JPH0737354U - Automatic painting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the size and improve the coating quality, and to adjust the mutual intervals of the coating machines more quickly and accurately. [Structure] Each of the coating machines (10M, 10L, 10) arranged outside the effective movement range of the adjacent coating machine sliding portion 15L.
Drive mechanism 20 for reciprocating R) while maintaining a constant mutual interval, and adjacent coating machines (10M, 10L, 10).
R) is provided with a space adjusting mechanism 30 for connecting the space so that the space between them can be adjusted individually.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic coating device for coating an upper surface portion of an object to be coated (for example, a ceiling portion of a car body, a bonnet portion, a trunk portion).

[0002]

[Prior art]

 For example, FIG. 4 shows a conventional configuration of an automatic coating device for coating the upper surface of an automobile body (Jun. 4-1933). In the figure, 2 is a column, 3 is an elevating platform, 4 is a horizontal axis, 5 is a swing arm, 6 is a tilt body, and 10 is a bell-type electrostatic coating machine. When painting the upper surface portion Wu of the vehicle body W, the elevating platform 3 is moved up and down according to the shape of the vehicle body W and the transport speed, and the swing arm 5 is swung with the mounting portion 8 as a fulcrum. Further, if necessary, the tilt body 6 is rotated about the mounting shaft 9.

By the way, under the present circumstances in which the shape of the automobile body W is complicated and diversified and a multi-product small-quantity production system is often adopted, according to the shape of the automobile body W or the like, the mutual spacing between the coating machines 10 is increased. It is convenient if you can adjust.

Therefore, the applicant of the present invention has proposed an automatic coating device provided with a space adjusting mechanism capable of adjusting the mutual space between the coating machines 10 (Japanese Utility Model Laid-Open No. 2-20960).

As shown in FIG. 5, such a space adjusting mechanism uses a slider crank mechanism to adjust the space between, for example, two coating machines 10 and 10. A sliding base 72 slidably supported, two link arms 74, 74 connecting two points symmetrically located from the center of rotation of the rotating body 73 and one end of each sliding base 72, respectively. It is composed of a fluid cylinder 75 for rotating the rotating body 73. By rotating the rotating body 73 in the forward (or reverse) direction, the coating machines 10, 10 can be moved closer (or separated) by the same distance to adjust the mutual spacing.

[0006]

[Problems to be solved by the device]

 By the way, all of the above-mentioned automatic coating devices move the tilt main body 6 (each coating machine 10) laterally by swinging the swing arm 5, so that a large amount of power is required to swing the arm 5. Then, the arm drive mechanism (for example, the crank drive device of Japanese Examined Patent Publication No. 5-305030) becomes large. As a result, there is a problem that it is difficult to comply with the recent demand for smaller equipment.

Further, the tilt main body 6 (each coating machine 10) cannot be laterally moved in a state where the horizontal level is constant, and the spacing between each coating machine 10 and the upper surface Wu of the automobile body fluctuates during coating. Will end up. This is a problem that cannot be ignored nowadays when further improvement in coating quality is required.

Therefore, it is conceivable to lengthen the swing arm 5 to reduce the upward and downward displacement when the tilt main body 6 is moved laterally. In this case, the distance between the horizontal shaft 4 and each coating machine 10 is increased. Is further increased, which leads to a larger size of the entire apparatus. Moreover, since the interval adjusting mechanism is configured to adjust the mutual intervals of all the coating machines 10 at once, the load on the drive source (fluid cylinder 75) is large and the drive source (75) is large. It becomes a factor of increasing the size of the device, and it becomes difficult to further speed up the interval adjustment and improve the accuracy.

In order to speed up the interval adjustment, as shown in FIG. 6, a screw drive mechanism (a screw shaft 76L, which is connected through a gear box 79 and is rotationally driven in opposite directions at a constant speed). 76R and sliding members 78L, 78R having nut members 77, 77 screwed to the screw shafts 76L, 76R, etc.), the left and right coating machines 10, 10 are brought closer to the central coating machine 10. An automatic coating device for separating and adjusting the gap has been developed (Japanese Patent Laid-Open No. 3-109958). However, during coating, metal powder, oil, etc. fall from the screw shafts 76L, 76R onto the upper surface Wu of the automobile body. There is a risk that the coating quality will be reduced.

In view of the above-mentioned circumstances, an object of the present invention is to provide an automatic coating apparatus which can be downsized and the coating quality can be improved and which can adjust the mutual intervals of the respective coating machines more quickly and accurately. Especially.

