JPH04110157U - Reciprocator for painting - Google Patents

Abstract

(57) [Summary] [Configuration] There are two upper and lower sprockets between sprockets 5, 6 and 8, 9.
A set of endless chains 10a and 10b are strung together,
By driving the sprockets 6 and 8 on the same shaft 7 with the motor 12, both endless chains circulate in the same direction at the same time, and the separately connected movable members 14a and 14b have the same stroke L ₁ in the upper and lower directions, respectively. Reciprocating motion with _L2 . Spray guns 15a and 15b are attached to each movable member, respectively. [Effect] When painting a vertically long object, each spray gun is divided into upper and lower painting areas and reciprocates with small strokes, so the paint spray path to the painted surface is finely formed and uneven coating is prevented. The number of installed reciprocators is 1
A stand is sufficient and the installation area can be reduced.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention uses a spray gun in front of the workpieces that are sequentially conveyed by a conveyor. A painting recipe used for automatic painting by ejecting paint while reciprocating up and down. Regarding procator.

0002

[Problems to be solved by conventional techniques and ideas]

Conventionally, as automatic coating equipment, the object to be coated is conveyed horizontally by a conveyor. A reciprocator installed near the conveyor moves the spray gun up and down. It is known that the paint is applied sequentially by ejecting paint while making a backward movement. . In this case, the travel path of the spray gun relative to the painted surface of the workpiece, that is, the The eruption path will be a zigzag path.

0003 By the way, such automatic coating equipment can be used to coat objects with long vertical dimensions. One method is to use a long stroke reciprocating process that corresponds to the dimensions of the workpiece. One spray gun is reciprocated over the entire length of the object to be coated, using a However, since it takes time to move one stroke, the above There are wide gaps between the zigzag paths, making it easy to get uneven paint.

0004 Therefore, in the past, strokes corresponding to the upper and lower halves of the painted surface of the workpiece were used. A method was adopted in which the top and bottom were painted separately using two reciprocators with short arcs. There is. However, this method can narrow the gap between the paint ejection paths and Although the problem of uneven coating can be solved, the lower edge of the upper coating area and the upper edge of the lower coating area A new problem arises when the film thickness increases in the overlapping region. To resolve this , the bottom of the stroke of the upper spray gun and the stroke of the lower spray gun. It is effective to control the spraying of paint to stop at a certain length at the top of the arc. However, since the two reciprocators need to be controlled separately, the control system is It has become complicated, and it has been difficult to control both in an accurate manner. Also, 2 Since a reciprocator is used, a large installation area must be taken up. There were also some drawbacks.

[0005]

[Means to solve the problem]

The painting reciprocator of the present invention was devised in view of the above points, and Two sets of endless chains that can run vertically between a pair of sprockets. The sprockets on the drive side of each endless chain are connected to a common drive source. The two movable members separately connected to each endless chain are arranged in the same way in the upper and lower two stages. It is configured to move reciprocatingly with a stroke of , and a spray gun is attached to each movable member. The configuration was as follows.

[0006]

[Function and effect of the idea]

The present invention has the above configuration, and the upper and lower endless chains are driven by a common drive source. Then, the spray guns installed in the upper and lower tiers spray the upper half and the upper half of the painted surface of the object, respectively. Sprays paint while reciprocating vertically with the same stroke at a position corresponding to the lower half. Then the paint is applied.

[0007] In other words, according to the reciprocator of the present invention, the upper and lower spray guns are each short. A zigzag spray of paint is formed on the painted surface due to the reciprocating movement of the stroke. This is caused by too much space between the paths, such as when taking a long stroke. The occurrence of uneven coating is reliably prevented. Moreover, only one reciprocator is installed. The installation area can also be reduced since only one unit is required.

[0008] Also, both spray guns are now powered by a common drive source. For example, the position of the spray gun can be detected based on the rotation speed of the drive shaft, etc., and paint can be spouted out. When you want to control stop and stop, you only need one control system and the configuration is easy. Of course, there is an effect that accurate control can be expected.

[0009]

【Example】 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

0010 In the figure, X is a workpiece that has a long dimension in the vertical direction and is suspended by hanger 1. It is lowered and conveyed horizontally by a conveyor 2.

