JP2645312B2 - Method and apparatus for spraying cycloids using twin guns - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention automatically applies a building coating material for protection of exterior walls and cosmetics at the time of new construction or renovation of buildings or factory production of exterior wall panels for buildings. The present invention relates to a method and an apparatus for spraying a cycloid with a twin gun for spraying.

[Conventional technology]

A method generally used in automatic coating by an air spray method is a method in which a spray gun is held in a fixed direction on an object to be coated and spray coating is performed. In this case, the trajectory drawn by the spray pattern has a certain width, but basically forms a one-dimensional straight line even when the reciprocating motion of the gun or the moving motion of the coating equipment is added.

Conventionally, a spray gun has been used to automate spraying work, in which an automatic gun is held by a multi-axis robot to perform a complicated gun operation like a human arm, and a reciprocator (reciprocating device). Are basically divided into those based on linear movements.

[Problems to be Solved by the Invention] The former method can be said to be the optimal method from the viewpoint of quality assurance because the gun can be operated freely, but the system becomes complicated and expensive. There's a problem. In addition, the latter method is inexpensive, but has a problem that spraying unevenness and stripes are likely to occur because the operation pattern of the gun is monotonous. Therefore, this problem has been conventionally dealt with by adding an operation mechanism for swinging and rotating the gun.

However, not only the spraying surface is painted out as in the case of spraying on the outer wall of a building, but when a pattern such as large or small balls or craters is required on the spraying surface, any of the above methods is sufficient. Rather, there is a problem in that the pattern distribution of balls, craters and the like is distorted, the locus of movement of the gun remains, and further, the spray thickness varies.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method and an apparatus for spraying cycloid with a twin gun which can perform spraying two-dimensionally and have less unevenness in spraying.

[Means for solving the problem]

Therefore, the method and apparatus for spraying cycloids using twin guns according to the present invention is to attach two spray guns with different turning radii to the rotating shaft, and rotate the rotating shaft while moving it linearly to form a double cycloid with two spray guns. It is characterized by spraying the gun motion trajectory,
A horizontal moving mechanism that reciprocates left and right with respect to the wall surface, and has two spray guns attached to the rotating shaft with different rotating radii, and is constituted by a twin gun device body attached to the horizontal moving mechanism. Things.

[Action]

In the method and apparatus for spraying cycloids using twin guns of the present invention, an automatic gun for building paint having a vertical conical pattern is used, and two spray guns are mounted at different positions on one rotating body with different turning radii. Since the rotating body itself is linearly moved at the same time as rotating, the spray can be performed by drawing a double cycloid trajectory. Accordingly, the material can be sprayed at the same density even in the central portion as in the upper and lower portions.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a cycloid spraying device using a twin gun according to the present invention, and FIG. 2 is a diagram showing an example in which a cycloid spraying device using a twin gun according to the present invention is mounted on an outer wall automatic spraying device. FIG. 3 is a view showing a comparative example between the single cycloid spraying and the cycloid spraying by the twin gun of the present invention. In the figure, 1 is a base, 2 is a variable speed motor, 3 and 4 are bevel gears, 5 is a bearing, 6 and 7 are spur gears, 8 is a rotary joint, 9 is a rotating shaft, 10 is a fixed nut, and 11 and 12 are An automatic gun, 13 is a plug, 14 is an L-shaped joint, 15 is a rotating shaft, 16 is a fixing device, and 17 is a guide roller.

In FIG. 1, a variable speed motor 2 is a ring cone type motor whose rotation speed can be changed, and is mounted on a base 1. The rotation of the variable speed motor 2 is transmitted to the spur gear 6 via the bevel gears 3 and 4, and the spur gear 7 meshes with the spur gear 6, and rotates the outer case of the rotary joint 8. The spur gear 7 is press-fitted into a rotary joint 8 for passing the spray material and two systems of air. At the tip of the rotary joint 8, a plug 13 for feeding material is attached.
A material pressure feeding system (not shown) such as a hose is connected to 1 and 12. The automatic guns 11 and 12 are automatic guns for building paints having a vertical conical pattern for both tile and ricin. Plug 13
A rotating shaft 9 having all screws at both ends is attached to the end of the shaft, and two automatic guns 11 and 12 are mounted on both sides of the rotating shaft 9 at different distances from the center by fixing nuts 10. These are structured to rotate together with the spur gear 7 and the rotary joint 8.

