2c, and also has a cover member 2 that engages with the connecting member 1 and a brush member 3.

The brush member 3 is fixed to the brush body 3a, a hollow pipe 3b arranged at substantially the center of a cross section orthogonal to the longitudinal direction of the brush body 3a, and one end 3c and the pipe 3b of the brush body 3a. The fixed portion 3d has a liquid receiving port 3e substantially in the center, and the flange portion 3f provided on the outer periphery of the fixed portion 3d is engaged and held by the step portion 2c of the tubular body 2a. ing.

Then, in order to prevent the liquid supply port 1b and the liquid receiving port 3e from being misaligned, the liquid supply port 1b is provided with an alignment portion 1c. As shown in FIG. 5A, the alignment portion 1c is formed in a protruding shape at the edge of the liquid supply port 1b, and an inclined surface is formed on the outer peripheral side. Then, as shown in FIG. 5B, the inclined surface of the alignment portion 1c comes into contact with the edge portion of the liquid receiving port 3e and is pushed downward, so that the connecting member 1 is deformed and the alignment portion 1c is deformed. The connecting member 1 and the brush body 3a communicate with each other in a state of being located inside the edge of the liquid receiving port 3e. The inner diameter of the flow path 1d of the connecting member 1 shown in FIG. 4 is changed according to the viscosity of the liquid such as resin or paint flowing through the flow path 1d.

Here, by using a synthetic resin such as polypropylene as the material of the connecting member 1, the deformation around the alignment portion 1c becomes large, and the inner diameter near the liquid supply port 1b becomes smaller than the inner diameter of the pipe 3b. The liquid can be supplied without leaking. Further, the restoring force of the deformed connecting member 1 increases the adhesion between the alignment portion 1c and the pipe 3b, so that liquid leakage can be further prevented.

As an example of the method for manufacturing the brush member 3, a resin pipe 3b is inserted into the center of the brush body 3a, and one end of the inserted pipe 3b and one end of the brush body 3a are heated and integrally welded. A method of forming the fixed portion 3d can be mentioned. In the case of this manufacturing method, a part of the inside of the pipe 3b is melted to generate protrusions such as burrs, but the protrusions can be removed at the time of insertion by the protrusion-shaped alignment portion 1c. .. Therefore, a separate step of removing burrs is not required, and a flow path can be reliably secured.

5 (c) and 5 (d) are explanatory views showing a second embodiment of the liquid coating brush according to the present invention. The difference between the liquid coating brush 10a of the second embodiment and the liquid coating brush 10 of the first embodiment is that the alignment portion 15c is provided at the liquid receiving port 15b on the fixing portion 15a side.

As a result, the edge portion of the liquid supply port 16a of the connecting member 16 comes into contact with the inclined surface of the alignment portion 15c and is pushed downward, so that the pipe 15d is deformed and the pipe 15d presses the brush body 15e outward. The connecting member 16 and the brush body 3a communicate with each other.

6 (a) and 6 (b) are explanatory views showing a third embodiment of the liquid coating brush according to the present invention. The difference between the liquid coating brush 10b of the third embodiment and the liquid coating brush 10 of the first embodiment and the liquid coating brush 10a of the second embodiment is that the liquid receiving port 17b of the fixing portion 17a and the connecting member 18a are different. Alignment portions 17c and 18c are provided on both sides of the liquid supply port 18b on the side.

As a result, the alignment can be reliably performed. Further, the shapes of the surfaces of the positioning portions 17c and 18c in contact with each other are made substantially the same. Specifically, the inclination angles of the inclined surfaces 17d and 18d of the positioning portions 17c and 18c are substantially the same. As a result, the alignment portions 17c and 18c can be brought into close contact with each other on the surface, so that liquid leakage can be reliably prevented. Further, the inner diameter B of the pipe 18e is made larger than the inner diameter A of the liquid supply port 18b. As a result, liquid leakage can be reliably prevented. The inner diameter B of the pipe 18e may be larger than the inner diameter A of the liquid supply port 18b in the aligned state, or may be larger than the inner diameter of the liquid supply port 18b in the state before the alignment is performed. both are fine.