[0011] A reciprocator 3 according to the present invention is installed on the side of the conveyor 2 at the coating position. It is placed. This reciprocator 3 has an upper driven sprocket 5 and a middle The upper endless chain 10a is also connected to the drive sprocket 6 at the central position. A drive sprocket 8 fixed coaxially with the drive shaft 7 of the drive sprocket 6, and a lower A lower endless chain 10b is stretched between the driven sprocket 9 and the driven sprocket 9 in the opposite position. It is. The above drive shaft 7 is connected to the output shaft of the motor 12 by a transmission chain 13. The rotation of the motor 12 causes both endless chains 10a and 10b to move in the same direction at the same time. The train now runs in a circular manner.

[0012] Movable members 14a and 14b that can be raised and lowered along an unillustrated lifting guide are connected to each of the endless chains 10a and 10b, respectively. When the endless chains 10a and 10b circulate, the upper movable member 14a The lower movable member 14b reciprocates with a stroke L ₁ at the upper position, and the lower movable member 14b reciprocates with the same stroke L ₂ at a slightly overlapping position below. The movable members 14a and 14b reciprocate in the same phase, and the vertical center of the object X is the center of the overlapped portion of the strokes _L1 and _L2 . They are hung in a matching manner. An upper spray gun 15a and a lower spray gun 15b, several of which are arranged in parallel, are attached to each movable member 14a, 14b.

[0013] The reciprocator 3 also includes a drive shaft 7 of the endless chains 10a and 10b. An element that is connected and detects the position of the spray guns 15a, 15b based on the number of rotations thereof. Equipped with encoder 17, paint is ejected from spray guns 15a and 15b. and a control device (not shown) that controls stopping.

[0014] This embodiment has such a structure, and the object to be coated X is transported to the front of the reciprocator 3. 2, the upper and lower spray guns 15a, 15b are applied to the object X. As shown in the figure, the paint is spouted while traveling on zigzag paths A and B with the same phase. The upper and lower halves of the veneer are painted separately. That is, each spray gun 15a, 15b reciprocates with a small stroke of approximately half the vertical length of the object to be coated , compared to the case where the object X is reciprocated with a large stroke that covers the entire length of the object The spacing between the zigzag paths is kept narrow, and uneven coating caused by too much spacing is avoided. I can't get over it.

[0015] If the paint is applied in two stages, upper and lower, as described above, the paint will be overcoated in the central part S of the object to be coated, where the spray areas of the paint overlap, but the Using the position signals of the guns 15a, 15b, the spraying of paint is stopped at a certain length at the upper and lower ends of the stroke of each spray gun 15a, 15b, i.e., as shown by the dashed line in the zigzag paths A and B. By stopping the spouting of paint in these areas and limiting the paint spouting area to areas H ₁ and H ₂ , overcoating of paint in the central area S is eliminated, and at the same time, from the top and bottom edges of the object to be coated You can save paint by reducing the amount of paint that spills out.

[0016] In addition, as mentioned above, the upper and lower ends of the strokes of each spray gun 15a, 15b are For example, as shown in Fig. When the objects to be coated Y and Y are hung in two stages, the upper and lower paint ejection areas are areas H shown in Figure 4. ₃ ,H_FourBy limiting the amount of paint to It is possible to apply a coating without any scratches.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the paint ejection path.

FIG. 3 is an explanatory diagram of another embodiment in which the coating mode is different.

FIG. 4 is an explanatory diagram of the paint ejection path.

[Explanation of symbols]

X, Y: Object to be coated 2: Conveyor 3: Reciprocator
5, 6, 8, 9: Sprocket 7: Drive shaft 10a,
10b: Endless chain 12: Motor 14a, 14
b: Movable member 15a, 15b: Spray gun

Claims (1)

[Scope of utility model registration request] 1. A painting reciprocator that is installed near a conveyor that conveys objects to be coated in a horizontal direction and is used to reciprocate a spray gun up and down in front of the objects to be coated, the reciprocator having a pair of sprockets. Two sets of endless chains are installed vertically and vertically between the two, and the sprockets on the drive side of each endless chain are connected to a common drive source, and each of the endless chains is separately connected to the other. A reciprocator for painting, characterized in that two connected movable members are reciprocated in upper and lower stages with the same stroke, and the spray gun is attached to each of the movable members.