JP4397250B2 - Spray gun for painting - Google Patents

Description

  The present invention relates to a spray gun for painting, and more particularly, to a spray gun for painting that enables creation of coating trajectory data accurately and easily by using a light beam.

  In recent years, in the field of painting, when a large amount of an object to be coated (hereinafter referred to as “work”) is painted, a method of automatically painting using a painting robot has been adopted.

  In painting using such a painting robot, it is necessary to calculate the trajectory data of the spray gun in the painting robot in advance based on the outer dimensions of the workpiece and store the trajectory data in the painting robot. This work is generally called “teaching”.

  By this teaching, the painting robot can move the spray gun based on the taught trajectory data, thereby automatically painting the workpiece. Therefore, in the painting using such a painting robot, especially when a plurality of workpieces are to be painted, it is possible to reduce labor costs and the like, and to accurately apply the same coating to all the workpieces. There is an advantage that can be performed.

  By the way, in general, the teaching is performed by actually moving the spray gun in a state where a workpiece is installed and storing the X and Y coordinates of the moved spray gun in a computer such as a personal computer. However, at this time, conventionally, a rod-shaped object is attached to the tip of the spray gun, thereby determining the coordinates of the spray gun.

  In other words, by assuming that the tip of the stick attached to the tip of the spray gun is the coating destination of the paint on the workpiece, the position of the spray gun when the tip of the stick is located at a desired location on the workpiece Teaching data was created.

  However, when teaching is performed by attaching a stick to the spray gun, the stick attached to the tip may be caught by a workpiece or the like, and the work has to be complicated.

  In addition, when a rod is attached in this way, strictly speaking, there is a slight error between the paint adhesion position on the workpiece and the tip position of the rod, so correction is necessary to create accurate trajectory data. The problem that is necessary is also considered.

In this regard, conventionally, a method of performing optimal coating using a light beam such as a laser beam has been proposed, and by applying this method, the problem that the rod is caught on the workpiece etc. can be solved. Even in such a case, these methods are not intended for teaching purposes, and it is necessary to provide a light source separately from the spray gun. It is difficult to do.
Japanese National Patent Publication No. 11-50091 Japanese Patent Laid-Open No. 08-192096 JP-A-56-102966 JP-A-56-102965 Japanese Utility Model Publication No. 61-61053

  Accordingly, an object of the present invention is to provide a spray gun for painting that can be taught more easily and accurately, particularly when creating orbit data for painting.

The spray gun for painting of the present invention is
Spray gun body,
The paint gun body has a paint supply port at an arbitrary position and has a paint discharge port at the tip of the spray gun body, and an air supply port at an arbitrary position. A flow path for atomizing air having an atomizing air injection port around the paint discharge port, and a pattern air having an air supply port at an arbitrary position and a pattern air injection port around the paint discharge port A flow path,
A needle which is inserted into the spray gun body so as to be movable in the longitudinal direction of the spray gun body, and which is capable of closing the paint discharge port at the tip when moved to the tip side of the spray gun body; In a spray gun for painting having
A through hole is formed in the needle along the longitudinal direction thereof, and a light emitting means is provided on the rear end side of the through hole so that a light beam can be irradiated toward the front of the paint discharge port. .

  In the spray gun for painting of the present invention, a needle whose opening and closing of the paint discharge port is formed with a through hole along its longitudinal direction, and a light emitting means is provided on the rear end side of the through hole, whereby the needle It is possible to irradiate a light beam through the front of the spray gun.

  Therefore, when teaching using the spray gun for painting of the present invention, in particular, without attaching a rod or the like to the tip of the spray gun, only irradiating the light beam from the light emitting means toward the front of the spray gun, The location of the paint on the workpiece can be ascertained, whereby the trajectory of the spray gun can be stored in a personal computer or the like.

  Therefore, according to the present invention, teaching work is extremely easy, and since the light beam is irradiated forward from the paint discharge port, it is possible to grasp the position where the paint is applied more accurately.

  In the spray gun for painting of the present invention, a paint channel is formed inside the spray gun body, and the paint channel has a paint supply port that is open on the side of the spray gun body, A paint discharge port is provided at the tip of the spray gun body.

  The spray gun main body has an air supply port that is open on the side of the spray gun main body, an atomizing air flow path having an injection port around the paint discharge port, and a spray A pattern air flow path having an air supply port opened on the side surface side of the gun body and provided with an injection port around the paint discharge port is formed.

  Furthermore, in the spray gun body, when it is moved to the tip side of the spray gun body, the paint discharge port can be closed at the tip portion so that it can be moved in the longitudinal direction of the spray gun body. The paint needle can be discharged from the paint discharge port by retracting the needle while supplying the paint to the paint channel.