[0011]

[Means for Solving the Problems]

 The automatic coating apparatus according to the present invention is an automatic coating apparatus in which a plurality of coating machines are independently laterally supported by a guide member via respective sliding parts, and the effective moving range of the adjacent sliding parts of the coating machines. A drive mechanism is installed on the outer side to move each coating machine back and forth while keeping the mutual spacing constant, and an interval adjustment mechanism that connects adjacent coating machines so that the mutual spacing can be adjusted individually. It is characterized by that.

[0012]

[Action]

 In the present invention having the above structure, when the driving mechanism is driven, the plurality of coating machines reciprocate laterally along the guide member while maintaining a constant mutual interval. As a result, the coating can be performed without changing the distance between each coating machine and the upper surface of the object to be coated. Therefore, it is not necessary to provide a swing arm as in the conventional case, and since the drive mechanism is provided outside the effective movement range of the sliding part of the adjacent coating machine, the vertical movement of the drive mechanism and each coating machine can be prevented. The distance between the directions can be reduced, and the size can be easily reduced.

Further, it is possible to effectively prevent oil (grease) and the like from dropping from the drive mechanism to the upper surface of the object to be coated, and it is possible to coat with high quality.

In addition, since the space between adjacent coating machines is individually adjusted using the space adjustment mechanism, the load on the mechanism is significantly reduced compared to the conventional example, and the space adjustment is performed quickly and accurately. Can be done.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, this automatic coating apparatus has the same basic configuration as the conventional example (FIG. 4), and a plurality (3) of coating machines (10M, 10L, 10R) are used. A drive mechanism 20 for reciprocating while maintaining a constant gap is provided outside the effective movement range of the adjacent coating machine sliding portion (15L), and the adjacent coating machines (10L, 10M, 10M. 10R) are individually connected by a distance adjusting mechanism 30 so that the distance can be adjusted. The same components as those in the conventional example (FIG. 4) are designated by the same reference numerals, and the description thereof will be omitted or simplified.

First, the drive mechanism 20 is arranged outside the effective movement range of the adjacent coating machine sliding portion 15L, and reciprocates while maintaining a constant mutual spacing between the coating machines (10M, 10L, 10R). It is a means for lateral movement.

In this embodiment, the drive mechanism 20 uses the gap adjusting function of the coater (10L and 10M, 10M and 10R) for maintaining the gap between the coaters (10M, 10L, 10R) as a guide member. It is configured to be horizontally movable back and forth along the (guide rail 19).

More specifically, the drive mechanism 20 is formed so that the central coating machine 10M among the three coating machines (10M, 10L, 10R) can be moved and driven along the guide rail 19. As shown in FIG. 1, it includes a screw shaft 21, a nut member 23, a connecting rod 24, and a drive motor (servo motor 25). The screw shaft 21 is rotatably provided on the left side in FIG. 2 in the tilt main body 6 via bearings (22L, 22R) so that the shaft center thereof extends along the extending direction of the guide rail 19. In the present embodiment, the screw shaft 21 is a ball screw, and the driving force is transmitted from the servo motor 25 via the belt transmission mechanism 26 (the toothed pulleys 27, 28, the toothed belt 29) and rotated. It is said that.

The servo motor 25 is arranged so that the distance from the screw shaft 21 is as small as possible. As a result, the vertical size of the tilt main body 6 is reduced, and in combination with the swing arm (5) not being provided, the entire apparatus is greatly downsized as compared with the conventional example (FIG. 4). Further, below the screw shaft 21, an oil receiver 49 for receiving oil (grease) and the like dropped from the screw shaft 21 is provided.

The nut member 23 is movably provided along the guide rail 19 and is screwed with the screw shaft 21. Therefore, when the screw shaft 21 is rotated in the forward (or reverse) direction, the nut member 23 horizontally moves in the left (or right) direction in FIG. The nut member 23 and the central coating machine sliding portion 15M are connected by a connecting rod 24.

The space adjusting mechanism 30 is composed of a central coating machine 10M, a left side coating machine 10L, and fluid cylinder devices 31L and 31R which individually connect the coating machine 10M and the right side coating machine 10R so that the mutual space can be adjusted. There is. The fluid cylinder device 31L (31R) is extended in the lateral direction, its base end is attached to the central coating machine sliding portion 15M, and the tip end of the piston rod 32 is the coating machine sliding portion 15L ( 15R). In this fluid cylinder device 31L (31R), the piston rod 32 is projected and retracted by a predetermined length by a working fluid supplied via a pipe or the like (not shown), and the coating machine 10L (10R) is moved toward or away from the coating machine 10M. It is configured to let.

