JPS629979Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coating gun for an automatic coating device. Conventionally, the coating gun of an automatic coating device is fixed to the tip of one or more rotatably connected arms.

As a result, when changing the painting direction, the paint gun is rotated together with the most advanced arm, but the length from the paint injection part of the paint gun to the pivot point of the arm is relatively large, and the moment of inertia is relatively large. Because of the large size, not only is it difficult to easily change the coating direction (orientation of the paint injection port), but also it is difficult to coat the inside of a narrow space, for example, the inner wall of a folded part of a box.

The present invention was created in view of the above points,
The purpose is to paint a desired area of the surface of the object to be painted surrounding the space, regardless of the shape of the object, as long as there is a space narrow enough to accommodate the gun body. An object of the present invention is to provide a coating gun for automatic coating equipment.

According to the present invention, the object is to provide a paint gun body that injects paint, a through hole provided in the vicinity of the longitudinal center of the paint gun body in a direction perpendicular to the longitudinal direction, and one end of which is formed through the paint gun body. A shaft fitted into a hole and fixed to the painting gun body, a toothed pulley fixed to the other end of the shaft at the center of rotation, and the shaft is rotated between the toothed pulley and the painting gun body. By supporting the movable support member and running,
A timing belt meshed with the toothed pulley and stretched in order to rotate the toothed pulley about the center of the toothed pulley, and a running belt connected to the timing belt to make the timing belt run. This is achieved by a spray device consisting of a device.

Next, a preferred embodiment of the present invention will be explained based on FIGS. 1 and 2.

In the figure, 1 is a paint gun body having a paint inlet 2 and a paint injection port 3. The inlet 2 is connected to a paint supply source, and the paint 4 is injected from the injection port 3. A protrusion 5 is provided near the center in the longitudinal direction of the main body 1.
The protrusion 5 is provided with a through hole 6 in a direction B perpendicular to the paint spraying direction A. A shaft 7 is fitted into the hole 6, and a fitting end 8 of the shaft 7 is fixed to the main body 1 with a fixing screw 9. axis 7
On the other hand, there is an arm 10 of the automatic coating device as a supporting member.
It protrudes through the through hole 11 of the projecting end 1.
2 is connected via a toothed pulley 13 and a timing belt 14 to a rotational drive source such as a servo motor as a traveling device. In addition, pulley 13, belt 1
4 may be replaced by a known rotational force transmission means such as a gear. A bearing 15 is provided between the shaft 7 and the arm 10, and a spacer 16 and a retaining ring 17 are fitted onto the shaft 7 to prevent the bearing 15 and the arm 10 from moving in the B direction with respect to the shaft 7 and to receive thrust load. equipped.

In the coating gun 18 of the present invention configured as described above, the belt 14 and the pulley 13 are driven by the rotational drive source.
When the shaft 7 is rotationally displaced in the C direction to the D direction about the axis 7a, the shaft 7, which is pivotally supported by the arm 10 via the bearing 15, is rotated in the C direction to the D direction about the axis 7a. The main body 1 fixed to the shaft 7 is rotationally displaced in the C direction to the D direction about the shaft center 7a, and as a result, the injection port 3 fixed to the main body 1 is radially displaced around the shaft center 7a. It is rotationally displaced by R (distance from the axis 7a to the injection port 3) from the C direction to the D direction. Therefore, regardless of the length of the gun 18 and the arm 10, the direction of spraying the paint 4 from the spray nozzle 3 of the coating gun 18 can be changed by a relatively short radius R (a fraction of the conventional radius) (for example, A1 (A2 direction), even if the object 19 to be coated has a folded part 20 such as a box, the inner surface 21 of the folded part 20 can be uniformly coated. In order to configure the painting gun of the present invention, the arm 10 to which the shaft 7 was conventionally fixed is
On the other hand, it is only necessary to make the shaft 7 rotatable, and therefore modifications can be made at low cost.

As mentioned above, according to the present invention, the painting gun body is
A timing belt is pivotally supported for 360° rotation around a shaft fixed near the longitudinal center of the painting gun body, and is tensioned and meshed with a toothed pulley fixed to the shaft. Because it is equipped with a paint gun, the direction of the nozzle of the paint gun (paint jet direction) can be controlled in a narrow space where the main body can be accommodated.
can be easily rotated 360 degrees, and since the amount of rotational displacement of the coating gun and the travel distance of the timing belt are in direct proportion, the rotation of the coating gun can be easily maintained at a constant speed. The input of the traveling device can be constant regardless of the angle, and when positioning the direction of the injection nozzle, it can be stably positioned without wobbling, and in addition, the object to be coated has a relatively complicated shape. The surface of the object to be coated can be coated.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams of a preferred embodiment of a coating gun according to the present invention. 1... Gun body, 3... Injection port, 7a, 21a
...Axis (center axis), A, A1, A2...Paint injection direction.

Claims (1)

[Scope of utility model registration request] A painting gun body that injects paint, a through hole provided in a direction perpendicular to the longitudinal direction near the longitudinal center of the painting gun body, and one end fitted into the through hole to form a paint gun body. a toothed pulley fixed to the other end of the shaft at the center of rotation; a supporting member rotatably supporting the shaft between the toothed pulley and the coating gun body; A timing belt meshed with the toothed pulley and stretched in order to rotate the toothed pulley about the center of the toothed pulley, and a timing belt connected to the timing belt to make the timing belt run. A spray device consisting of a traveling device.