  The needle has a through hole formed along its longitudinal direction, and has a light emitting means on the rear side of the through hole, whereby a light beam is directed toward the front of the paint discharge port. Can be irradiated.

  An embodiment of a spray gun for painting (hereinafter simply referred to as “spray gun”) of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view for explaining the structure of the spray gun of this embodiment. In the figure, 1 is the spray gun of this embodiment.

  In the spray gun 1 according to the present embodiment, the main body 201, the cap 202 connected to the distal end of the main body, and the base end 204 connected to the rear of the main body 201 are used. Is configured.

  A paint flow path 3 is formed inside the spray gun 1, and the paint flow path 3 includes a paint supply port 301 that is open to the outside on the side surface side of the spray gun 1. The spray gun 1 is provided with a paint discharge port 302 substantially at the center of the tip thereof, so that the paint supplied from the paint supply port 301 can be discharged from the paint discharge port 302 through the inside of the spray gun body 2.

  Next, in the figure, 4 is an atomizing air flow path. That is, in this embodiment, an atomizing air injection port 402 having an opening is formed around the coating material discharge port 4, and this atomization is performed. The atomizing air flow path 4 in which the atomizing air supply port 401 having the other end opened to the outside at the side portion of the spray gun 1 is communicated with the air injection port 402. By spraying air toward the tip of the spray gun 1 around the paint discharge port 402 through the flow path 4, the paint discharged from the paint discharge port 402 is atomized and atomized. The paint can be sprayed toward the tip of the spray gun 1.

  Further, a pattern air flow path 5 is formed in the spray gun 1 for changing the pattern of the paint atomized by the air jetted from the atomizing air jet port 402.

  Since the atomizing air channel 4 is open around the tip of the coating material discharge port 402, the coating material atomized by the atomizing air has a substantially circular shape. Is difficult to inject. Therefore, in the spray gun 1 in the present embodiment, air is sprayed onto the atomized paint through the pattern air flow path 5, thereby changing the pattern of the atomized paint to a substantially elliptical shape. The paint can be sprayed over a wider range.

  That is, in the present embodiment, the inner peripheral side of the tip end portion of the cap portion 202 is substantially tapered to form a tapered portion 203, while the pattern air flow path 5 is formed in the taper portion 203 at the paint. While having a pair of pattern air injection ports 502 arranged so as to sandwich the discharge port 402, the other end portion is opened toward the outside at the side portion of the spray gun 1, and this opening is an air supply port 501. . And by this structure, it is possible to change the circular atomized paint to the substantially elliptical atomized paint by injecting the pattern air from the tapered portion 203 through the pattern air injection port 502, thereby The paint can be sprayed over a wide range.

  Next, the needle 6 is inserted into the spray gun 1 so as to be movable in the longitudinal direction of the spray gun 1 while penetrating the paint flow path 302, and the tip of the needle 6 is tapered. Thus, when the needle 6 is moved to the tip side of the spray gun 1, the paint discharge port 302 can be closed at the tip portion of the needle 6.

  Further, the needle 6 is supported by a piston 7 at the rear thereof, and the piston 7 is biased toward the distal end side of the spray gun body 2 by a piston spring 8 and supplies air from the driving air supply port 10. Thus, the piston 7 is moved to the piston spring 8 side, so that the needle 6 can be retracted.

  Therefore, in this state, the tip of the needle 6 closes the paint discharge port 302 in a normal state. On the other hand, by moving the piston 7 to the rear side, the needle 6 is retracted and the paint discharge port 302 is moved. Can be opened.

  In the drawing, 12 is a needle adjuster, and 13 is a lock nut. In the spray gun 1 in this embodiment, the needle adjuster 12 is rotated to position the needle 6 in the longitudinal direction. Adjustable. In the figure, 14 is a power cable for supplying power to the light emitting means 9, and 11 is an O-ring for sealing.

  Next, the needle 6 will be described. In the present embodiment, the needle 6 is formed with a through hole 601 penetrating from the front end to the rear end, thereby forming a hollow cylindrical shape as a whole.

  Further, on the rear side of the needle 6, more specifically, on the rear side of the through hole 601, a light emitting means 9 having a light source is disposed inside the spray gun 1.

  That is, in the figure, 9 is a light emitting means. In this embodiment, the light emitting means 9 collects a laser 901 as a light source, a power source 902 for driving the laser 901, and light emitted from the laser 901. And a condensing lens 903 for irradiating, and by irradiating the laser beam from the laser 901, the inside of the through hole 601 in the needle 6 and the paint discharge port 302 are directed toward the front of the spray gun 1. Can be irradiated with laser light.