The spray material enters from the L-shaped joint 14, branches off at the tip plug 13 through the rotary joint 8,
It is pumped to 1 and 12. In addition, the rotary joint 8
For example, a rotary joint (Japanese Patent Application No. 62-231460) already proposed by the present applicant can be used. The automatic guns 11 and 12 are on / off controlled by air.

FIG. 2 shows an example in which the cycloid spraying device using the twin gun according to the present invention shown in FIG. 1 is provided in an automatic outer wall spraying device.

In FIG. 2, automatic guns 11 and 12, a rotating shaft 9,
The gun rotation assembly including the variable speed motor 2 and the like includes a base 1
Mounted on the reciprocator. The reciprocator is
It is driven horizontally by a chain, and the traversing speed can be freely adjusted by inverter control. Therefore, when the variable speed motor 2 and the reciprocator are operated at the rotation speed and the traverse speed of the gun suitable for the spray material and the main material pattern, double cycloid spray can be realized. The fixing device 16
Further, the guide roller 17 is for stabilizing the spray density by keeping the distance from the spray wall surface constant.

That is, when the rotation of the variable speed motor 2 is transmitted to the spur gear 6 via the bevel gears 3 and 4 and further transmitted from the spur gear 6 to the spur gear 7, the rotary joint 8 and the plug 1
3. The rotating shaft 9 and the automatic guns 11 and 12 rotate integrally about the rotating shaft 15. At this time, automatic gun 11,
Because the 12 mounting positions are at different distances from the center of rotation,
The automatic guns 11, 12 rotate at different radii. Therefore, when the reciprocator is operated at a predetermined traversing speed and the base 1 is horizontally moved (moved in the horizontal direction), a gun operation trajectory of a double cycloid having a different radius is drawn. FIG. 3 (a) shows a double cycloid trajectory by the two guns of the present invention.
FIG. 3B shows a cycloid trajectory by one gun.

As is apparent from a comparison between FIGS. 3A and 3B, in the cycloid trajectory by one gun, the spray density in the central portion is lower than in the upper and lower portions, but in the double cycloid trajectory, a fixed width is obtained. Spraying the central part of the density can be doubled.

〔The invention's effect〕

As is clear from the above description, according to the present invention, 2
Since the two gun movement paths have a combined shape, no gun trajectory remains on the spraying surface, and unevenness in the spraying can be eliminated. As for the single cycloid spray coating, for example, the magazine “Painting and Paint” 81.9 (No943), pages 71 to 78, has already been introduced under the title “Theory and Practice of Cycloid Painting”, In the case of this cycloid spraying, a difference in the spray thickness tends to occur at the upper and lower centers. In this regard, in the present invention, since the cycloid spraying with different diameters is performed by the two guns having different turning radii, such a thickness variation can be reduced. Further, since the overlapping spraying can be performed by the two guns, the probability of occurrence of pinholes is reduced, and by combining the linear motion and the rotating motion with the two guns, the spraying width can be increased, and the working efficiency can be improved. Can be improved. Also,
Since the system is constituted by the reciprocator and the rotating mechanism of the gun, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a cycloid spraying device using a twin gun according to the present invention, and FIG. 2 is a diagram showing an example in which a cycloid spraying device using a twin gun according to the present invention is mounted on an outer wall automatic spraying device. FIG. 3 is a view showing a comparative example between the single cycloid spraying and the cycloid spraying by the twin gun of the present invention. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Variable speed motor, 3 and 4 ... Bevel gear, 5 ... Bearing, 6 and 7 ... Spur gear, 8 ... Rotary joint, 9 ... Rotary shaft, 10 ... Fixed nut , 11
And 12 ... automatic gun, 13 ... plug, 14 ... L-shaped joint, 15 ... rotating shaft, 16 ... fixing device, 17 ... guide roller.

Claims (2)

(57) [Claims] 1. A method for spraying a gun operation trajectory of a double cycloid with two spray guns by attaching two spray guns with different turning radii to a rotating shaft and rotating the rotating shaft while moving linearly. Features a cycloid spraying method using twin guns. 2. A horizontal moving mechanism reciprocating left and right with respect to a wall surface, and a twin gun device body having two spray guns mounted on a rotating shaft with different rotating radii and mounted on the horizontal moving mechanism. A cycloid spraying device using twin guns.