6 (c) and 6 (d) are explanatory views showing a fourth embodiment of the liquid coating brush according to the present invention. The differences between the liquid coating brush 10c of the fourth embodiment and the liquid coating brush 10b of the third embodiment are that the shapes of the alignment portions 19c and 20c are changed, the inner diameter of the liquid supply port 19b and the pipe 20e are changed. The point is that the inner diameters of the two are almost the same.

As described above, the shapes of the alignment portions 19c and 20c are particularly limited to the shapes of the alignment portions 19c and 20c because liquid leakage can be reliably prevented if the shapes of the surfaces in contact with each other are substantially the same. No need. Further, even when the inner diameter of the liquid supply port 19b and the inner diameter of the pipe 20e are substantially the same, liquid leakage can be reliably prevented.

7 (a) and 7 (b) are explanatory views showing a fifth embodiment of the liquid coating brush according to the present invention. In the liquid coating brush 10d of the fifth embodiment, in order to prevent the liquid supply port 21a and the liquid receiving port 22b from being misaligned, an alignment member 23 is provided between the liquid supply port 21a and the liquid receiving port 22b. There is. In FIG. 7, the alignment member 23 is substantially cylindrical and has a shape having protrusions on the outer circumference, but the shape may be any shape as long as it fills the gap between the liquid supply port 21a and the liquid receiving port 22b. Absent.

As a result, the alignment member 23 ensures that the liquid supply port 21a and the liquid receiving port 22b communicate with each other, so that the flow path can be prevented from shifting and the liquid can be prevented from leaking. Further, by using the alignment member 23 as a separate member, the assembly accuracy can be improved and the productivity can be improved. A soft material can be selected as the material of the alignment member 23, and the alignment member 23 may be strongly sandwiched between the connecting member 21 and the brush member 22 and may be in a crushed state, which is also included in the present invention. ..

The liquid coating brush according to the present invention is attached to the tip of a robot arm or the like and is used when applying a liquid to a product in a production line or the like of various products.

1 Connecting member 1a Threaded part 1b Liquid supply port 1c Aligning part 1d Flow path 2 Cover member 2a Cylindrical body 2b Inner wall surface 2c Step part 3 Brushing member 3a Brushing body 3b Pipe 3c One end 3d Fixed part 3e Liquid receiving port 3f Parts 10, 10a, 10b, 10c, 10d Brush for liquid application 11 Robot arm 12 Worktable 13 Work 14 Liquid supply path

Claims (4)

The liquid application brush is
A connecting member that has a liquid supply port and connects to the liquid supply path of the robot arm,
A cover member that is a tubular body and has a step portion on the inner wall surface of the tubular body and engages with the connecting member.
A brush body, a hollow pipe arranged substantially in the center of a cross section orthogonal to the longitudinal direction of the brush body, and a fixing portion formed by fixing one end of the brush body and the pipe are provided. Has a liquid receiving port substantially in the center, and has a brush member in which a flange portion provided on the outer periphery of the fixing portion is engaged and held by the step portion of the tubular body.
To prevent displacement of the liquid supply port and the liquid inlet opening, provided with a positioning portion at the distal end of the liquid supply port or the liquid receiving port, the alignment of the liquid supply port or the liquid receiving port The portion is a liquid coating brush characterized in that it abuts on one edge and is deformed so that the inner diameter becomes smaller. The liquid application brush is
A connecting member that has a liquid supply port and connects to the liquid supply path of the robot arm,
A cover member that is a tubular body and has a step portion on the inner wall surface of the tubular body and engages with the connecting member.
A brush body, a hollow pipe arranged substantially in the center of a cross section orthogonal to the longitudinal direction of the brush body, and a fixing portion formed by fixing one end of the brush body and the pipe are provided. Has a liquid receiving port substantially in the center, and has a brush member in which a flange portion provided on the outer periphery of the fixing portion is engaged and held by the step portion of the tubular body.
In order to prevent misalignment between the liquid supply port and the liquid receiving port, an alignment portion is provided at the liquid supply port and / or the liquid receiving port, and the pipe is integrally fixed with the fixing portion. A brush for liquid application, which is characterized by being used. The liquid coating brush according to claim 1 or 2, wherein the shape of the surface in contact between the alignment portion of the connecting member and the alignment portion of the fixing portion is substantially the same. The liquid coating brush according to any one of claims 1 to 3, wherein the inner diameter of the pipe is larger than the inner diameter of the liquid supply port.

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