  2 is an enlarged cross-sectional view of the tip side portion of the spray gun 1. In FIG. 2, reference numeral 602 denotes glass disposed at the tip of the needle 6. That is, in this embodiment, the needle 6 A glass 602 is attached to the tip of the formed through-hole 601, and the glass 602 prevents the paint from flowing back into the needle 6. Therefore, the glass 602 is made of a material that can transmit laser light and has solvent resistance.

  Next, the teaching method using the spray gun 1 of the present embodiment configured as described above will be described. When teaching is performed using the spray gun 1 of the present embodiment, first, a work is actually applied. In the same manner as in the case, the work is fixed to a jig or the like, a teaching personal computer or the like is set, the power source 902 is turned on, and the laser light is emitted from the laser 901. Move to the work in the same order as when actually painting.

  Then, the laser beam hits a part of the workpiece where the paint sprayed from the spray gun 1 adheres, so that the X, Y coordinates, etc. of the spray gun when painting the desired part of the workpiece can be accurately grasped. It becomes possible.

  At this time, in the spray gun of the present embodiment, unlike the conventional method of attaching a stick or the like to the tip and grasping the movement distance of the spray gun, the teaching work is easily performed without the stick being caught on the work or the like. It becomes possible.

  In addition, since the laser beam is irradiated through the needle for closing the coating material discharge port, the laser beam can be used to indicate almost the same location as the workpiece where the coating material sprayed from the spray gun adheres. Teaching can be performed.

  In the present embodiment, a laser is used as the light source 901. However, a laser is not necessarily used, and another light source may be used.

  In the spray gun 1 shown in FIG. 1, the case where the light emitting means 9 is provided inside the spray gun 1 has been described. However, in the spray gun of the present invention, the light emitting means 9 is not necessarily provided inside the spray gun 1. The light emitting means 9 may be provided on the rear side of the through hole 601 formed in the needle 6.

  For example, FIG. 3 is a cross-sectional view showing another configuration example 21 of the spray gun of the present invention. In the spray gun 21 shown in FIG. 3, the light emitting means 9 is disposed on the rear side of the needle adjuster 12. . That is, in the spray gun 21 shown in FIG. 3, the rear side of the through hole 601 formed in the needle 6 in the spray gun 1, the lock nut 13 and the needle adjuster 12 can be transmitted and the rear side of the needle adjuster 12. The light emitting means 9 is arranged on the side, so that the laser light from the light emitting means 9 can be irradiated toward the front of the spray gun 21 through the through hole 601 of the needle 6. Thus, the light emitting means 9 can be removed after teaching.

  Note that the spray gun 21 shown in FIG. 3 is characterized in that the light emitting means 9 is disposed behind the needle adjuster 12, and the other components are the same as the spray gun 1 shown in FIG. Portions are denoted by the same reference numerals and redundant description is omitted.

  Since the spray gun of the present invention can accurately grasp the position of the work to which the paint sprayed from the spray gun adheres, it is widely used not only for teaching work but also for controlling the movement of the spray gun. It is possible to apply.

It is sectional drawing for demonstrating the Example of the spray gun of this invention. It is sectional drawing to which the front-end | tip part in the Example of the spray gun of this invention was expanded. It is sectional drawing for demonstrating the other structure of the spray gun of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spray gun 201 Main body part 202 Cap part 203 Base end part 3 Paint flow path 301 Paint supply port 302 Paint discharge port 4 Atomization air flow path 401 Air supply port 402 Atomization air injection port 5 Pattern air flow path 501 Air supply port 502 Pattern air injection port 6 Needle 601 Through-hole 602 Glass 7 Piston 8 Piston spring 9 Light emitting means 901 Light source (laser)
902 Power supply 903 Condensing lens 10 Driving air supply port 11 O-ring 12 Needle adjuster 13 Lock nut

Claims (2)

Spray gun body,
A paint flow path (3) having a paint supply port (301) at an arbitrary position formed in the spray gun body and having a paint discharge port (302) at the tip of the spray gun body (2). ), An atomizing air flow path (4) having an air supply port (401) at an arbitrary location and having an atomizing air injection port (402) around the paint discharge port (302), and an optional A pattern air flow path (5) having an air supply port (501) at a location and a pattern air injection port (502) around the paint discharge port (302);
The spray gun main body (2) is inserted into the spray gun main body so as to be movable in the longitudinal direction, and the paint discharge port (302) is closed at the front end when the spray gun main body is moved to the front end side. An enabled needle (6);
In a spray gun for painting having
A through hole (601) is formed in the needle (6) along the longitudinal direction thereof, and a light emitting means (9) is provided on the rear end side of the through hole (601), and the front of the paint discharge port (302) is provided. A spray gun for painting, characterized in that it can be irradiated with a light beam toward The spray gun for painting according to claim 1, characterized in that the light emitting means (9) is a laser.

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