Next, the operation of this embodiment will be described. When the servomotor 25 of the drive mechanism 20 is driven to rotate the screw shaft 21 in the forward and reverse directions by a set angle, the horizontal level of the coating machine 10M in the center as well as that of the left and right coating machines (10L, 10R) is kept constant. While synchronously maintaining the above condition, the robot laterally reciprocally moves within the range of the maximum stroke S1. At this time, since the drive mechanism 20 is provided outside the effective movement range of the adjacent coating machine sliding portion 15L and further includes the oil receiver 49, the drive mechanism 20 may temporarily evade metal powder during coating. Even if oil, grease, or the like falls, it does not adhere to the vehicle body W of the vehicle and can be coated with high quality.

Further, the fluid cylinder device 31L (31R) is used to individually adjust the mutual spacing between the adjacent coating machines (10L and 10M, 10M and 10R), so that the device 31L (31R) is applied. The burden is greatly reduced compared to the conventional example, and the interval adjustment can be performed quickly and accurately.

Therefore, according to this embodiment, the drive mechanism 20 for moving and driving the central coating machine 10M is provided outside the effective movement range of the adjacent coating machine sliding portion 15L, and each adjacent coating machine ( 10L and 10M, 10M and 10R) are connected to each other by fluid cylinder devices (31L and 31R) so that their mutual intervals can be adjusted individually, so that downsizing and improvement of coating quality can be achieved and coating machine ( The mutual spacing of 10M, 10L, 10R) can be adjusted more quickly and accurately.

Further, since the drive mechanism 20 is used to move and drive the central coating machine sliding portion 15M, the entire coating machine (10M, 10L, 10R) can be guided more smoothly without losing the balance. It can be moved back and forth along the rail 19.

Further, since the space adjusting mechanism 30 is constituted by the fluid cylinder devices (31L, 31R) extending in the lateral direction, it is not necessary to take up a large installation space in the vertical direction, and the tilt main body 6 (and thus the entire device). ) Can be further miniaturized.

Further, since the oil receiver 49 is provided below the screw shaft 21, even if metal powder, oil (grease) or the like falls from the drive mechanism 20 during coating, the oil receiver 49 adheres to the vehicle body W 1. There is nothing to do and it can be painted with high quality.

In the above embodiment, the drive mechanism 20 is used to move and drive the central coating machine sliding portion 15M so that the entire coating machine (10M, 10L, 10R) is guided along the guide rail 19. Although the configuration is such that the coating machines (10M, 10L, 10R) are reciprocally moved laterally, any configuration may be adopted as long as the coating machines (10M, 10L, 10R) can be reciprocally moved laterally while maintaining a constant mutual interval. For example, other coating machine sliding parts (15L, 15R) may be moved and driven by the drive mechanism 20 to reciprocate the entire coating machine (10M, 10L, 10R) laterally. Although the number of coating machines installed is three, it may be two or four or more.

[0029]

[Effect of device]

 As described above, according to the present invention, the drive mechanism, which is arranged outside the effective movement range of the sliding portion of the adjacent coating machine, moves the coating machines back and forth while keeping the mutual spacing constant, and the adjacent coating machines. Since the structure is provided with a space adjustment mechanism that connects each other so that the space between them can be adjusted individually, it is possible to reduce the size and improve the coating quality, and to adjust the space between each coating machine more quickly and accurately. be able to.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

FIG. 2 is a view showing a state in which a driving mechanism, each coating machine, and a space adjusting mechanism are mounted on a tilt main body.

FIG. 3 is likewise a diagram for explaining the overall configuration.

FIG. 4 is a diagram for explaining a conventional configuration of an automatic coating device.

FIG. 5 is also a diagram for explaining an example of a space adjusting mechanism.

FIG. 6 is a diagram for explaining another example of the space adjusting mechanism.

[Explanation of symbols]

 10M, 10L, 10R Coating machine 15M, 15L, 15R Sliding part 20 Drive mechanism 30 Interval adjustment mechanism

Claims (1)

[Scope of utility model registration request] 1. An automatic coating device in which a plurality of coating machines are independently laterally supported by a guide member through respective sliding parts, and the plurality of coating machines are arranged outside the effective movement range of the sliding parts of adjacent coating machines. A drive mechanism for reciprocating lateral movement of each coating machine while maintaining a constant mutual spacing, and a spacing adjustment mechanism for connecting adjacent coating machines so that the mutual spacing can be adjusted individually. Automatic coating equipment.